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Local Harmonic Approximation to Quantum Mean Force Gibbs State
Prem Kumar
When the strength of interaction between a quantum system and bath is non-negligible, the equilibrium state can deviate from the Gibbs state. But the expression of such a mean forc…
Asymptotic TCL4 Generator for the Spin-Boson Model: Analytical Derivation and Benchmarking
Prem Kumar, K. P. Athulya, Sibasish Ghosh
The spin-boson model is a widely used model for understanding the properties of a two-level open quantum system. Accurately describing its dynamics often requires going beyond the…
Equivalence between the second order steady state for the spin-Boson model and its quantum mean force Gibbs state
Prem Kumar, K. P. Athulya, Sibasish Ghosh
When the coupling of a quantum system to its environment is non-negligible, its steady state is known to deviate from the textbook Gibbs state. The Bloch-Redfield quantum master eq…
Ultrastrong coupling limit to quantum mean force Gibbs state for anharmonic environment
Prem Kumar, Sibasish Ghosh
The equilibrium state of a quantum system can deviate from the Gibbs state if the system-environment (SE) coupling is not weak. An analytical expression for this mean force Gibbs s…