In the framework of the theory of open quantum systems, we derive quantum master
equations for the ultrastrong system-bath coupling regime and, more generally, the strong …

Optimization is one of the key applications of quantum computing where a quantum
speedup has been an eagerly anticipated outcome. A promising approach to optimization …

Despite recent advances in quantum sciences, a quantum master equation that accurately
and simply characterizes open quantum dynamics across extremely long timescales and in …

Underlying the classical thermodynamic principles are analogous microscopic laws, arising
from the fundamental axioms of quantum mechanics. These define quantum thermodynamic …

The Hamiltonian of mean force is a widely used concept to describe the modification of the
usual canonical Gibbs state for a quantum system whose coupling strength with the thermal …

Quantum master equations are commonly used to model the dynamics of open quantum
systems, but their accuracy is rarely compared with the analytical solution of exactly solvable …

Understanding nonsecular dynamics in open quantum systems is addressed here, with
emphasis on systems with large numbers of Bohr frequencies, zero temperature, and fast …

In recent years, there has been tremendous focus on identifying whether effective
descriptions of open quantum systems such as master equations can accurately describe …

A dynamical symmetry is employed to determine the structure of the quantum non-
Markovian time-local master equation. Such a structure is composed from two components …

Quantum dynamics of driven open systems should be compatible with both quantum
mechanic and thermodynamic principles. By formulating the thermodynamic principles in …