Measurement-induced two-qubit entanglement in a bad cavity: Fundamental and practical considerations

Brian Julsgaard; Klaus Mølmer

doi:10.1103/PhysRevA.85.032327

Measurement-induced two-qubit entanglement in a bad cavity: Fundamental and practical considerations

Institut for Fysik og Astronomi

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

13 Citationer (Scopus)

Abstract

An entanglement-generating protocol is described for two qubits coupled to a cavity field in the bad-cavity limit. By measuring the amplitude of a field transmitted through the cavity, an entangled spin-singlet state can be established probabilistically. Both fundamental limitations and practical measurement schemes are discussed, and the influence of dissipative processes and inhomogeneities in the qubits are analyzed. The measurement-based protocol provides criteria for selecting states with an infidelity scaling linearly with the qubit-decoherence rate.

Originalsprog	Engelsk
Tidsskrift	Physical Review A
Vol/bind	85
Nummer	3
Sider (fra-til)	032327
Antal sider	12
ISSN	2469-9926
DOI	https://doi.org/10.1103/PhysRevA.85.032327
Status	Udgivet - 21 mar. 2012

Adgang til dokumentet

10.1103/PhysRevA.85.032327

Citationsformater

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AB - An entanglement-generating protocol is described for two qubits coupled to a cavity field in the bad-cavity limit. By measuring the amplitude of a field transmitted through the cavity, an entangled spin-singlet state can be established probabilistically. Both fundamental limitations and practical measurement schemes are discussed, and the influence of dissipative processes and inhomogeneities in the qubits are analyzed. The measurement-based protocol provides criteria for selecting states with an infidelity scaling linearly with the qubit-decoherence rate.

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