Kyoto Workshop on Quantum Thermodynamics and Stochastic Thermodynamics 2025

Session

Thursday

11 Dec 2025, 09:30

Panasonic Auditorium, Yukawa Hall (Yukawa Institute for Theoretical Physics, Kyoto University)

28. Combining energy efficiency and quantum advantage in cyclic machines

Eric Lutz (University of Stuttgart)

11/12/2025, 09:30

Invited Talk

Energy efficiency and quantum advantage are two important features of quantum devices. I will present an experimental realization that combines both features in a quantum engine coupled to a quantum battery that stores the produced work, using a single ion in a linear Paul trap. The quantum nature of the device is first established by observing nonclassical work oscillations with the number of...

29. Thermodynamics and embedding of generalized Langevin equations

Andreas Dechant (Kyoto University, Graduate School of Science, Department of Physics 1)

11/12/2025, 10:20

Long Talk

For Markovian dynamics, stochastic thermodynamics provides a consistent framework relating macroscopic thermodynamic properties to the properties of individual trajectories under time-reversal. By contrast, for non-Markovian dynamics, where the evolution depends on the history of the process, the definition of time-reversal is ambiguous and there is no established framework of stochastic...

30. Duality between dissipation-coherence trade-off and thermodynamic speed limit for noisy oscillations

Ryuna Nagayama (The University of Tokyo)

11/12/2025, 11:10

Short Talk

We derive two fundamental trade-offs for general stochastic limit cycles in the weak-noise limit based on the thermodynamic uncertainty relation. The first is the dissipation-coherence trade-off, which was numerically conjectured and partially proved by Santolin and Falasco [Phys. Rev. Lett. 135, 057101 (2025)]. This trade-off bounds the entropy production required for one oscillatory period...

31. Scalable superconducting circuit optomechanics with millisecond quantum coherence

Shingo Kono (Niels Bohr Institute)

11/12/2025, 13:30

Invited Talk

Superconducting circuit optomechanics based on vacuum-gap capacitors offers a versatile platform for controlling mechanical oscillators in the quantum regime, yet achieving long coherence and scalability has remained a major challenge. We address these limitations by developing a silicon-etched-trench fabrication technique that reproducibly forms vacuum-gap capacitors incorporating...

32. Stochastic thermodynamics for classical non-Markov jump processes based on the Fourier embedding

Kiyoshi Kanazawa (Kyoto University)

11/12/2025, 14:20

Long Talk

Stochastic thermodynamics explores the thermodynamic structure of small systems based on stochastic processes. However, conventional stochastic thermodynamics has relied on the Markov assumption---the assumption that the system's history dependence is negligible---except for a few specific non-Markov models. Since many real physical phenomena have history dependence, it is important to develop...