Keldysh field theory for driven open quantum systems
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 …
light-driven semiconductors to microcavity arrays—move systems into the focus which are …
Simulation methods for open quantum many-body systems
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 …
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
Interacting many-body systems display enhanced sensitivity close to critical transition points
due to diverging quantum fluctuations. This criticality-based enhancement has been …
due to diverging quantum fluctuations. This criticality-based enhancement has been …
Geometry of quantum phase transitions
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 …
quantum phase transitions and non-equilibrium dissipative phase transitions. After a …
Multistability in Physical and Living Systems
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 …
coexistence of stable states (attractors) for the same set of system parameters. The …
Real-time near-field terahertz imaging with atomic optical fluorescence
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 …
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
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 …
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 quantum many-body systems. It is based on the variational minimization of a …
Dissipative time crystal in a strongly interacting Rydberg gas
The notion of spontaneous symmetry breaking has been well established to characterize
classical and quantum phase transitions of matter, such as condensation, crystallization or …
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 …
models which are nevertheless much less explored than their dissipationless counterparts …