We study the entanglement dynamics and relaxation properties of a system of two interacting qubits in the cases of (I) two independent bosonic baths and (II) one common bath. We find that in the case (II) the existence of a decoherence-free subspace (DFS) makes entanglement dynamics very rich. We show that when the system is initially in a state with a component in the DFS the relaxation time is surprisingly long, showing the existence of semi-decoherence free subspaces. (C) 2009 Elsevier B.V. All rights reserved.
Entanglement dynamics of coupled qubits and a semi-decoherence free subspace / Campagnano, G; Hamma, A; Weiss, U. - In: PHYSICS LETTERS A. - ISSN 0375-9601. - 374:3(2010), pp. 416-423. [10.1016/j.physleta.2009.10.081]
Entanglement dynamics of coupled qubits and a semi-decoherence free subspace
Hamma A;
2010
Abstract
We study the entanglement dynamics and relaxation properties of a system of two interacting qubits in the cases of (I) two independent bosonic baths and (II) one common bath. We find that in the case (II) the existence of a decoherence-free subspace (DFS) makes entanglement dynamics very rich. We show that when the system is initially in a state with a component in the DFS the relaxation time is surprisingly long, showing the existence of semi-decoherence free subspaces. (C) 2009 Elsevier B.V. All rights reserved.| File | Dimensione | Formato | |
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