Unifying scrambling, thermalization and entanglement through measurement of fidelity out-of-time-order correlators in the Dicke model
Sign Up to like & getrecommendations! Published in 2019 at "Nature Communications"
DOI: 10.1038/s41467-019-09436-y
Abstract: Scrambling is the process by which information stored in local degrees of freedom spreads over the many-body degrees of freedom of a quantum system, becoming inaccessible to local probes and apparently lost. Scrambling and entanglement… read more here.
Keywords: thermalization; dicke model; time order; order correlators ... See more keywords
Dispersive Regimes of the Dicke Model
Sign Up to like & getrecommendations! Published in 2017 at "Scientific Reports"
DOI: 10.1038/s41598-017-09110-7
Abstract: We study two dispersive regimes of the Dicke model in the dynamics of N two-level atoms interacting with a bosonic mode for long interaction times. Firstly, we analyze the model for the regime in which the… read more here.
Keywords: mode; dicke model; dispersive regimes; regimes dicke ... See more keywords
Dissipation-induced bistability in the two-photon Dicke model
Sign Up to like & getrecommendations! Published in 2020 at "Scientific Reports"
DOI: 10.1038/s41598-020-69704-6
Abstract: The Dicke model is a paradigmatic quantum-optical model describing the interaction of a collection of two-level systems with a single bosonic mode. Effective implementations of this model made it possible to observe the emergence of… read more here.
Keywords: phase; two photon; dicke model; dissipation ... See more keywords
Two-mode Dicke model from nondegenerate polarization modes
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review A"
DOI: 10.1103/physreva.100.013816
Abstract: We realize a non-degenerate two-mode Dicke model with competing interactions in a Bose-Einstein condensate (BEC) coupled to two orthogonal polarization modes of a single optical cavity. The BEC is coupled to the cavity modes via… read more here.
Keywords: dicke model; two mode; mode; polarization modes ... See more keywords
Finite-size scaling analysis in the two-photon Dicke model
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review A"
DOI: 10.1103/physreva.97.053821
Abstract: The Hamiltonian of the two-photon Dicke model is diagonalized for the normal phase and super-radiant phase beyond the mean-field method respectively, giving the critical coupling strength. Besides a spectral collapse, the super-radiant phase transition is… read more here.
Keywords: two photon; dicke model; finite size; photon dicke ... See more keywords
Effect of system energy on quantum signatures of chaos in the two-photon Dicke model.
Sign Up to like & getrecommendations! Published in 2019 at "Physical review. E"
DOI: 10.1103/physreve.100.022207
Abstract: We have studied entanglement entropy and Husimi Q distribution as a tool to explore chaos in the quantum two-photon Dicke model. With the increase of the energy of a system, the linear entanglement entropy of… read more here.
Keywords: system; two photon; dicke model; photon dicke ... See more keywords
Switchable selective interactions in a Dicke model with a driven biased term.
Sign Up to like & getrecommendations! Published in 2022 at "Physical review. E"
DOI: 10.1103/physreve.105.034125
Abstract: In this work, we propose a method to investigate controllable qubit-resonator interactions in a Dicke model with driven biased term. The nonlinearity of the spectrum, which can be induced by qubit-resonator interactions, plays an important… read more here.
Keywords: dicke model; biased term; driven biased; interactions dicke ... See more keywords
Observation of Ultrastrong Spin-Motion Coupling for Cold Atoms in Optical Microtraps.
Sign Up to like & getrecommendations! Published in 2018 at "Physical review letters"
DOI: 10.1103/physrevlett.121.253603
Abstract: We realize a mechanical analogue of the Dicke model, achieved by coupling the spin of individual neutral atoms to their quantized motion in an optical trapping potential. The atomic spin states play the role of… read more here.
Keywords: motion; dicke model; observation ultrastrong; cold atoms ... See more keywords
Cooperative Breakdown of the Oscillator Blockade in the Dicke Model.
Sign Up to like & getrecommendations! Published in 2020 at "Physical review letters"
DOI: 10.1103/physrevlett.125.233602
Abstract: The Dicke model, which describes the coupling of an ensemble of spins to a harmonic oscillator, is known for its superradiant phase transition, which can both be observed in the ground state in a purely… read more here.
Keywords: phase transition; dicke model; model; oscillator ... See more keywords
Delay of Superradiance as a Signature of the Non-Wiener Dynamics of the Generalized Dicke Model
Sign Up to like & getrecommendations! Published in 2019 at "JETP Letters"
DOI: 10.1134/s0021364019020140
Abstract: Delay of a superradiance pulse of an ensemble of identical atoms in a half-excited state has been detected. No such delay has been detected for an ensemble of fully excited atoms. These effects are due… read more here.
Keywords: dicke model; model; delay superradiance; generalized dicke ... See more keywords
Chaos and Thermalization in the Spin-Boson Dicke Model
Sign Up to like & getrecommendations! Published in 2022 at "Entropy"
DOI: 10.3390/e25010008
Abstract: We present a detailed analysis of the connection between chaos and the onset of thermalization in the spin-boson Dicke model. This system has a well-defined classical limit with two degrees of freedom, and it presents… read more here.
Keywords: dicke model; spin boson; thermalization spin; thermalization ... See more keywords