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检索条件"机构=Institute for Quantum Computing and Department of Combinatorics and Optimization"
233 条 记 录,以下是91-100 订阅
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Sample-efficient learning of quantum many-body systems
arXiv
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arXiv 2020年
作者: Anshu, Anurag Arunachalam, Srinivasan Kuwahara, Tomotaka Soleimanifar, Mehdi Institute for Quantum Computing Department of Combinatorics and Optimization University of Waterloo Canada Perimeter Institute for Theoretical Physics Canada IBM Research. RIKEN Japan Center for Theoretical Physics MIT
We study the problem of learning the Hamiltonian of a quantum many-body system given samples from its Gibbs (thermal) state. The classical analog of this problem, known as learning graphical models or Boltzmann machin... 详细信息
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Achieving fault tolerance on capped color codes with few ancillas
arXiv
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arXiv 2021年
作者: Tansuwannont, Theerapat Leung, Debbie Institute for Quantum Computing Department of Physics and Astronomy University of Waterloo WaterlooONN2L 3G1 Canada Department of Electrical and Computer Engineering Duke University DurhamNC27708 United States Institute for Quantum Computing Department of Combinatorics and Optimization University of Waterloo WaterlooONN2L 3G1 Canada Perimeter Institute for Theoretical Physics WaterlooONN2L 2Y5 Canada
Attaining fault tolerance while maintaining low overhead is one of the main challenges in a practical implementation of quantum circuits. One major technique that can overcome this problem is the flag technique, in wh... 详细信息
来源: 评论
Improved local spectral gap thresholds for lattices of finite size
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Physical Review B 2020年 第16期101卷 165104-165104页
作者: Anurag Anshu Institute for Quantum Computing and Department of Combinatorics and Optimization University of Waterloo Waterloo Ontario Canada N2L 3G1 and Perimeter Institute for Theoretical Physics Waterloo Ontario Canada N2L 2Y5
Knabe's theorem lower bounds the spectral gap of a one-dimensional frustration-free local Hamiltonian in terms of the local spectral gaps of finite regions. It also provides a local spectral gap threshold for Hami... 详细信息
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Unified approach to data-driven quantum error mitigation
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Physical Review Research 2021年 第3期3卷 033098-033098页
作者: Angus Lowe Max Hunter Gordon Piotr Czarnik Andrew Arrasmith Patrick J. Coles Lukasz Cincio Department of Combinatorics and Optimization and Institute for Quantum Computing University of Waterloo Waterloo Ontario Canada N2L 3G1 Instituto de Física Teórica UAM/CSIC Universidad Autónoma de Madrid 28049 Madrid Spain Theoretical Division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA Quantum Science Center Oak Ridge Tennessee 37931 USA
Achieving near-term quantum advantage will require effective methods for mitigating hardware noise. Data-driven approaches to error mitigation are promising, with popular examples including zero-noise extrapolation (Z... 详细信息
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Revivals imply quantum many-body scars
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Physical Review B 2020年 第20期101卷 205107-205107页
作者: Álvaro M. Alhambra Anurag Anshu Henrik Wilming Perimeter Institute for Theoretical Physics Waterloo Ontario Canada N2L 2Y5 Institute for Quantum Computing and Department of Combinatorics and Optimization University of Waterloo Waterloo Ontario Canada N2L 3G1 Institute for Theoretical Physics ETH Zurich 8093 Zurich Switzerland
We derive general rigorous results relating revivals in the dynamics of quantum many-body systems to the entanglement properties of energy eigenstates. For a D-dimensional lattice system of N sites initialized in a lo... 详细信息
来源: 评论
Composably secure device-independent encryption with certified deletion
arXiv
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arXiv 2020年
作者: Kundu, Srijita Tan, Ernest Y.-Z. Institute for Quantum Computing Department of Combinatorics and Optimization University of Waterloo WaterlooONN2L 3G1 Canada Institute for Theoretical Physics ETH Zürich Switzerland Institute for Quantum Computing Department of Physics and Astronomy University of Waterloo WaterlooONN2L 3G1 Canada
We study the task of encryption with certified deletion (ECD) introduced by Broadbent and Islam [BI20], but in a device-independent setting: we show that it is possible to achieve this task even when the honest partie... 详细信息
来源: 评论
Fast estimation of outcome probabilities for quantum circuits
arXiv
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arXiv 2021年
作者: Pashayan, Hakop Reardon-Smith, Oliver Korzekwa, Kamil Bartlett, Stephen D. Institute for Quantum Computing Department of Combinatorics and Optimization University of Waterloo ONN2L 3G1 Canada Perimeter Institute for Theoretical Physics WaterlooONN2L 2Y5 Canada Faculty of Physics Astronomy and Applied Computer Science Jagiellonian University Kraków30-348 Poland Centre for Engineered Quantum Systems School of Physics The University of Sydney SydneyNSW2006 Australia
We present two classical algorithms for the simulation of universal quantum circuits on n qubits constructed from c instances of Clifford gates and t arbitrary-angle Z-rotation gates such as T gates. Our algorithms co... 详细信息
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Optical quantum communication complexity in the simultaneous-message-passing model
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Physical Review A 2020年 第6期102卷 062608-062608页
作者: Ashutosh Marwah Dave Touchette Institute for Quantum Computing Department of Physics and Astronomy University of Waterloo 200 University Ave W Waterloo N2L 3G1 ON Canada Institute for Quantum Computing Department of Combinatorics and Optimization University of Waterloo 200 University Ave W Waterloo N2L 3G1 ON Canada Perimeter Institute for Theoretical Physics 31 Caroline St N Waterloo N2L 2Y5 ON Canada
The communication cost of a classical protocol is typically measured in terms of the number of bits communicated for this determines the time required for communication during the protocol. Similarly, for quantum comm... 详细信息
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Adaptive shot allocation for fast convergence in variational quantum algorithms
arXiv
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arXiv 2021年
作者: Gu, Andi Lowe, Angus Dub, Pavel A. Coles, Patrick J. Arrasmith, Andrew Theoretical Division Los Alamos National Laboratory Los AlamosNM87545 United States Department of Physics University of California BerkeleyCA94720 United States Department of Combinatorics and Optimization and Institute for Quantum Computing University of Waterloo WaterlooONN2L 3G1 Canada Chemistry Division Los Alamos National Laboratory Los AlamosNM87545 United States
Variational quantum Algorithms (VQAs) are a promising approach for practical applications like chemistry and materials science on near-term quantum computers as they typically reduce quantum resource requirements. How... 详细信息
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Reducing the CNOT count for Clifford+T circuits on NISQ architectures
arXiv
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arXiv 2020年
作者: Gheorghiu, Vlad Huang, Jiaxin Li, Sarah Meng Mosca, Michele Mukhopadhyay, Priyanka Institute for Quantum Computing University of Waterloo WaterlooON Canada SoftwareQ Inc. KitchenerON Canada Faculty of Mathematics University of Waterloo Canada Department of Combinatorics and Optimization University of Waterloo WaterlooON Canada Perimeter Institute for Theoretical Physics Waterloo WaterlooON Canada
While mapping a quantum circuit to the physical layer one has to consider the numerous constraints imposed by the underlying hardware architecture. Connectivity of the physical qubits is one such constraint that restr... 详细信息
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