Long-lived spin entanglement induced by a spatially correlated thermal bath

2008/07/31 by Dara P. S. McCutcheon, Ahsan Nazir, Sougato Bose +2
Computer Science · Physics and Astronomy · #Concurrence #Dissipative system #Observable #Physics #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum decoherence #Quantum entanglement #Quantum mechanics #Qubit #Spin (aerodynamics) #Statistical physics #cond-mat.other #quant-ph

paper · pdf · doi:10.1103/physreva.80.022337

published as Phys. Rev. A 80, 022337 (2009) · 5 pages, 2 figures

openalex publication_date 2009/08/28 · arxiv created 2009/09/01 · arxiv updated 2013/05/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We investigate how two spatially separated qubits coupled to a common heat bath can be entangled by purely dissipative dynamics. We identify a dynamical time scale associated with the lifetime of the dissipatively generated entanglement and show that it can be much longer than either the typical single-qubit decoherence time or the time scale on which a direct exchange interaction can entangle the qubits. We give an approximate analytical expression for the long-time evolution of the qubit concurrence and propose an ion trap scheme in which such dynamics should be observable.

Citations

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