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Hsiang, J. S., & Hu, B. L. (2020). Fluctuation-dissipation relation for open quantum systems in a nonequilibrium steady state. Physical Review D, 102. http://doi.org/10.1103/PhysRevD.102.105006
Hsiang, J. S., & Hu, B. L. (2021). Fluctuation-dissipation relation for a quantum Brownian oscillator in a parametrically squeezed thermal field. Annals of Physics, 433. http://doi.org/10.1016/j.aop.2021.168594
Hsiang, J. S., & Hu, B. L. (2021). Zeroth law in quantum thermodynamics at strong coupling: In equilibrium, not at equal temperature. Physical Review D, 103. http://doi.org/10.1103/PhysRevD.103.085004