Steady state entanglement of two coupled qubits

Abstract

The maximum entanglement between two coupled qubits in the steady state under two independent incoherent sources of excitation is reported. Asymmetric configurations where one qubit is excited while the other one dissipates the excitation are optimal for entanglement, reaching values three times larger than with thermal sources. The reason is the purification of the steady state mixture (that includes a Bell state) thanks to the saturation of the pumped qubit. Photon antibunching between the cross emission of the qubits can be used to experimentally evidence the large degrees of entanglement.

7 pages, 5 figures

References in corpus (40)

• Quantum entanglement
• Entanglement of Formation of an Arbitrary State of Two Qubits
• Quantum Computing
• Coupling Superconducting Qubits via a Cavity Bus
• Sudden Death of Entanglement
• Coherent control of an atomic collision in a cavity
• Creation of Entanglement by Interaction with a Common Heat Bath
• Entangled states and collective nonclassical effects in two-atom systems
• Environment Induced Entanglement in Markovian Dissipative Dynamics
• Direct Observation of Controlled Coupling in an Individual Quantum Dot Molecule
• Entanglement induced by a single-mode heat environment
• Entangled light from white noise
• Maximizing the entanglement of two mixed qubits
• Entanglement in the Dicke model
• Strong-coupling of quantum dots in microcavities
• Photon statistics from coupled quantum dots
• Steady state entanglement in open and noisy quantum systems at high temperature
• Mutual Coupling of two Semiconductor Quantum Dots via an Optical Nanocavity Mode
• Entangling two unequal atoms through a common bath
• Non-equilibrium Entanglement and Noise in Coupled Qubits
• Entanglement and entropy engineering of atomic two-qubit states
• Interqubit coupling mediated by a high-excitation-energy quantum object
• Entanglement between charge qubits induced by a common dissipative environment
• Noise-assisted preparation of entangled atoms
• Stochastic Resonance Phenomena in Quantum Many-Body Systems
• Steady state entanglement between hybrid light-matter qubits
• Generation and propagation of entanglement in driven coupled-qubit systems
• Strong and weak coupling of two coupled qubits
• Environment-induced entanglement with a single photon
• Control the entanglement of two atoms in an optical cavity via white noise
• Nonequilibrium thermal entanglement in three-qubit $XX$ model
• Entanglement dynamics of qubits in a common environment
• Entanglement and its dynamics in open, dissipative systems
• Quantum entanglement and disentanglement of multi-atom systems
• Stochastic resonance phenomena in spin chains
• Spontaneously generated atomic entanglement in free space: reinforced by incoherent pumping
• A dissipative scheme to approach the boundary of two-qubit entangled mixed states
• Electrostatic control of quantum dot entanglement induced by coupling to external reservoirs
• Generation of Werner-like stationary states of two qubits in a thermal reservoir
• On the coupling of two quantum dots through a cavity mode

Cited by in corpus (18)

• Non-Markovianity assisted Steady State Entanglement
• Dissipation-driven generation of two-qubit entanglement mediated by plasmonic waveguides
• Dissipatively driven entanglement of two macroscopic atomic ensembles
• Lindblad equation approach for the full counting statistics of work and heat in driven quantum systems
• Steady state entanglement beyond thermal limits
• Steady-state entanglement and coherence of the coupled qubit system in equilibrium and nonequilibrium environments
• Asymmetric coupling between two quantum emitters
• Engineering W-type steady states for three atoms via dissipation in an optical cavity
• Distributed entanglement induced by dissipative bosonic media
• Steady-state entanglement between distant quantum dots in photonic crystal dimers
• Steady-state entanglement generation for non-degenerate qubits
• Inverse-designed dielectric cloaks for entanglement generation
• Two photons everywhere
• Unbalanced gain and loss in a quantum photonic system
• Excitonic entanglement of protected states in quantum dot molecules
• On the coupling of two quantum dots through a cavity mode
• Entanglement dynamics in minimal Kitaev chains
• Strain induced coupling and quantum information processing with hexagonal boron nitride quantum emitters