Creation and protection of entanglement in systems out of thermal equilibrium

Abstract

We investigate the creation of entanglement between two quantum emitters interacting with a realistic common stationary electromagnetic field out of thermal equilibrium. In the case of two qubits we show that the absence of equilibrium allows the generation of steady entangled states, which is inaccessible at thermal equilibrium and is realized without any further external action on the two qubits. We first give a simple physical interpretation of the phenomenon in a specific case and then we report a detailed investigation on the dependence of the entanglement dynamics on the various physical parameters involved. Sub- and super-radiant effects are discussed, and qualitative differences in the dynamics concerning both creation and protection of entanglement according to the initial two-qubit state are pointed out.

33 pages, 12 figures, some typos corrected with respect to both the previous arXiv and published versions

References in corpus (13)

• Finite-Time Disentanglement via Spontaneous Emission
• Demonstration of Two-Qubit Algorithms with a Superconducting Quantum Processor
• Non-Markovian effects on the dynamics of entanglement
• Entanglement of two qubits mediated by one-dimensional plasmonic waveguides
• Protecting entanglement via the quantum Zeno effect
• Measurement of the Temperature Dependence of the Casimir-Polder Force
• Secure device-independent quantum key distribution with causally independent measurement devices
• Entanglement dynamics of two independent qubits in environments with and without memory
• Delayed (sudden) birth of entanglement
• New asymptotic behaviour of the surface-atom force out of thermal equilibrium
• Casimir-Lifshitz force out of thermal equilibrium
• Optimal control of entanglement via quantum feedback
• Quantum systems in a stationary environment out of thermal equilibrium

Cited by in corpus (33)

• The role of quantum information in thermodynamics --- a topical review
• Cavity-based architecture to preserve quantum coherence and entanglement
• Autonomous quantum thermal machine for generating steady-state entanglement
• Three-body radiative heat transfer and Casimir-Lifshitz force out of thermal equilibrium for arbitrary bodies
• Entanglement dynamics for uniformly accelerated two-level atoms
• Quantum thermal machines with single nonequilibrium environments
• Steady state entanglement beyond thermal limits
• Steady-state entanglement and coherence of the coupled qubit system in equilibrium and nonequilibrium environments
• Autonomous multipartite entanglement engines
• Quantum thermal machine acting on a many-body quantum system: role of correlations in thermodynamic tasks
• Robust entanglement with 3D nonreciprocal photonic topological insulators
• Otto engine beyond its standard quantum limit
• Heralded generation of maximal entanglement in any dimension via incoherent coupling to thermal baths
• Casimir-Lifshitz force out of thermal equilibrium between dielectric gratings
• Quantum current in dissipative systems
• Non-Markovianity and coherence of a moving qubit inside a leaky cavity
• Improving autonomous thermal entanglement generation using a common reservoir
• Non equilibrium dissipation-driven steady many-body entanglement
• Quantum Correlation Dynamics in Controlled Two-Coupled-Qubit Systems
• Excitation injector in an atomic chain: long-ranged transport and efficiency amplification
• Maximally effcient quantum thermal machines fuelled by nonequilibrium steady states
• Quantum thermalization and vanishing thermal entanglement in the open Jaynes-Cummings model
• Engineering entanglement between resonators by hot environment
• Geometry of local quantum dissipation and fundamental limits to local cooling
• Allowed and Forbidden Bipartite Correlations from Thermal States
• Quantum thermalization and thermal entanglement in the open quantum Rabi model
• Distributed thermal tasks on many-body systems through a single quantum machine
• Impossibility of bosonic autonomous entanglement engines in the weak-coupling limit
• Casimir-Polder force for a polarizable molecule near a dielectric substrate out of thermal equilibrium
• Finite-time dynamics of an entanglement engine: current, fluctuations and kinetic uncertainty relations
• Entanglement on macroscopic scales in a resonantly laser-excited atomic ensemble
• The thermalization of a two-level atom in a planar dielectric system out of thermal equilibrium
• Transport approach to quantum state tomography