Quantum fluctuations and correlations in open quantum Dicke models
arXiv:2110.13191 · doi:10.1103/PhysRevA.106.012212
Abstract
In the vicinity of ground-state phase transitions quantum correlations can display non-analytic behavior and critical scaling. This signature of emergent collective effects has been widely investigated within a broad range of equilibrium settings. However, under nonequilibrium conditions, as found in open quantum many-body systems, characterizing quantum correlations near phase transitions is challenging. Moreover, the impact of local and collective dissipative processes on quantum correlations is not broadly understood. This is, however, indispensable for the exploitation of quantum effects in technological applications, such as sensing and metrology. Here we consider as a paradigmatic setting the superradiant phase transition of the open quantum Dicke model and characterize quantum and classical correlations across the phase diagram. We develop an approach to quantum fluctuations which allows us to show that local dissipation, which cannot be treated within the commonly employed Holstein-Primakoff approximation, rather unexpectedly leads to an enhancement of collective quantum correlations, and to the emergence of a nonequilibrium superradiant phase in which the bosonic and spin degrees of freedom of the Dicke model are entangled.
arXiv comment18 pages, 4 figures
References in corpus (41)
- A computable measure of entanglement
- Introducing Quantum Discord
- Classical, quantum and total correlations
- Peres-Horodecki separability criterion for continuous variable systems
- The logarithmic negativity: A full entanglement monotone that is not convex
- Chaos and the Quantum Phase Transition in the Dicke Model
- Entanglement in continuous variable systems: Recent advances and current perspectives
- Keldysh Field Theory for Driven Open Quantum Systems
- Quantum Chaos Triggered by Precursors of a Quantum Phase Transition: The Dicke Model
- Quantum versus classical correlations in Gaussian states
- Gaussian quantum discord
- Entanglement and the Phase Transition in Single Mode Superradiance
- Quantum enhanced measurements without entanglement
- Introduction to the Dicke model: from equilibrium to nonequilibrium, and vice versa
- Cavity QED with Quantum Gases: New Paradigms in Many-Body Physics
- Keldysh approach for non-equilibrium phase transitions in quantum optics: beyond the Dicke model in optical cavities
- Open quantum systems with local and collective incoherent processes: Efficient numerical simulation using permutational invariance
- Breakdown of gauge invariance in ultrastrong-coupling cavity QED
- Finite-Size Scaling Exponents in the Dicke Model
- Spin squeezing, entanglement and quantum metrology with Bose-Einstein condensates
- Suppressing and restoring the Dicke superradiance transition by dephasing and decay
- Entanglement and Entropy in a Spin-Boson Quantum Phase Transition
- Dissipation Induced Nonstationarity in a Quantum Gas
- Entanglement entropy in collective models
- Universality of the negativity in the Lipkin-Meshkov-Glick model
- Exactness of mean-field equations for open Dicke models with an application to pattern retrieval dynamics
- Enhancing associative memory recall and storage capacity using confocal cavity QED
- Dynamical phases and quantum correlations in an emitter-waveguide system with feedback
- Certifying Separability in Symmetric Mixed States, and Superradiance
- Uniqueness of the Phase Transition in Many-Dipole Cavity Quantum Electrodynamical Systems
- Quantum spin chain dissipative mean-field dynamics
- Cooperative Breakdown of the Oscillator Blockade in the Dicke Model
- Control of multiatom entanglement in a cavity
- Effects of Spin-Orbit Coupling on Jaynes-Cummings and Tavis-Cummings Models
- Driven-dissipative Ising Model: An exact field-theoretical analysis
- Dissipative Entanglement of Quantum Spin Fluctuations
- Quantum Fluctuations in Mesoscopic Systems
- Robust quantum correlations in out-of-equilibrium matter-light systems
- Dissipative Dynamics of Quantum Fluctuations
- Environment induced entanglement in many-body mesoscopic systems
- Large dynamic light-matter entanglement from driving neither too fast nor too slow
Cited by in corpus (17)
- Out-of-equilibrium dynamics of quantum many-body systems with long-range interactions
- Optomechanical-interface-induced strong spin-magnon coupling
- Entangled time-crystal phase in an open quantum light-matter system
- Collective dynamics of the unbalanced three-level Dicke model
- Long-range interacting systems are locally non-interacting
- Breakdown of the Quantum Distinction of Regular and Chaotic Classical Dynamics in Dissipative Systems
- Quantum Fluctuation Dynamics of Dispersive Superradiant Pulses in a Hybrid Light-Matter System
- Non-Gaussian dynamics of quantum fluctuations and mean-field limit in open quantum central spin systems
- Theory of magnon-polaritons in quantum Ising materials
- Theory of parametric resonance for discrete time crystals in fully-connected spin-cavity systems
- Designing open quantum systems for enabling quantum enhanced sensing through classical measurements
- Symmetries & Correlations in Continous Time Crystals
- Lee-Yang theory of the superradiant phase transition in the open Dicke model
- Analysis of chaos and regularity in the open Dicke model
- Generation of entanglement and non-stationary states via competing coherent and incoherent bosonic hopping
- Thermodynamics of coupled time crystals with an application to energy storage
- Genuine -partite correlations and entanglement in the ground state of the Dicke model for interacting qubits