Kosuke Shibata

(柴田康介)

Profile Information

Affiliation: Faculty of Science Department of Physics, Gakushuin University

Degree: 博士（理学）(京都大学)
修士（理学）(京都大学)

Researcher number: 90735440
J-GLOBAL ID: 201401011808942496
researchmap Member ID: 7000007606

Research Interests

量子エレクトロニクス

Research Areas

Natural sciences / Semiconductors, optical and atomic physics /

Research History

Apr, 2017

Gakushuin University
Apr, 2014 - Mar, 2017

Faculty of Science and Engineering, Department of Physics, Chuo University
Feb, 2014 - Mar, 2014

Graduate School of Science, Kyoto University
Apr, 2013 - Jan, 2014

京都大学大学院理学研究科物理学宇宙物理学専攻物理学第一分野教務補佐員
Apr, 2010 - Mar, 2012

日本学術振興会特別研究員DC2（京都大学大学院理学研究科）

Education

- 2013

Kyoto University
- 2012

Kyoto University
- 2007

Kyoto University
- 2005

Faculty of Science, Kyoto University

Awards

Papers

Multistate interferometric measurement of the nonlinear ac Stark shift

Junnosuke Takai, Kosuke Shibata, Naota Sekiguchi, Takuya Hirano

Physical Review A, May 11, 2023
Improved waveguide-based ultraviolet light generation and pulsed squeezing at 795 nm

Aki Torii, Kosuke Shibata, Yujiro Eto, Takuya Hirano

Optics Express, 30(15) 26120-26120, Jul 18, 2022

We report on the waveguide-based generation of pulsed squeezed light at 795 nm, suitable for quantum enhanced measurements with rubidium atoms. Pulsed ultraviolet second harmonic light with a power of more than 400 mW is produced using a periodically poled LiNbO₃ (PPLN) waveguide and is injected into another PPLN waveguide to generate quadrature squeezing. We find that the phase of the second harmonic pulse is shifted within a pulse, and we attribute the shift to heating due to blue-light induced infrared absorption (BLIIRA) from a comparison between the experiment and a numerical simulation. A squeezing level of −1.5(1) dB is observed in homodyne detection when we apply a linear phase shift to the local oscillator. The experiment and simulation imply that the squeezing level can be further improved by reducing BLIIRA.
Sensitive spatially resolved magnetometry using a Bose-condensed gas with a bright probe

Naota Sekiguchi, Kosuke Shibata, Aki Torii, Hiroyuki Toda, Ryohei Kuramoto, Daiki Fukuda, Takuya Hirano

Physical Review A, 104(4), Oct 28, 2021 Peer-reviewedCorresponding author
Quantum lock-in detection of a vector light shift

Kosuke Shibata, Naota Sekiguchi, Takuya Hirano

Physical Review A, 103(4), Apr 30, 2021 Peer-reviewedLead authorCorresponding author
Compensation of gravity on cold atoms by a linear optical potential

Kosuke Shibata, Hidehiko Ikeda, Ryota Suzuki, Takuya Hirano

Physical Review Research, 2(1), Jan 23, 2020 Peer-reviewed
Faraday patterns generated by Rabi oscillation in a binary Bose-Einstein condensate

Terun Chen, Kosuke Shibata, Yujiro Eto, Takuya Hirano, Hiroki Saito

Physical Review A, 100(6), Dec 5, 2019 Peer-reviewed
Dissipation-Assisted Coherence Formation in a Spinor Quantum Gas

Yujiro Eto, Hitoshi Shibayama, Kosuke Shibata, Aki Torii, Keita Nabeta, Hiroki Saito, Takuya Hirano

Physical Review Letters, 122(24), Jun 21, 2019 Peer-reviewed
Interaction modulation in a long-lived Bose-Einstein condensate by rf coupling

Kosuke Shibata, Aki Torii, Hitoshi Shibayama, Yujiro Eto, Hiroki Saito, Takuya Hirano

Physical Review A, 99(1), Jan 24, 2019 Peer-reviewedLead author
Loading of atoms into an optical trap with high initial phase-space density

Kosuke Shibata, Shota Yonekawa, Satoshi Tojo

PHYSICAL REVIEW A, 96(1) 013402-1-013402-6, Jul, 2017 Peer-reviewed
Excitation enhancement in electric multipole transitions near a nanoedge

Kosuke Shibata, Satoshi Tojo, Daniel Bloch

OPTICS EXPRESS, 25(8) 9476-9489, Apr, 2017 Peer-reviewed
Phase separation dynamics of two-component bose-einstein condensates in various optical trap shapes

Shibayama H, Torii A, Shibata K, Eto Y, Saito H, Hirano T

Optics InfoBase Conference Papers, Part F78-JSAP 2017, 2017 Peer-reviewed
Laser spectroscopic probing of coexisting superfluid and insulating states of an atomic Bose–Hubbard system

Shinya Kato, Kensuke Inaba, Seiji Sugawa, Kosuke Shibata, Ryuta Yamamoto, Makoto Yamashita, Yoshiro Takahashi

Nature Communications, 7(1), Sep, 2016 Peer-reviewed
Optical spectral imaging of a single layer of a quantum gas with an ultranarrow optical transition

Kosuke Shibata, Ryuta Yamamoto, Yu Seki, Yoshiro Takahashi

Physical Review A, 89(3), Mar 25, 2014 Peer-reviewed
High-Sensitivity In situ Fluorescence Imaging of Ytterbium Atoms in a Two-Dimensional Optical Lattice with Dual Optical Molasses

Kosuke Shibata, Ryuta Yamamoto, Yoshiro Takahashi

Journal of the Physical Society of Japan, 83(1) 014301-014301, Jan 15, 2014 Peer-reviewed
Control of resonant interaction between electronic ground and excited states

S. Kato, S. Sugawa, K. Shibata, R. Yamamoto, Y. Takahashi

Physical Review Letters, 110(17) 173201-1-173201-5, Apr, 2013 Peer-reviewed
Observation of long-lived van der Waals molecules in an optical lattice

Shinya Kato, Rekishu Yamazaki, Kosuke Shibata, Ryuta Yamamoto, Hirotaka Yamada, Yoshiro Takahashi

Physical Review A - Atomic, Molecular, and Optical Physics, 86(4), Oct 8, 2012 Peer-reviewed
Optical magnetic resonance imaging with an ultra-narrow optical transition

S. Kato, K. Shibata, R. Yamamoto, Y. Yoshikawa, Y. Takahashi

Applied Physics B, 108(1) 31-38, Jul, 2012 Peer-reviewed
A scalable quantum computer with ultranarrow optical transition of ultracold neutral atoms in an optical lattice

K. Shibata, S. Kato, A. Yamaguchi, S. Uetake, Y. Takahashi

Applied Physics B, 97(4) 753-758, Dec, 2009 Peer-reviewed
Fictitious magnetic resonance by quasielectrostatic field

J. Kobayashi, K. Shibata, T. Aoki, M. Kumakura, Y. Takahashi

Applied Physics B, 95(2) 361-365, May, 2009 Peer-reviewed

Major Misc.

Optical spectral imaging of a single layer of a quantum gas with an ultranarrow optical transition

Kosuke Shibata, Ryuta Yamamoto, Yu Seki, Yoshiro Takahashi

PHYSICAL REVIEW A, 89(3), Mar, 2014
High-Sensitivity In situ Fluorescence Imaging of Ytterbium Atoms in a Two-Dimensional Optical Lattice with Dual Optical Molasses

Kosuke Shibata, Ryuta Yamamoto, Yoshiro Takahashi

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 83(1), Jan, 2014

Presentations

スピン２ボース・アインシュタイン凝縮体の連続撮像Ⅱ

柴田康介

日本物理学会2018年秋季大会, Sep, 2018
ラビ結合した２成分ボース・アインシュタイン凝縮体の相分離ダイナミクス

柴田康介

日本物理学会第73回年次大会(2018年), Mar, 2018
Phase separation of Rabi-coupled spin states in an 87Rb F = 1 BEC

SHIBATA Kosuke

JSAP-OSA Joint Symposia 2017, Sep, 2017
Rb原子の光モラセスから光トラップへの高効率ローディング

柴田康介

日本物理学会, Mar, 2017
低次元¹⁷¹Yb-¹⁷⁴Yb混合気体の高感度観測

日本物理学会講演, 2014

Professional Memberships

Works

原子の高空間分解制御および近接場技術の駆使による中性原子ナノ格子系の実現

Sep, 2014

Research Projects

ボース凝縮体を用いた連続的量子非破壊測定の研究

科学研究費助成事業, 日本学術振興会, Apr, 2022 - Mar, 2025

柴田康介
Study of a homogeneous spinor BEC

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2019 - Mar, 2022

Shibata Kosuke
サブマイクロスケール量子気体操作技術の応用に基づく集積原子波回路の実現

国内研究助成研究奨励, 公益財団法人旭硝子財団, Apr, 2017 - Mar, 2019

柴田康介
２重に量子雑音を圧搾した量子原子磁力計の開発

光・量子飛躍フラッグシッププログラム, 文部科学省, Nov, 2018

柴田康介
Non-equilibrium Dynamics in Multi-component Bose-Einstein Condensates

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Jun, 2013 - Mar, 2018

Hirano Takuya, TAKAHASHI Masahiro, ETO Yujiro, SHIBATA Kosuke

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