Keldysh field theory for driven open quantum systems

LM Sieberer, M Buchhold, S Diehl - Reports on Progress in …, 2016 - iopscience.iop.org
Recent experimental developments in diverse areas—ranging from cold atomic gases to
light-driven semiconductors to microcavity arrays—move systems into the focus which are …

Simulation methods for open quantum many-body systems

H Weimer, A Kshetrimayum, R Orús - Reviews of Modern Physics, 2021 - APS
Coupling a quantum many-body system to an external environment dramatically changes its
dynamics and offers novel possibilities not found in closed systems. Of special interest are …

Enhanced metrology at the critical point of a many-body Rydberg atomic system

DS Ding, ZK Liu, BS Shi, GC Guo, K Mølmer… - Nature Physics, 2022 - nature.com
Interacting many-body systems display enhanced sensitivity close to critical transition points
due to diverging quantum fluctuations. This criticality-based enhancement has been …

Geometry of quantum phase transitions

A Carollo, D Valenti, B Spagnolo - Physics Reports, 2020 - Elsevier
In this article we provide a review of geometrical methods employed in the analysis of
quantum phase transitions and non-equilibrium dissipative phase transitions. After a …

Multistability in Physical and Living Systems

AN Pisarchik, AE Hramov - Cham: Springer, 2022 - Springer
Multistability is ubiquitous in nature. From a mathematical point of view, multistability is the
coexistence of stable states (attractors) for the same set of system parameters. The …

Real-time near-field terahertz imaging with atomic optical fluorescence

CG Wade, N Šibalić, NR De Melo, JM Kondo… - Nature …, 2017 - nature.com
Terahertz (THz) near-field imaging is a flourishing discipline 1, 2, with applications from
fundamental studies of beam propagation 3 to the characterization of metamaterials 4, 5 and …

Discrete time crystals in the absence of manifest symmetries or disorder in open quantum systems

FM Gambetta, F Carollo, M Marcuzzi, JP Garrahan… - Physical review …, 2019 - APS
We establish a link between metastability and a discrete time-crystalline phase in a
periodically driven open quantum system. The mechanism we highlight requires neither the …

Variational principle for steady states of dissipative quantum many-body systems

H Weimer - Physical review letters, 2015 - APS
We present a novel generic framework to approximate the nonequilibrium steady states of
dissipative quantum many-body systems. It is based on the variational minimization of a …

Dissipative time crystal in a strongly interacting Rydberg gas

X Wu, Z Wang, F Yang, R Gao, C Liang, MK Tey, X Li… - Nature Physics, 2024 - nature.com
The notion of spontaneous symmetry breaking has been well established to characterize
classical and quantum phase transitions of matter, such as condensation, crystallization or …

Nonequilibrium many-body steady states via Keldysh formalism

MF Maghrebi, AV Gorshkov - Physical Review B, 2016 - APS
Many-body systems with both coherent dynamics and dissipation constitute a rich class of
models which are nevertheless much less explored than their dissipationless counterparts …