Statistical physics on thermoelectricity and thermodynamic phenomena

• Project/Area Number: 26400404
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Mathematical physics/Fundamental condensed matter physics
• Research Institution: Keio University
• Principal Investigator: Saito Keiji 慶應義塾大学, 理工学部(矢上), 准教授 (90312983)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 非平衡熱力学 / 熱電機関 / 熱機関 / 非平衡物理学 / 熱効率 / 仕事率 / 非平衡統計物理学 / 非平衡統計力学

Outline of Final Research Achievements

Thermoelectric phenomenon is a phenomenon in which current flows simultaneously when heat flows by connecting conductors that allow electrons to flow through a thermal bath of different temperature. Thermoelectric conversion can be regarded as a typical heat engine because heat is converted to current and its current can work in the outside world. In this research, we discussed the thermodynamic efficiency and the power that are applicable to a wide range of heat engine including thermoelectric conversion. Considering the Nernst effect caused by the magnetic field and a small heat engine realized by manipulating colloidal particles, we derived a universal trade-off relation between efficiency and power.

Research Products

• [Int'l Joint Research] ICTS(インド)
• [Int'l Joint Research] シュツットガルト大学(ドイツ)
• [Journal Article] Waiting for rare entropic fluctuations (2016)
  • Author(s): Keiji Saito and Abhishek Dhar
  • Journal Title: Europhysics Letters Volume: 114 Issue: 5 Pages: 50004-50004
  • DOI: 10.1209/0295-5075/114/50004
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Universal trade-off relation between power and efficiency for heat engines (2016)
  • Author(s): Naoto Shiraishi, Keiji Saito and Hal Tasaki
  • Journal Title: Physical Review Letters Volume: 117 Issue: 19 Pages: 190601-190601
  • DOI: 10.1103/physrevlett.117.190601
  • NAID: 130007472164
  • Peer Reviewed
• [Journal Article] Universal Fluctuations of Single-Particle Diffusivity in Quenched Environment (2016)
  • Author(s): Takuma Akimoto, Eli Barkai, Keiji Saito
  • Journal Title: Physical Review Letters Volume: 117 Issue: 18 Pages: 180602-180602
  • DOI: 10.1103/physrevlett.117.180602
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Floquet-Magnus Theory and Generic Transient Dynamics in Periodically Driven Many-Body Quantum Systems (2016)
  • Author(s): Tomotaka Kuwahara, Takashi Mori and Keiji Saito
  • Journal Title: Annals of Physics Volume: 367 Pages: 96-124
  • DOI: 10.1016/j.aop.2016.01.012
  • Peer Reviewed
• [Journal Article] Rigorous bound on energy absorption and generic relaxation in periodically driven quantum systems (2016)
  • Author(s): Takashi Mori, Tomotaka Kuwahara, and Keiji Saito
  • Journal Title: Physical Review Letters Volume: 116 Issue: 12 Pages: 120401-120401
  • DOI: 10.1103/physrevlett.116.120401
  • Peer Reviewed
• [Journal Article] Thermodynamics of Micro- and Nano-Systems Driven by Periodic Temperature Variations (2015)
  • Author(s): Kay Brandner, Keiji Saito, and Udo Seifert
  • Journal Title: Phys. Rev. X Volume: 5 Issue: 3
  • DOI: 10.1103/physrevx.5.031019
  • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Numerical test of hydrodynamic fluctuation theory in the Fermi-Pasta-Ulam chain (2014)
  • Author(s): Suman G. Das, Abhishek Dhar, Keiji Saito, Christian B. Mendl, Herbert Spohn
  • Journal Title: Physical Review E Volume: 90 Issue: 1
  • DOI: 10.1103/physreve.90.012124
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] A Classical Nernst Engine (2014)
  • Author(s): Julian Stark, Kay Brandner, Keiji Saito, Udo Seifert
  • Journal Title: Physical Review Letters Volume: 112 Issue: 14
  • DOI: 10.1103/physrevlett.112.140601
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Presentation] Energy current fluctuations based on fluctuating hydrodynamic theory (2017)
  • Author(s): Keiji Saito
  • Organizer: Physical and mathematical approaches to interacting particle systems: In honer of 70th birthday of Herbert Spohn
  • Place of Presentation: 東京工業大学（東京都目黒区）
  • Year and Date: 2017-01-11
  • Int'l Joint Research / Invited
• [Presentation] 熱効率と仕事率をめぐって：熱力学の基礎を固める観点から (2017)
  • Author(s): 齊藤圭司
  • Organizer: 第5回理研シンポジウム２０１7 明るい未来の光熱エネルギー
  • Place of Presentation: 理化学研究所 （埼玉和光市）
  • Invited
• [Presentation] Universal trade-off relation between power and efficiency for heat to work conversion (2016)
  • Author(s): Keiji Saito, Naoto Shiraishi and Hal Tasaki
  • Organizer: Thermal and electronic transport in nanostructures
  • Place of Presentation: Natal, (Brasil)
  • Year and Date: 2016-10-31
  • Int'l Joint Research / Invited
• [Presentation] Trade-off relation between power and efficiency for heat engines (2016)
  • Author(s): Keiji Saito, Naoto Shiraishi and Hal Tasaki
  • Organizer: Nonequilibrium processes at the nanoscale
  • Place of Presentation: Beijing (china)
  • Year and Date: 2016-07-25
  • Int'l Joint Research / Invited
• [Presentation] 低次元系での異常熱輸送現象の理論 (2016)
  • Author(s): 齊藤圭司
  • Organizer: 日本物理学会第71回年次大会
  • Place of Presentation: 東北学院大学（宮城県・仙台市）
  • Year and Date: 2016-03-21
  • Invited
• [Presentation] Rigorous bound on energy absorption in periodically driven many-body quantum systems (2015)
  • Author(s): Keiji Saito, Tomotaka Kuwahara, and Takashi Mori
  • Organizer: Non-equilibrium Statistical Physics
  • Place of Presentation: ICTS, Bangalore (India)
  • Year and Date: 2015-11-12
  • Int'l Joint Research
• [Presentation] Waiting for entropic fluctuations in stochastic thermodynamics (2015)
  • Author(s): Keiji Saito, Abhishek Dhar
  • Organizer: Long-term workshop on "New Frontiers in Non-equilibrium Physics 2015
  • Place of Presentation: 基礎物理学研究所（京都府・京都市）
  • Year and Date: 2015-07-30
  • Int'l Joint Research
• [Presentation] Kondo signature in heat transfer (2015)
  • Author(s): Keiji Saito
  • Organizer: The 9th International Conference on Computational Physics
  • Place of Presentation: Singapore
  • Year and Date: 2015-01-07 – 2015-01-11
  • Invited
• [Presentation] Several mysteries in low-dimensional heat transport (2014)
  • Author(s): Keiji Saito
  • Organizer: Thermodynamics, Large deviation and Transportation
  • Place of Presentation: 基礎物理学研究所
  • Year and Date: 2014-09-17 – 2014-09-18
  • Invited
• [Presentation] Kondo-signature in heat transfer via local two-state (2014)
  • Author(s): Keiji Saito
  • Organizer: Advances in Non Equilibrium Statistical Mechanics
  • Place of Presentation: Florence (Italy)
  • Year and Date: 2014-05-26 – 2014-05-27
  • Invited
• [Remarks] 齊藤圭司のホームページ
  • URL: http://www.phys.keio.ac.jp/faculty/ksaito/syousai/index-saito.html