Stabilizing entanglement in the presence of local decay processes

Abstract

We investigate to what extent a suitably chosen system Hamiltonian can counteract local dissipative processes and preserve entanglement in the stationary state. The results determine prospects and limitations of dissipative state preparation schemes based on natural dissipative processes -- in contrast to engineered, typically non-local dissipative schemes. As an exemplary case, we determine the stationary state of two spontaneously decaying two-level systems with optimal entanglement properties. The corresponding system Hamiltonian is derived, and its possible experimental implementation is discussed in detail. Finally, we discuss generalizations for many qubits.

12 pages. Corresponds to published version

References in corpus (3)

• Quantum States and Phases in Driven Open Quantum Systems with Cold Atoms
• Dissipative preparation of entanglement in optical cavities
• Optimal coherent control to counteract dissipation

Cited by in corpus (12)

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• Dissipative remote-state preparation in an interacting medium
• Microscopic and phenomenological models of driven systems in structured reservoirs
• Geometry of local quantum dissipation and fundamental limits to local cooling
• Steady-state entanglement enhanced by a dissipative ancilla
• Stabilizable Gaussian states
• Quantum resources of the steady-state of three coupled qubits: Microscopic versus Phenomenological model
• Entanglement Generation and Stabilization by Coherent Collisions
• Isotropy and control of dissipative quantum dynamics
• Spectral stabilizability