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Localized state in a two-dimensional quantum walk on a disordered lattice

physical Review A 2015年第4期92卷 042316-042316页

作者： Peng Xue Rong Zhang Zhihao Bian Xiang Zhan Hao Qin Barry C. Sanders Department of Physics Southeast University Nanjing 211189 China Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of China Hefei Anhui 230026 China Shanghai Branch CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of China Shanghai 201315 China Institute for Quantum Science and Technology University of Calgary Alberta Canada T2N 1N4 Program in Quantum Information Science Canadian Institute for Advanced Research Toronto Ontario Canada M5G 1Z8

We realize a pair of simultaneous ten-step one-dimensional quantum walks with two walkers sharing coins, which we prove is analogous to the ten-step two-dimensional quantum walk with a single walker holding a four-dimensional coin. Our experiment demonstrates a ten-step quantum walk over an 11×11 two-dimensional lattice with a line defect, thereby realizing a localized walker state.

关键词： Random walks (Mathematics) Mathematical physics Line defects (Crystallography) Quantum computing Photosynthesis Nuclear magnetic resonance

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Measurement of differential cross sections for top quark pair production using the lepton+jets final state in proton-proton collisions at 13 TeV

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physical Review D 2017年第9期95卷 092001-092001页

作者： V. Khachatryan A. M. Sirunyan A. Tumasyan W. Adam E. Asilar T. Bergauer J. Brandstetter E. Brondolin M. Dragicevic J. Erö M. Flechl M. Friedl R. Frühwirth V. M. Ghete C. Hartl N. Hörmann J. Hrubec M. Jeitler A. König I. Krätschmer D. Liko T. Matsushita I. Mikulec D. Rabady N. Rad B. Rahbaran H. Rohringer J. Schieck J. Strauss W. Waltenberger C.-E. Wulz O. Dvornikov V. Makarenko V. Zykunov V. Mossolov N. Shumeiko J. Suarez Gonzalez S. Alderweireldt E. A. De Wolf X. Janssen J. Lauwers M. Van De Klundert H. Van Haevermaet P. Van Mechelen N. Van Remortel A. Van Spilbeeck S. Abu Zeid F. Blekman J. D’Hondt N. Daci I. De Bruyn K. Deroover S. Lowette S. Moortgat L. Moreels A. Olbrechts Q. Python S. Tavernier W. Van Doninck P. Van Mulders I. Van Parijs H. Brun B. Clerbaux G. De Lentdecker H. Delannoy G. Fasanella L. Favart R. Goldouzian A. Grebenyuk G. Karapostoli T. Lenzi A. Léonard J. Luetic T. Maerschalk A. Marinov A. Randle-conde T. Seva C. Vander Velde P. Vanlaer R. Yonamine F. Zenoni F. Zhang A. Cimmino T. Cornelis D. Dobur A. Fagot G. Garcia M. Gul I. Khvastunov D. Poyraz S. Salva R. Schöfbeck A. Sharma M. Tytgat W. Van Driessche E. Yazgan N. Zaganidis H. Bakhshiansohi C. Beluffi O. Bondu S. Brochet G. Bruno A. Caudron S. De Visscher C. Delaere M. Delcourt B. Francois A. Giammanco A. Jafari P. Jez M. Komm V. Lemaitre A. Magitteri A. Mertens M. Musich C. Nuttens K. Piotrzkowski L. Quertenmont M. Selvaggi M. Vidal Marono S. Wertz N. Beliy W. L. Aldá Júnior F. L. Alves G. A. Alves L. Brito C. Hensel A. Moraes M. E. Pol P. Rebello Teles E. Belchior Batista Das Chagas W. Carvalho J. Chinellato A. Custódio E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao C. De Oliveira Martins S. Fonseca De Souza L. M. Huertas Guativa H. Malbouisson D. Matos Figueiredo C. Mora Herrera L. Mundim H. Nogima W. L. Prado Da Silva A. Santoro A. Sznajder E. J. Tonelli Manganote A. Vilela Pereira S. Ahuja C. A. Bernardes S. Dogra T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante C. S. Moon S. F. Novaes Sandra S. Padula D. Romero Aba Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Wien Austria Institute for Nuclear Problems Minsk Belarus National Centre for Particle and High Energy Physics Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium CERN European Organization for Nuclear Research Geneva Switzerland Université Catholique de Louvain Louvain-la-Neuve Belgium Université de Mons Mons Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista São Paulo Brazil Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria University of Sofia Sofia Bulgaria Beihang University Beijing China National Centre for Physics Quaid-I-Azam University Islamabad Pakistan Institute of High Energy Physics Beijing China California Institute of Technology Pasadena California USA Texas Tech University Lubbock Texas USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Universidad de Los Andes Bogota Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland IRFU CEA Université Paris-Saclay Gif-sur-Yvette Fra

Differential and double-differential cross sections for the production of top quark pairs in proton-proton collisions at 13 TeV are measured as a function of jet multiplicity and of kinematic variables of the top quarks and the top quark-antiquark system. This analysis is based on data collected by the CMS experiment at the LHC corresponding to an integrated luminosity of 2.3 fb−1. The measurements are performed in the lepton+jets decay channels with a single muon or electron in the final state. The differential cross sections are presented at particle level, within a phase space close to the experimental acceptance, and at parton level in the full phase space. The results are compared to several standard model predictions.

关键词： Hadron-hadron interactions

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Pseudorapidity dependence of long-range two-particle correlations in pPb collisions at sNN=5.02 TeV

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physical Review C 2017年第1期96卷 014915-014915页

作者： V. Khachatryan A. M. Sirunyan A. Tumasyan W. Adam E. Asilar T. Bergauer J. Brandstetter E. Brondolin M. Dragicevic J. Erö M. Flechl M. Friedl R. Frühwirth V. M. Ghete C. Hartl N. Hörmann J. Hrubec M. Jeitler V. Knünz A. König M. Krammer I. Krätschmer D. Liko T. Matsushita I. Mikulec D. Rabady N. Rad B. Rahbaran H. Rohringer J. Schieck R. Schöfbeck J. Strauss W. Treberer-Treberspurg W. Waltenberger C.-E. Wulz V. Mossolov N. Shumeiko J. Suarez Gonzalez S. Alderweireldt T. Cornelis E. A. De Wolf X. Janssen A. Knutsson J. Lauwers S. Luyckx M. Van De Klundert H. Van Haevermaet P. Van Mechelen N. Van Remortel A. Van Spilbeeck S. Abu Zeid F. Blekman J. D'Hondt N. Daci I. De Bruyn K. Deroover N. Heracleous J. Keaveney S. Lowette L. Moreels A. Olbrechts Q. Python D. Strom S. Tavernier W. Van Doninck P. Van Mulders G. P. Van Onsem I. Van Parijs P. Barria H. Brun C. Caillol B. Clerbaux G. De Lentdecker G. Fasanella L. Favart R. Goldouzian A. Grebenyuk G. Karapostoli T. Lenzi A. Léonard T. Maerschalk A. Marinov L. Pernié A. Randle-conde T. Seva C. Vander Velde P. Vanlaer R. Yonamine F. Zenoni F. Zhang K. Beernaert L. Benucci A. Cimmino S. Crucy D. Dobur A. Fagot G. Garcia M. Gul J. Mccartin A. A. Ocampo Rios D. Poyraz D. Ryckbosch S. Salva M. Sigamani M. Tytgat W. Van Driessche E. Yazgan N. Zaganidis S. Basegmez C. Beluffi O. Bondu S. Brochet G. Bruno A. Caudron L. Ceard C. Delaere D. Favart L. Forthomme A. Giammanco A. Jafari P. Jez M. Komm V. Lemaitre A. Mertens M. Musich C. Nuttens L. Perrini K. Piotrzkowski A. Popov L. Quertenmont M. Selvaggi M. Vidal Marono N. Beliy G. H. Hammad W. L. Aldá Júnior F. L. Alves G. A. Alves L. Brito M. Correa Martins Junior M. Hamer C. Hensel A. Moraes M. E. Pol P. Rebello Teles E. Belchior Batista Das Chagas W. Carvalho J. Chinellato A. Custódio E. M. Da Costa D. De Jesus Damiao C. De Oliveira Martins S. Fonseca De Souza L. M. Huertas Guativa H. Malbouisson D. Matos Figueiredo C. Mora Herrera L. Mundim H. Nogima W. L. Prado Da Silva A. Santoro A. Sznajder E. J. Tonelli Manganote A. Vilela Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik der OeAW Wien Austria National Centre for Particle and High Energy Physics Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Université de Mons Mons Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista São Paulo Brazil Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria University of Sofia Sofia Bulgaria National Centre for Physics Quaid-I-Azam University Islamabad Pakistan Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Vanderbilt University Nashville Tennessee USA Universidad de Los Andes Bogota Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland DSM/IRFU CEA/Saclay Gif-sur-Yvette France Laboratoire Leprince-Ringuet Ecole Polytechnique IN2P3-CNRS Palaiseau France Institut Pluridisciplinaire Hubert Curien Université de Strasbourg Université de Haute Alsace Mulhouse CNRS/IN2P3 Strasbourg France Centre de Calcul de l'Institut National de

Two-particle correlations in pPb collisions at a nucleon-nucleon center-of-mass energy of 5.02TeV are studied as a function of the pseudorapidity separation (Δη) of the particle pair at small relative azimuthal angle (|Δϕ|<π/3). The correlations are decomposed into a jet component that dominates the short-range correlations (|Δη|<1), and a component that persists at large Δη and may originate from collective behavior of the produced system. The events are classified in terms of the multiplicity of the produced particles. Finite azimuthal anisotropies are observed in high-multiplicity events. The second and third Fourier components of the particle-pair azimuthal correlations, V2 and V3, are extracted after subtraction of the jet component. The single-particle anisotropy parameters v2 and v3 are normalized by their laboratory frame midrapidity value and are studied as a function of ηc.m.. The normalized v2 distribution is found to be asymmetric about ηc.m.=0, with smaller values observed at forward pseudorapidity, corresponding to the direction of the proton beam, while no significant pseudorapidity dependence is observed for the normalized v3 distribution within the statistical uncertainties.

关键词： Nuclear reactions Particle correlations & fluctuations Relativistic heavy-ion collisions

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Inclusive search for supersymmetry using razor variables in pp collisions at s=13 TeV

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physical Review D 2017年第1期95卷 012003-012003页

作者： V. Khachatryan A. M. Sirunyan A. Tumasyan W. Adam E. Asilar T. Bergauer J. Brandstetter E. Brondolin M. Dragicevic J. Erö M. Flechl M. Friedl R. Frühwirth V. M. Ghete C. Hartl N. Hörmann J. Hrubec M. Jeitler A. König I. Krätschmer D. Liko T. Matsushita I. Mikulec D. Rabady N. Rad B. Rahbaran H. Rohringer J. Schieck J. Strauss W. Treberer-Treberspurg W. Waltenberger C.-E. Wulz V. Mossolov N. Shumeiko J. Suarez Gonzalez S. Alderweireldt E. A. De Wolf X. Janssen J. Lauwers M. Van De Klundert H. Van Haevermaet P. Van Mechelen N. Van Remortel A. Van Spilbeeck S. Abu Zeid F. Blekman J. D’Hondt N. Daci I. De Bruyn K. Deroover N. Heracleous S. Lowette S. Moortgat L. Moreels A. Olbrechts Q. Python S. Tavernier W. Van Doninck P. Van Mulders I. Van Parijs H. Brun C. Caillol B. Clerbaux G. De Lentdecker H. Delannoy G. Fasanella L. Favart R. Goldouzian A. Grebenyuk G. Karapostoli T. Lenzi A. Léonard J. Luetic T. Maerschalk A. Marinov A. Randle-conde T. Seva C. Vander Velde P. Vanlaer R. Yonamine F. Zenoni F. Zhang A. Cimmino T. Cornelis D. Dobur A. Fagot G. Garcia M. Gul D. Poyraz S. Salva R. Schöfbeck M. Tytgat W. Van Driessche E. Yazgan N. Zaganidis H. Bakhshiansohi C. Beluffi O. Bondu S. Brochet G. Bruno A. Caudron S. De Visscher C. Delaere M. Delcourt B. Francois A. Giammanco A. Jafari P. Jez M. Komm V. Lemaitre A. Magitteri A. Mertens M. Musich C. Nuttens K. Piotrzkowski L. Quertenmont M. Selvaggi M. Vidal Marono S. Wertz N. Beliy W. L. Aldá Júnior F. L. Alves G. A. Alves L. Brito C. Hensel A. Moraes M. E. Pol P. Rebello Teles E. Belchior Batista Das Chagas W. Carvalho J. Chinellato A. Custódio E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao C. De Oliveira Martins S. Fonseca De Souza L. M. Huertas Guativa H. Malbouisson D. Matos Figueiredo C. Mora Herrera L. Mundim H. Nogima W. L. Prado Da Silva A. Santoro A. Sznajder E. J. Tonelli Manganote A. Vilela Pereira S. Ahuja C. A. Bernardes S. Dogra T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante C. S. Moon S. F. Novaes Sandra S. Padula D. Romero Abad J. C. Ruiz Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Wien Austria National Centre for Particle and High Energy Physics Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Université de Mons Mons Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista São Paulo Brazil Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria University of Sofia Sofia Bulgaria Beihang University Beijing China National Centre for Physics Quaid-I-Azam University Islamabad Pakistan Institute of High Energy Physics Beijing China California Institute of Technology Pasadena California USA Texas Tech University Lubbock Texas USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Universidad de Los Andes Bogota Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland IRFU CEA Université Paris-Saclay Gif-sur-Yvette France Saha Institute of Nuclear Physics Kolkata India Laboratoire Leprince-Ringuet Ecole Polytechnique IN2P3-CNRS

An inclusive search for supersymmetry using razor variables is performed in events with four or more jets and no more than one lepton. The results are based on a sample of proton-proton collisions corresponding to an integrated luminosity of 2.3 fb−1 collected with the CMS experiment at a center-of-mass energy of s=13 TeV. No significant excess over the background prediction is observed in data, and 95% confidence level exclusion limits are placed on the masses of new heavy particles in a variety of simplified models. Assuming that pair-produced gluinos decay only via three-body processes involving third-generation quarks plus a neutralino, and that the neutralino is the lightest supersymmetric particle with a mass of 200 GeV, gluino masses below 1.6 TeV are excluded for any branching fractions for the individual gluino decay modes. For some specific decay mode scenarios, gluino masses up to 1.65 TeV are excluded. For decays to first- and second-generation quarks and a neutralino with a mass of 200 GeV, gluinos with masses up to 1.4 TeV are excluded. Pair production of top squarks decaying to a top quark and a neutralino with a mass of 100 GeV is excluded for top squark masses up to 750 GeV.

关键词： Supersymmetric models

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Measurements of differential cross sections for associated production of a W boson and jets in proton-proton collisions at s=8 TeV

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physical Review D 2017年第5期95卷 052002-052002页

作者： V. Khachatryan A. M. Sirunyan A. Tumasyan W. Adam E. Asilar T. Bergauer J. Brandstetter E. Brondolin M. Dragicevic J. Erö M. Flechl M. Friedl R. Frühwirth V. M. Ghete C. Hartl N. Hörmann J. Hrubec M. Jeitler A. König I. Krätschmer D. Liko T. Matsushita I. Mikulec D. Rabady N. Rad B. Rahbaran H. Rohringer J. Schieck J. Strauss W. Treberer-Treberspurg W. Waltenberger C.-E. Wulz V. Mossolov N. Shumeiko J. Suarez Gonzalez S. Alderweireldt E. A. De Wolf X. Janssen J. Lauwers M. Van De Klundert H. Van Haevermaet P. Van Mechelen N. Van Remortel A. Van Spilbeeck S. Abu Zeid F. Blekman J. D’Hondt N. Daci I. De Bruyn K. Deroover N. Heracleous S. Lowette S. Moortgat L. Moreels A. Olbrechts Q. Python S. Tavernier W. Van Doninck P. Van Mulders I. Van Parijs H. Brun C. Caillol B. Clerbaux G. De Lentdecker H. Delannoy G. Fasanella L. Favart R. Goldouzian A. Grebenyuk G. Karapostoli T. Lenzi A. Léonard J. Luetic T. Maerschalk A. Marinov A. Randle-conde T. Seva C. Vander Velde P. Vanlaer R. Yonamine F. Zenoni F. Zhang A. Cimmino T. Cornelis D. Dobur A. Fagot G. Garcia M. Gul D. Poyraz S. Salva R. Schöfbeck M. Tytgat W. Van Driessche E. Yazgan N. Zaganidis H. Bakhshiansohi C. Beluffi O. Bondu S. Brochet G. Bruno A. Caudron S. De Visscher C. Delaere M. Delcourt B. Francois A. Giammanco A. Jafari P. Jez M. Komm V. Lemaitre A. Magitteri A. Mertens M. Musich C. Nuttens K. Piotrzkowski L. Quertenmont M. Selvaggi M. Vidal Marono S. Wertz N. Beliy W. L. Aldá Júnior F. L. Alves G. A. Alves L. Brito C. Hensel A. Moraes M. E. Pol P. Rebello Teles E. Belchior Batista Das Chagas W. Carvalho J. Chinellato A. Custódio E. M. Da Costa G. G. Da Silveira D. De Jesus Damiao C. De Oliveira Martins S. Fonseca De Souza L. M. Huertas Guativa H. Malbouisson D. Matos Figueiredo C. Mora Herrera L. Mundim H. Nogima W. L. Prado Da Silva A. Santoro A. Sznajder E. J. Tonelli Manganote A. Vilela Pereira S. Ahuja C. A. Bernardes S. Dogra T. R. Fernandez Perez Tomei E. M. Gregores P. G. Mercadante C. S. Moon S. F. Novaes Sandra S. Padula D. Romero Abad J. C. Ruiz Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Wien Austria National Centre for Particle and High Energy Physics Minsk Belarus Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Université de Mons Mons Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista São Paulo Brazil Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Sofia Bulgaria University of Sofia Sofia Bulgaria Beihang University Beijing China National Centre for Physics Quaid-I-Azam University Islamabad Pakistan Institute of High Energy Physics Beijing China California Institute of Technology Pasadena California USA Texas Tech University Lubbock Texas USA State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Universidad de Los Andes Bogota Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics University of Helsinki Helsinki Finland Helsinki Institute of Physics Helsinki Finland Lappeenranta University of Technology Lappeenranta Finland IRFU CEA Université Paris-Saclay Gif-sur-Yvette France Saha Institute of Nuclear Physics Kolkata India Laboratoire Leprince-Ringuet Ecole Polytechnique IN2P3-CNRS

Differential cross sections for a W boson produced in association with jets are measured in a data sample of proton-proton collisions at a center-of-mass energy of 8 TeV recorded with the CMS detector and corresponding to an integrated luminosity of 19.6 fb−1. The W bosons are identified through their decay mode W→μν. The cross sections are reported as functions of jet multiplicity, transverse momenta, and the scalar sum of jet transverse momenta (HT) for different jet multiplicities. Distributions of the angular correlations between the jets and the muon are examined, as well as the average number of jets as a function of HT and as a function of angular variables. The measured differential cross sections are compared with tree-level and higher-order recent event generators, as well as next-to-leading-order and next-to-next-to-leading-order theoretical predictions. The agreement of the generators with the measurements builds confidence in their use for the simulation of W+jets background processes in searches for new physics at the LHC.

关键词： Hadron-hadron interactions Particle production

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A manual wheelchair assistance system which cancels a gravitational force on a slope

A manual wheelchair assistance system which cancels a gravit...

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IEEE International Conference on Industrial technology (ICIT)

作者： Daisuke Chugo Masahiro Goto Satoshi Muramatsu Sho Yokota Yuki Sakaida Hiroshi Hashimoto Graduate School of Science and Technology Kwansei Gakuin University Sanda Hyogo Japan RIKEN-SRK Collaboration Center for Human-Interactive Robot Research RIKEN (The Institute of Physical and Chemical Research) Nagoya Aichi Japan Faculty of Science and Engineering Toyo University Kawagoe Saitama Japan Master Program of Innovation for Design and Engineering Advanced Institute of Industrial Technology Shinagawa Tokyo Japan

This paper proposes a novel driving assistance system for a manual wheelchair. On an inclination road, there is a high risk of moving the direction, which a manual wheelchair user does not intend, because of a gravitational force. Our proposed system cancels the wheel traction, which is generated according to the inclination of the road, using only servo brakes on each wheel. Our system measures the inclination of the road and estimates the wheel traction generated by a gravitational force. Then, our system cancels this traction and its user can use this wheelchair as its user drives it on no inclination flat ground. Its user can use it intuitively because its user drives this wheelchair by rowing its hand rims as usual and our assistance system works passively with their own intentional force. For realizing this idea, our system uses only servo brakes which can generate the various required brake traction. Our system does not require actuators, and its mechanism is simple and low cost. There is no risk by malfunction of servomotors. We test our proposed assistance system by the experiments with our prototype and verify its effectiveness.

关键词： Wheelchairs Wheels Acceleration Gravity Roads Servomotors

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Proceedings of the 16th Annual UT-KBRIN Bioinformatics Summit 2016: proceedings

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BMC Proceedings 2017年第9期11卷 1-6页

作者： L. Leon Dent Sammed N. Mandape Siddharth Pratap Jianan Dong Jamaine Davis Jennifer A. Gaddy Kofi Amoah Steve Damo Dana R. Marshall Jacob Jones Toni Brandt Gilberto Diaz Qingguo Wang Todd Gary Ashwini Yenamandra Marina Z. Ghattas Marwa Elrakaiby Ramy K. Aziz Hamdallah H. Zedan Moamen Elmassry Marwa ElRakaiby Mariam Lotfy Jarrad Marcel Rania A. Khattab Maha M. Abdelfattah Jack A. Gilbert Pouya Dini Shavahn C. Loux Kirsten E. Scoggin Alejandro Esteller-Vico Edward L. Squires Mats H. T. Troedsson Barry A. Ball Peter Daels Kalpani De Silva Ernest Bailey Joel C. Stephens Theodore S. Kalbfleisch Christine E. Dolin Lauren G. Poole Gavin E. Arteel Michael L. Merchant Daniel W. Wilkey Michelle T. Barati Eric C. Rouchka Richard M. Higashi Teresa W-M Fan Hunter Moseley Andrew N Lane Department of Surgery Meharry Medical College Nashville TN 37208 USA Bioinformatics Core Meharry Medical College Nashville TN 37208 USA Department of Biochemistry and Cancer Biology Meharry Medical College Nashville TN 37208 USA Department of Medicine Vanderbilt University Medical Center Nashville TN 37232 USA Department of Life and Physical Sciences Fisk University Nashville TN 37208 USA Department of Pathology Anatomy and Cell Biology Meharry Medical College Nashville TN 37208 USA College of Computing and Technology Lipscomb University 1 University Park Drive Nashville TN 37204 USA Vanderbilt University Medical Center Nashville TN 37232 USA Office of Research Middle Tennessee State University 1301 East Main St Murfreesboro TN 37132 USA Department of Microbiology and Immunology Faculty of Pharmacy Cairo University Cairo Egypt Department of Biological Sciences Texas Tech University Lubbock TX 79409 USA Clinical Operations Department Ray-Clinical Research Organization Giza Egypt Genomic and Systems Biology Bioscience Division Argonne National Laboratory Argonne IL 60439 USA Research Institute of Ophthalmology Giza Egypt Department of Surgery University of Chicago Chicago IL 60637 USA Microbial Ecology Group Argonne National Laboratory Argonne IL 60439 USA Department of Veterinary Science University of Kentucky Lexington KY 40536 USA Department of Reproduction Faculty of Veterinary Medicine University of Gent Merelbeke Belgium Interdisciplinary Studies Program: Specialization in Bioinformatics University of Louisville Louisville KY 40292 USA Department of Veterinary Science University of Kentucky Lexington KY 40506 USA Genomics GPS Guilford CT 06437 USA Department of Biochemistry and Molecular Genetics School of Medicine University of Louisville Louisville KY 40292 USA Department of Pharmacology & Toxicology University of Louisville Louisville KY 40202 USA Department of Medicine University of Louisville

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Unresolved gamma-ray sky through its angular power spectrum

arXiv

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arXiv 2018年

作者： Ackermann, M. Ajello, M. Baldini, L. Ballet, J. Barbiellini, G. Bastieri, D. Bellazzini, R. Bissaldi, E. Blandford, R.D. Bonino, R. Bottacini, E. Bregeon, J. Bruel, P. Buehler, R. Burns, E. Buson, S. Cameron, R.A. Caputo, R. Caraveo, P.A. Cavazzuti, E. Chen, S. Chiaro, G. Ciprini, S. Costantin, D. Cuoco, A. Cutini, S. D’Ammando, F. de la Torre Luque, P. de Palma, F. Desai, A. Digel, S.W. Di Lalla, N. Di Mauro, M. Di Venere, L. Fana Dirirsa, F. Favuzzi, C. Franckowiak, A. Fukazawa, Y. Funk, S. Fusco, P. Gargano, F. Gasparrini, D. Giglietto, N. Giordano, F. Giroletti, M. Green, D. Grenier, I.A. Guillemot, L. Guiriec, S. Horan, D. Jóhannesson, G. Kuss, M. Larsson, S. Latronico, L. Li, J. Liodakis, I. Longo, F. Loparco, F. Lubrano, P. Magill, J.D. Maldera, S. Malyshev, D. Manfreda, A. Mazziotta, M.N. Mereu, I. Michelson, P.F. Mitthumsiri, W. Mizuno, T. Monzani, M.E. Morselli, A. Moskalenko, I.V. Negro, M. Nuss, E. Orienti, M. Orlando, E. Palatiello, M. Paliya, V.S. Paneque, D. Persic, M. Pesce-Rollins, M. Petrosian, V. Piron, F. Porter, T.A. Principe, G. Rainò, S. Rando, R. Razzano, M. Razzaque, S. Reimer, A. Reimer, O. Serini, D. Sgrò, C. Siskind, E.J. Spandre, G. Spinelli, P. Suson, D.J. Tajima, H. Takahashi, M. Thayer, J.B. Tibaldo, L. Torres, D.F. Troja, E. Venters, T.M. Vianello, G. Wood, K. Yassine, M. Zaharijas, G. Ammazzalorso, S. Fornengo, N. Regis, M. Deutsches Elektronen Synchrotron DESY ZeuthenD-15738 Germany Department of Physics and Astronomy Clemson University Kinard Lab of Physics ClemsonSC29634-0978 United States Università di Pisa Istituto Nazionale di Fisica Nucleare Sezione di Pisa PisaI-56127 Italy Laboratoire AIM CEA-IRFU CNRS Université Paris Diderot Service d’Astrophysique CEA Saclay Gif sur YvetteF-91191 France Istituto Nazionale di Fisica Nucleare Sezione di Trieste TriesteI-34127 Italy Dipartimento di Fisica Università di Trieste TriesteI-34127 Italy Istituto Nazionale di Fisica Nucleare Sezione di Padova PadovaI-35131 Italy Dipartimento di Fisica e Astronomia "G. Galilei" Università di Padova PadovaI-35131 Italy Istituto Nazionale di Fisica Nucleare Sezione di Pisa PisaI-56127 Italy Dipartimento di Fisica "M. Merlin" dell’Università e del Politecnico di Bari BariI-70126 Italy Istituto Nazionale di Fisica Nucleare Sezione di Bari BariI-70126 Italy W. W. Hansen Experimental Physics Laboratory Kavli Institute for Particle Astrophysics and Cosmology Department of Physics SLAC National Accelerator Laboratory Stanford University StanfordCA94305 United States Istituto Nazionale di Fisica Nucleare Sezione di Torino TorinoI-10125 Italy Dipartimento di Fisica Università degli Studi di Torino TorinoI-10125 Italy Department of Physics and Astronomy University of Padova Vicolo Osservatorio 3 PadovaI-35122 Italy Laboratoire Univers et Particules de Montpellier Université Montpellier CNRS/IN2P3 MontpellierF-34095 France Laboratoire Leprince-Ringuet École polytechnique CNRS/IN2P3 PalaiseauF-91128 France NASA Goddard Space Flight Center GreenbeltMD20771 United States NASA Postdoctoral Program Fellow United States NASA Goddard Space Flight Center GreenbeltMD20771 United States INAF-Istituto di Astrofisica Spaziale e Fisica Cosmica Milano via E. Bassini 15 MilanoI-20133 Italy Italian Space Agency Via del Politecnico snc Roma00133 Italy Space Science Data Center -

The gamma-ray sky has been observed with unprecedented accuracy in the last decade by the Fermi large area telescope (LAT), allowing us to resolve and understand the high-energy Universe. The nature of the remaining unresolved emission (unresolved gamma-ray background, UGRB) below the LAT source detection threshold can be uncovered by characterizing the amplitude and angular scale of the UGRB fluctuation field. This work presents a measurement of the UGRB autocorrelation angular power spectrum based on eight years of Fermi LAT Pass 8 data products. The analysis is designed to be robust against contamination from resolved sources and noise systematics. The sensitivity to subthreshold sources is greatly enhanced with respect to previous measurements. We find evidence (with ∼ 3.7σ significance) that the scenario in which two classes of sources contribute to the UGRB signal is favored over a single class. A double power law with exponential cutoff can explain the anisotropy energy spectrum well, with photon indices of the two populations being 2.55 ± 0.23 and 1.86 ± 0.15. Copyright © 2018, The Authors. All rights reserved.

关键词： Gamma rays

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Experimental Quantum-Walk Revival with a Time-Dependent Coin

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physical Review Letters 2015年第14期114卷 140502-140502页

作者： P. Xue R. Zhang H. Qin X. Zhan Z. H. Bian J. Li Barry C. Sanders Department of Physics Southeast University Nanjing 211189 China State Key Laboratory of Precision Spectroscopy East China Normal University Shanghai 200062 China Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of China Hefei Anhui 230026 China Shanghai Branch CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of China Shanghai 201315 China Institute for Quantum Science and Technology University of Calgary Alberta T2N 1N4 Canada Program in Quantum Information Science Canadian Institute for Advanced Research Toronto Ontario M5G 1Z8 Canada

We demonstrate a quantum walk with time-dependent coin bias. With this technique we realize an experimental single-photon one-dimensional quantum walk with a linearly ramped time-dependent coin flip operation and thereby demonstrate two periodic revivals of the walker distribution. In our beam-displacer interferometer, the walk corresponds to movement between discretely separated transverse modes of the field serving as lattice sites, and the time-dependent coin flip is effected by implementing a different angle between the optical axis of half-wave plate and the light propagation at each step. Each of the quantum-walk steps required to realize a revival comprises two sequential orthogonal coin-flip operators, with one coin having constant bias and the other coin having a time-dependent ramped coin bias, followed by a conditional translation of the walker.

关键词： QUANTUM mechanics PHOTONS GAUGE bosons MECHANICS (Physics) TIME

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Realization of Single-Qubit Positive-Operator-Valued Measurement via a One-Dimensional Photonic Quantum Walk

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physical Review Letters 2015年第20期114卷 203602-203602页

作者： Zhihao Bian Jian Li Hao Qin Xiang Zhan Rong Zhang Barry C. Sanders Peng Xue Department of Physics Southeast University Nanjing 211189 China Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of China Hefei Anhui 230026 China Shanghai Branch CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics University of Science and Technology of China Shanghai 201315 China Institute for Quantum Science and Technology University of Calgary Alberta T2N 1N4 Canada Program in Quantum Information Science Canadian Institute for Advanced Research Toronto Ontario M5G 1Z8 Canada State Key Laboratory of Precision Spectroscopy East China Normal University Shanghai 200062 China Beijing Institute of Mechanical and Electrical Space Beijing 100094 China

We perform generalized measurements of a qubit by realizing the qubit as a coin in a photonic quantum walk and subjecting the walker to projective measurements. Our experimental technique can be used to realize, photonically, any rank-1 single-qubit positive-operator-valued measure via constructing an appropriate interferometric quantum-walk network and then projectively measuring the walker’s position at the final step.

关键词： PHOTONS POSITIVE operators LIGHT quantization LINEAR operators QUANTUM theory

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