A state of an open quantum system is described by a density matrix, whose dynamics is
governed by a Liouvillian superoperator. Within a general framework, we explore …

Exceptional points (EPs) are degeneracies of classical and quantum open systems, which
are studied in many areas of physics including optics, optoelectronics, plasmonics, and …

We study an array of coupled optical cavities in the presence of two-photon driving and
dissipation. The system displays a critical behavior similar to that of a quantum Ising model …

We investigate and characterize the emergence of finite-component dissipative phase
transitions (DPTs) in nonlinear photon resonators subject to $ n $-photon driving and …

The paradigm of second-order phase transitions (PTs) induced by spontaneous symmetry
breaking (SSB) in thermal and quantum systems is a pillar of modern physics that has been …

In driven-dissipative systems, the presence of a strong symmetry guarantees the existence
of several steady states belonging to different symmetry sectors. Here we show that when a …

We present an inference method utilizing artificial neural networks for parameter estimation
of a quantum probe monitored through a single continuous measurement. Unlike existing …

We investigate the occurrence of a phase transition, characterized by the spontaneous
breaking of a discrete symmetry, in a driven-dissipative Bose-Hubbard lattice in the …

Phase transitions of thermal systems and the laser threshold were first connected more than
forty years ago. Despite the nonequilibrium nature of the laser, the Landau theory of thermal …

We introduce the notion of steady-state quantum chaos as a general phenomenon in open
quantum many-body systems. Classifying an isolated or open quantum system as integrable …