Entanglement dynamics for two-level quantum systems coupled with massive scalar fields

Abstract

Entanglement is essential in quantum information science. Typically, the inevitable coupling between quantum systems and environment inhibits entanglement from being created between long-distance subsystems and being maintained for a long time. In this paper, we show that when the environment is composed of a bath of massive scalar fields, the region of the separation within which entanglement can be generated is significantly enlarged, and the decay rate of entanglement is significantly slowed down compared with those in the massless case, when the mass of the field $m$ is smaller than but close to the transition frequency of the qubits $\omega$. When $m\ge \omega$, the initial entanglement can be maintained for an arbitrarily long time, regardless of the environmental temperature. Therefore, in principle, it is possible to achieve long-distance entanglement generation and long-lived entanglement by manipulating the energy level spacing of the two-level systems with respect to the mass of the field.

arXiv comment16 pages, 2 figures, accepted for publication in Phys. Lett. A

References in corpus (30)

• Entanglement of Formation of an Arbitrary State of Two Qubits
• A computable measure of entanglement
• Finite-Time Disentanglement via Spontaneous Emission
• On the volume of the set of mixed entangled states
• Sudden Death of Entanglement
• Entanglement of two qubits mediated by one-dimensional plasmonic waveguides
• Creation of Entanglement by Interaction with a Common Heat Bath
• Entangled states and collective nonclassical effects in two-atom systems
• Photon and Graviton Mass Limits
• Environment Induced Entanglement in Markovian Dissipative Dynamics
• Entanglement from the vacuum
• Dynamics of the entanglement between two oscillators in the same environment
• Sudden death and sudden birth of entanglement in common structured reservoirs
• Entanglement in the Dicke model
• Delayed (sudden) birth of entanglement
• Spontaneous excitation of an accelerated atom: The contributions of vacuum fluctuations and radiation reaction
• Exact Master Equation and Quantum Decoherence of Two Coupled Harmonic Oscillators in a General Environment
• Entangling two atoms via spontaneous emission
• Open system approach to neutrino oscillations
• Non-Markovian entanglement dynamics of quantum continuous variable systems in thermal environments
• Nonradiative interaction and entanglement between distant atoms
• Entangling oscillators through environment noise
• Massive Klein--Gordon equation from a BEC-based analogue spacetime
• Controlling Entanglement Generation in External Quantum Fields
• Environment-induced two-mode entanglement in quantum Brownian motion
• Bright and Dark periods in the Entanglement Dynamics of Interacting Qubits in Contact with the Environment
• Distance and Coupling Dependence of Entanglement in the Presence of a Quantum Field
• Geometric phase of neutrino propagating through dissipative matter
• Casimir-Polder interactions with massive photons: implications for BSM physics
• Mixed state geometric phase for neutrino oscillations

Cited by in corpus (4)

• Entanglement dynamics for Unruh-DeWitt detectors interacting with massive scalar fields: The Unruh and anti-Unruh effects
• Effective master equations for two accelerated qubits
• Cohering and decohering power of massive scalar fields under instantaneous interactions
• Mitigating the information degradation in a massive Unruh-DeWitt theory