We present analytical results on entanglement and decoherence in a system of N strongly driven two-level atoms resonantly coupled to a dissipative cavity mode. In the specific cases of N = 3 and 4 qubits we show the existence of decoherence-free subspaces for the whole system and/or the atomic subsystem and we discuss examples where a multipartite qubit entanglement remains preserved. Also we illustrate the conditional preparation of cat-like states of the cavity field and the generation of atomic correlations.

Decoherence-free multipartite atomic entanglement in a cavity QED system / M. Bina, F. Casagrande, A. Lulli. - In: INTERNATIONAL JOURNAL OF QUANTUM INFORMATION. - ISSN 0219-7499. - 7:suppl.(2009), pp. 229-235. ((Intervento presentato al 4. convegno Quantum : International Workshop ad memoriam of Carlo Novero tenutosi a Torino nel 2008 [10.1142/S021974990900461X].

Decoherence-free multipartite atomic entanglement in a cavity QED system

M. Bina
Primo
;
F. Casagrande
;
2009

Abstract

We present analytical results on entanglement and decoherence in a system of N strongly driven two-level atoms resonantly coupled to a dissipative cavity mode. In the specific cases of N = 3 and 4 qubits we show the existence of decoherence-free subspaces for the whole system and/or the atomic subsystem and we discuss examples where a multipartite qubit entanglement remains preserved. Also we illustrate the conditional preparation of cat-like states of the cavity field and the generation of atomic correlations.
Multipartite entanglement; decoherence; cavity quantum electrodynamics
Settore FIS/03 - Fisica della Materia
2009
Istituto Nazionale di Ricerca Metrologica
Regione Piemonte
Università degli Studi di Bari
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/70342
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