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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…
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…