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Avoiding entanglement sudden death via measurement feedback control in a quantum network

Yamamoto, Naoki; Nurdin, Hendra; James, Matthew R; Petersen, Ian


In this paper, we consider a linear quantum network composed of two distantly separated cavities that are connected via a one-way optical field. When one of the cavities is damped and the other undamped, the overall cavity state obtains a large amount of entanglement in its quadratures. This entanglement, however, immediately decays and vanishes in a finite time. That is, entanglement sudden death occurs. We show that the direct measurement feedback method proposed by Wiseman can avoid this...[Show more]

CollectionsANU Research Publications
Date published: 2008-10-31
Type: Journal article
Source: Physical Review A: Atomic, Molecular and Optical Physics
DOI: 10.1103/PhysRevA.78.042339


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