We present the reaction-coordinate polaron-transform (RCPT) framework for generating
effective-Hamiltonian models to treat nonequilibrium open quantum systems at strong …

We put forth a new class of quantum master equations that correctly reproduce the
asymptotic state of an open quantum system beyond the infinitesimally weak system-bath …

While strong system-bath coupling produces rich and interesting phenomena, applications
to quantum thermal engines have been so far pointing mainly at detrimental effects. The …

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 …

If a quantum system interacts with the environment, then the Hamiltonian acquires a
correction known as the Lamb-shift term. There are two other corrections to the Hamiltonian …

Generic open quantum systems are notoriously difficult to simulate unless one looks at
specific regimes. In contrast, classical dissipative systems can often be effectively described …

The entanglement entropy of a black hole and that of its Hawking radiation are expected to
follow the so-called Page curve: After an increase in line with Hawking's calculation, it is …

We derive the quantum thermodynamics of quantum Brownian motion from the exact
solution of its reduced density matrix. We start from the total equilibrium thermal state …

We extend and benchmark the recently developed Effective-Hamiltonian (EFFH) method
[PRX Quantum 4, 020307 (2023) 2691-3399 10.1103/PRXQuantum. 4.020307] as an …

We present an analytic approach to treat open quantum systems strongly coupled to multiple
environments via noncommuting system operators: a prime example is a qubit concurrently …