22 citations · 78 across the 7 of their papers we have counts for
7 papers
Quantum Hierarchical Fokker-Planck Equations with U(1) Gauge Fields (U(1)-QHFPE): A Computational Framework for Aharonov-Bohm Effects
Shoki Koyanagi, Hyeonseok Yang, Yoshitaka Tanimura
We introduce U(1)-QHFPE, a non-Markovian and non-perturbative open quantum dynamics software package for solving quantum Fokker-Planck equations incorporating gauge fields within t…
Thermodynamic quantum Fokker-Planck equations and their application to thermostatic Stirling engine
Shoki Koyanagi, Yoshitaka Tanimura
We developed a computer code for the thermodynamic quantum Fokker-Planck equations (T-QFPE), derived from a thermodynamic system-bath model. This model consists of an anharmonic su…
Hierarchical equations of motion for multiple baths (HEOM-MB) and their application to Carnot cycle
Shoki Koyanagi, Yoshitaka Tanimura
We have developed a computer code for the thermodynamic hierarchical equations of motion derived from a spin subsystem coupled to multiple Drude baths at different temperatures, wh…
Classical and quantum thermodynamics described as a system-bath model: The dimensionless minimum work principle
Shoki Koyanagi, Yoshitaka Tanimura
We formulate a thermodynamic theory applicable to both classical and quantum systems. These systems are depicted as thermodynamic system-bath models capable of handling isothermal,…
Classical and quantum thermodynamics in a non-equilibrium regime: Application to Stirling engine
Shoki Koyanagi, Yoshitaka Tanimura
We have developed a thermodynamic theory in the non-equilibrium regime, which we describe as a thermodynamic system-bath model [S. Koyanagi and Y. Tanimura, J. Chem. Phys. \textbf{…
The laws of thermodynamics for quantum dissipative systems: A quasi-equilibrium Helmholtz energy approach
Shoki Koyanagi, Yoshitaka Tanimura
Using the quasi-equilibrium Helmholtz energy (qHE), defined as the thermodynamic work in a quasi-static process, we investigate the thermal properties of both an isothermal process…
Numerically "exact" simulations of a quantum Carnot cycle: Analysis using thermodynamic work diagrams
Shoki Koyanagi, Yoshitaka Tanimura
We investigate the efficiency of a quantum Carnot engine based on open quantum dynamics theory. The model includes time-dependent external fields for the subsystems controlling the…