Exploring dynamical phase transitions with cold atoms in an optical cavity
Sign Up to like & getrecommendations! Published in 2020 at "Nature"
DOI: 10.1038/s41586-020-2224-x
Abstract: Interactions between atoms and light in optical cavities provide a means of investigating collective (many-body) quantum physics in controlled environments. Such ensembles of atoms in cavities have been proposed for studying collective quantum spin models,… read more here.
Keywords: atoms optical; phase transitions; cavity; dynamical phase ... See more keywords
Sampling rare events across dynamical phase transitions.
Sign Up to like & getrecommendations! Published in 2019 at "Chaos"
DOI: 10.1063/1.5091669
Abstract: Interacting particle systems with many degrees of freedom may undergo phase transitions to sustain atypical fluctuations of dynamical observables such as the current or the activity. In some cases, this leads to symmetry-broken space-time trajectories… read more here.
Keywords: phase; events across; phase transitions; sampling rare ... See more keywords
Observation of dynamical phase transitions in a topological nanomechanical system
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review B"
DOI: 10.1103/physrevb.100.024310
Abstract: Here, the authors present a novel scheme to study dynamical phase transitions (DPTs) from topological edge states in the Su-Schrieffer-Heeger model. They utilize eight coupled nanomechanical oscillators to simulate the quantum quenches and observe DPTs… read more here.
Keywords: dynamical phase; transitions topological; phase transitions; observation dynamical ... See more keywords
Anomalous dynamical phase in quantum spin chains with long-range interactions
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review B"
DOI: 10.1103/physrevb.96.104436
Abstract: The existence or absence of nonanalytic cusps in the Loschmidt-echo return rate is traditionally employed to distinguish between a regular dynamical phase (regular cusps) and a trivial phase (no cusps) in quantum spin chains after… read more here.
Keywords: phase; quantum spin; long range; spin chains ... See more keywords
Large deviations in chaotic systems: Exact results and dynamical phase transition.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.106.l042202
Abstract: Large deviations in chaotic dynamics have potentially significant and dramatic consequences. We study large deviations of series of finite lengths N generated by chaotic maps. The distributions generally display an exponential decay with N, associated… read more here.
Keywords: deviations chaotic; large deviations; phase transition; dynamical phase ... See more keywords
Delocalization-localization dynamical phase transition of random walks on graphs.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.107.024126
Abstract: We consider random walks evolving on two models of connected and undirected graphs and study the exact large deviations of a local dynamical observable. We prove, in the thermodynamic limit, that this observable undergoes a… read more here.
Keywords: delocalization; phase transition; dynamical phase; random walks ... See more keywords
Geometrical interpretation of dynamical phase transitions in boundary-driven systems.
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review E"
DOI: 10.1103/physreve.96.062108
Abstract: Dynamical phase transitions are defined as nonanalytic points of the large deviation function of current fluctuations. We show that for boundary-driven systems, many dynamical phase transitions can be identified using the geometrical structure of an… read more here.
Keywords: driven systems; geometrical interpretation; boundary driven; phase transitions ... See more keywords
Chaotic Dynamical Ferromagnetic Phase Induced by Nonequilibrium Quantum Fluctuations.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.120.130603
Abstract: We investigate the robustness of a dynamical phase transition against quantum fluctuations by studying the impact of a ferromagnetic nearest-neighbor spin interaction in one spatial dimension on the nonequilibrium dynamical phase diagram of the fully… read more here.
Keywords: phase; quantum fluctuations; dynamical ferromagnetic; dynamical phase ... See more keywords
Dynamical Phase Transitions to Optomechanical Superradiance.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review letters"
DOI: 10.1103/physrevlett.123.053601
Abstract: We theoretically analyze superradiant emission of light from an ultracold gas of bosonic atoms confined in a bad cavity. A metastable dipolar transition of the atoms couples to the cavity field and is incoherently pumped,… read more here.
Keywords: dynamical phase; optomechanical superradiance; phase transitions; transitions optomechanical ... See more keywords
Dynamical Phase Transition from Nonequilibrium Dynamics of Dark Solitons.
Sign Up to like & getrecommendations! Published in 2020 at "Physical review letters"
DOI: 10.1103/physrevlett.124.031601
Abstract: By holographic duality, we identify a novel dynamical phase transition which results from the temperature dependence of nonequilibrium dynamics of dark solitons in a superfluid. For a nonequilibrium superfluid system with an initial density of… read more here.
Keywords: dynamical phase; phase transition; nonequilibrium dynamics; phase ... See more keywords
Dynamical Phase Transitions in Dissipative Quantum Dynamics with Quantum Optical Realization.
Sign Up to like & getrecommendations! Published in 2020 at "Physical review letters"
DOI: 10.1103/physrevlett.125.143602
Abstract: We study dynamical phase transitions (DPT) in the driven and damped Dicke model, realizable for example by a driven atomic ensemble collectively coupled to a damped cavity mode. These DPTs are characterized by nonanalyticities of… read more here.
Keywords: dynamical phase; dissipative quantum; phase transitions; quantum dynamics ... See more keywords