检索结果-内蒙古大学图书馆

2023 Conference on Lasers and Electro-Optics, CLEO 2023

作者： Endo, Mamoru He, Ruofan Sonoyama, Tatsuki Takahashi, Kazuma Kashiwazaki, Takahiro Umeki, Takeshi Takasu, Sachiko Hattori, Kaori Fukuda, Daiji Fukui, Kosuke Takase, Kan Asavanant, Warit Yoshikawa, Jun-Ichi Furusawa, Akira Department of Applied Physics School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-8656 Japan Optical Quantum Computing Research Team RIKEN Center for Quantum Computing 2-1 Hirosawa Saitama Wako351-0198 Japan NTT Device Technology Labs. NTT Corporation 3-1 Morinosato Wakamiya Kanagawa Atsugi243-0198 Japan National Institute of Advanced Industrial Science and Technology Ibaraki Tsukuba305-8563 Japan AISTU Tokyo Advanced Operando-Measurement Technology Open Innovation Laboratory Ibaraki Tsukuba305-8563 Japan

Non-Gaussian quantum states were generated by photon subtraction of up to four photons from a squeezed light at 1545.32 nrn. The Wigner negativity and the parity change with the subtracted photon number were directly ... 详细信息

ISBN: (纸本)9781957171258

关键词： Photons

来源：评论

学校读者我要写书评

暂无评论

Experimental verification of charge soliton excitations in the ionic Mott-Peierls ferroelectric TTF-CA

引用

Physical Review B 2023年第12期107卷 125164-125164页

作者： R. Takehara H. Adachi K. Sunami K. Miyagawa T. Miyamoto H. Okamoto S. Horiuchi K. Kanoda Department of Applied Physics University of Tokyo Bunkyo-ku Tokyo 113-8656 Japan Department of Advanced Materials Science University of Tokyo Kashiwa Chiba 277-8561 Japan AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL) National Institute of Advanced Industrial Science and Technology (AIST) Chiba 277-8568 Japan Research Institute for Advanced Electronics and Photonics (RIAEP) National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba Ibaraki 305-8565 Japan

Strong coupling of charge, spin, and lattice in solids brings about emergent elementary excitations with their intertwining and, in one dimension, solitons are known as such. The charge-transferred organic ferroelectric, TTF-CA, has been argued to host charge solitons; however, the existence of the charge solitons remains unverified. Here, we demonstrate that the charge-transport gap in the ionic Mott-Peierls insulating phase of TTF-CA is an order of magnitude smaller than expected from quasiparticle excitations, however, being entirely consistent with the charge soliton excitations. We further suggest that charge and spin solitons move with similar diffusion coefficients in accordance with their coexistence. These results provide a basis for the thermal excitations of the emergent solitons.

关键词： Carrier dynamics Domain walls Electric polarization Electrical conductivity Ferroelectric domains Organic semiconductors Peierls transition Solitons Pressure techniques Resistivity measurements

来源：评论

学校读者我要写书评

暂无评论

On the Constraints in Convex Optimization to Estimate POVM Elements of a Photon-Number-Resolving Detector from Coherent-State Inputs

On the Constraints in Convex Optimization to Estimate POVM E...

引用

Pacific Rim Conference on Lasers and Electro-Optics (CLEO/Pacific Rim)

作者： Akio Yoshizawa Daiji Fukuda National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba-shi Japan AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL) Kashiwa-shi Japan

Smoothing regulation in constrained convex optimization is numerically studied to well estimate POVM elements of a photon-number-resolving detector from coherent-state inputs. Smoothing itself should be optimized with...

关键词：

来源：评论

学校读者我要写书评

暂无评论

Next Generation Optical Quantum State Synthesis: Observation of Fourfold Negativity in the Wigner Function

Next Generation Optical Quantum State Synthesis: Observation...

引用

2024 Laser Science, LS 2024

作者： Endo, Mamoru Takase, Kan Nomura, Takefumi Sonoyama, Tatsuki Takahashi, Kazuma Kashiwazaki, Takahiro Inoue, Asuka Umeki, Takeshi Takasu, Sachiko Fukuda, Daiji Marek, Petr Filip, Radim Asavanant, Warit Furusawa, Akira Department of Applied Physics School of Engineering The University of Tokyo 7-3-1 Hongo Tokyo Bunkyo113-8656 Japan Optical Quantum Computing Research Team RIKEN Center for Quantum Computing 2-1 Hirosawa Saitama Wako351-0198 Japan NTT Device Technology Labs. NTT Corporation 3-1 Morinosato Wakamiya Kanagawa Atsugi243-0198 Japan National Institute of Advanced Industrial Science and Technology Ibaraki Tsukuba305-8563 Japan AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory Ibaraki Tsukuba305-8563 Japan Department of Optics Palacky University 17. listopadu 1192/12 Olomouc77146 Czech Republic

An optical quantum state with fourfold Wigner negativity was generated without any loss correction. Generalized photon subtraction scheme, broadband squeezed light source, and high-temporal-resolution transition-edge sensor enabled generation rates of tens of counts per second. © 2024 The Author(s). © Optica Publishing Group 2024.

关键词： Squeezed light

来源：评论

学校读者我要写书评

暂无评论

Efficient Mott insulator-metal transition by an intense terahertz electric field pulse via quantum tunneling

引用

Physical Review B 2023年第8期107卷 085147-085147页

作者： N. Takamura T. Miyamoto S. Liang K. Asada T. Terashige Y. Takahashi T. Hasegawa H. Okamoto Department of Advanced Materials Science University of Tokyo Kashiwa Chiba 277-8561 Japan AIST-UTokyo Advanced Operand-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL) National Institute of Advanced Industrial Science and Technology (AIST) Kashiwa Chiba 277-8589 Japan Department of Chemistry Faculty of Science and Graduate School of Chemical Sciences and Engineering Hokkaido University Sapporo Hokkaido 060-0810 Japan Department of Applied Physics University of Tokyo Bunkyo-ku Tokyo 113-8656 Japan

When a semiconductor is subjected to a strong electric field, carriers are generated via quantum tunneling; this is termed as dielectric breakdown. Thus, using a terahertz pulse to drive the dielectric breakdown in Mott insulators, which exhibit variations in their electronic structures under carrier doping, a filling-controlled transition can be induced in the subpicosecond time scale. However, to generate carriers via quantum tunneling in a material with a band gap in the visible or near-infrared regions, an electric field pulse significantly exceeding 1 MV cm−1 is necessary. In this paper, using an organic molecular compound, bis(ethylenedithio)tetrathiafulvalene-difluorotetracyanoquinodimethane, which is a typical one-dimensional (1D) Mott insulator with a Mott gap of 0.7 eV, we aimed at realizing carrier generation and metallization via a strong electric field component of a terahertz pulse enhanced with an organic nonlinear optical crystal up to 2.8 MV cm−1. Even after the terahertz electric field decays, the reflectivity change caused by the terahertz pulse remains; this is different from the case involving the use of weaker electric fields. More importantly, this response indicates a threshold behavior against the electric field amplitude, which is characteristic of carrier generation via the quantum tunneling process. Furthermore, transient reflectivity spectra across the mid-infrared region could be reproduced well by numerical simulations using the Drude model, in which inhomogeneous carrier distributions are considered. The observed Drude response of the doublons and holons was ascribed to the spin-charge separation characteristic of 1D strongly correlated electron systems. We also demonstrate that the energy efficiency of such carrier generation by the terahertz pulse excitation is at least five times greater than that when using photoexcitation beyond the Mott gap. This indicates that excitation with the strong terahertz pulse is more effective for car

关键词： Dynamical phase transitions Photoinduced effect 1-dimensional systems Mott insulators Terahertz techniques Time-resolved infrared spectroscopy

来源：评论

学校读者我要写书评

暂无评论

Timing Jitter Remover for Optical Non-Gaussian State Preparation

Timing Jitter Remover for Optical Non-Gaussian State Prepara...

引用

Frontiers in Optics, FiO 2022

作者： Sonoyama, Tatsuki Takahashi, Kazuma Takasu, Sachiko Hattori, Kaori Fukuda, Daiji Asavanant, Warit Takase, Kan Fukui, Kosuke Yoshikawa, Jun-Ichi Endo, Mamoru Furusawa, Akira Department of Applied Physics School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo113-8656 Japan National Institute of Advanced Industrial Science and Technology Ibaraki Tsukuba305-8563 Japan AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory Ibaraki Tsukuba305-8563 Japan Optical Quantum Computing Research Team RIKEN Center for Quantum Computing 2-1 Hirosawa Saitama Wako351-0198 Japan

In this work, we remove the timing jitter of the photon-number-resolving detector which limited non-Gaussian state preparation using a continuous-wave light source, and generate a Schrödinger cat state with Wigne...

ISBN: (纸本)9781557528209

关键词：

来源：评论

学校读者我要写书评

暂无评论

Quantum frequency-resolved optical gating measurement for ultranarrow temporal correlation of twin beams

Optica Quantum

引用

Optica Quantum 2024年第6期2卷 468-474页

作者： Yujiro Eto Mutsuo Nuriya Hideaki Kano Department of Electronic Science and Engineering Kyoto University Kyotodaigakukatsura Nishikyo-ku Kyoto 615-8510 Japan AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory (OPERANDO-OIL) 5-1-5 Kashiwanoha Kashiwa Chiba 277-8561 Japan Department of Pharmacology Keio University School of Medicine 35 Shinanomachi Shinjuku Tokyo 160-8582 Japan Department of Biosciences and Informatics Faculty of Science and Technology Keio University 3-14-1 Hiyoshi Kohoku-ku Yokohama Kanagawa 223-8522 Japan

Intense twin beams generated by high-gain parametric downconversion exhibit simultaneous correlations in time and frequency. To characterize the simultaneous correlations, it is important to determine the temporal correlation profile and the corresponding phase. Although sum frequency generation (SFG) is often used to characterize the temporal correlation of the twin beams, the SFG spectra reconstruct the pump intensity spectrum shape used to generate the twin beams, so useful information for phase reconstruction cannot be obtained from the SFG spectra. We propose and demonstrate frequency-resolved optical gating measurement for ultranarrow temporal correlation of twin beams (referred to as quantum FROG measurement). Quantum FROG measurement for twin beam correlations is realized using a cross-correlator based on four-wave mixing (FWM). We show theoretically that although the quantum FROG trace exhibits a different functional form obtained by the conventional FROG trace for ultrashort pulses, it is sensitive to phase dispersion. In experiments, we observed a shift of the FWM frequency, i.e., frequency chirping, within a correlation time of hundreds of femtoseconds, and the sign of the chirp was also identified.

关键词： Dispersion measurement and metrology Parametric down conversion Phase shift Sum frequency generation Ultrashort pulses

来源：评论

学校读者我要写书评

暂无评论

Non-Gaussian-state generation with time-gated photon detection

引用

Physical Review Research 2023年第3期5卷 033156-033156页

作者： Tatsuki Sonoyama Kazuma Takahashi Baramee Charoensombutamon Sachiko Takasu Kaori Hattori Daiji Fukuda Kosuke Fukui Kan Takase Warit Asavanant Jun-ichi Yoshikawa Mamoru Endo Akira Furusawa Department of Applied Physics School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-8656 Japan National Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki 305-8563 Japan AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory Tsukuba Ibaraki 305-8563 Japan Optical Quantum Computing Research Team RIKEN Center for Quantum Computing 2-1 Hirosawa Wako Saitama 351-0198 Japan

Non-Gaussian states of light, which are essential in fault-tolerant and universal optical quantum computation, are typically generated by a heralding scheme using photon detectors. Recently, it has been theoretically shown that the large timing jitter of the photon detectors deteriorates the purity of the generated non-Gaussian states [T. Sonoyama et al., Phys. Rev. A 105, 043714 (2022)]. Here, we circumvent this problem by time-gated photon detection and generate non-Gaussian states with Wigner negativity using continuous-wave light. We use a fast optical switch for time gating to effectively improve the timing jitter of a photon-number-resolving detector based on a transition edge sensor from 50 ns to 10 ns. As a result, we generate non-Gaussian states with Wigner negativity of −0.011±0.004 (ℏ=1), which cannot be observed without the time-gated photon detection method. These results confirm the effect of the timing jitter on non-Gaussian state generation experimentally for the first time. The proposed time-gated photon detection method would be useful for high-purity non-Gaussian state preparation in optical quantum information processing.

关键词： Quantum optics Quantum state engineering Quantum states of light Single-photon detectors

来源：评论

学校读者我要写书评

暂无评论

Multi-Photon Subtraction from Squeezed Light toward Full Quantum State Engineering

Multi-Photon Subtraction from Squeezed Light toward Full Qua...

引用

Quantum 2.0, QUANTUM 2024 in Quantum 2.0 Conference and Exhibition

作者： Endo, Mamoru Nomura, Takefumi Sonoyama, Tatsuki Takahashi, Kazuma Fukui, Kosuke Kashiwazaki, Takahiro Inoue, Asuka Umeki, Takeshi Takasu, Sachiko Hattori, Kaori Fukuda, Daiji Nehra, Rajveer Marek, Petr Filip, Radim Takase, Kan Asavanant, Warit Furusawa, Akira Department of Applied Physics School of Engineering The University of Tokyo 7-3-1 Hongo Bunkyo Tokyo113-8656 Japan Optical Quantum Computing Research Team RIKEN Center for Quantum Computing 2-1 Hirosawa Saitama Wako351-0198 Japan NTT Device Technology Labs. NTT Corporation 3-1 Morinosato Wakamiya Kanagawa Atsugi243-0198 Japan National Institute of Advanced Industrial Science and Technology Ibaraki Tsukuba305-8563 Japan AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory Ibaraki Tsukuba305-8563 Japan Department of Electrical and Computer Engineering University of Massachusetts-Amherst AmherstMA01003 United States Department of Physics University of Massachusetts-Amherst AmherstMA01003 United States Department of Optics Palacky University 17. listopadu 1192/12 Olomouc77146 Czech Republic

We have applied up to four annihilation operations to squeezed light by photon subtraction. The presence of negative values in the Wigner function for all states indicates the successful implementation of quantum mani... 详细信息

ISBN: (纸本)9781557525185

关键词： Squeezed light

来源：评论

学校读者我要写书评

暂无评论

Non-Gaussian state generation by multi-photon subtraction at the telecommunication wavelength

Non-Gaussian state generation by multi-photon subtraction at...

引用

Conference on Lasers and Electro-Optics (CLEO)

作者： Mamoru Endo Ruofan He Tatsuki Sonoyama Kazuma Takahashi Takahiro Kashiwazaki Takeshi Umeki Sachiko Takasu Kaori Hattori Daiji Fukuda Kosuke Fukui Kan Takase Warit Asavanant Jun-Ichi Yoshikawa Akira Furusawa Department of Applied Physics School of Engineering The University of Tokyo Bunkyo Tokyo Japan Optical Quantum Computing Research Team RIKEN Center for Quantum Computing Wako Saitama Japan NTT Device Technology Labs. NTT Corporation Atsugi Kanagawa Japan National Institute of Advanced Industrial Science and Technology Tsukuba Ibaraki Japan AIST-UTokyo Advanced Operando-Measurement Technology Open Innovation Laboratory Tsukuba Ibaraki Japan

Non-Gaussian quantum states were generated by photon subtraction of up to four photons from a squeezed light at 1545.32 nm. The Wigner negativity and the parity change with the subtracted photon number were directly o... 详细信息

ISBN: (纸本)9781957171258

关键词： Bandpass filters Light wavelength Photons Pulsed operation Quantum information processing Squeezed states

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：