Stefano Zippilli et al 2008 New J. Phys. 10 103003 doi:10.1088/1367-2630/10/10/103003
Entanglement of distant atoms by projective measurement: the role of detection efficiency
Stefano Zippilli1, Georgina A Olivares-Rentería1,2, Giovanna Morigi1, Carsten Schuck3, Felix Rohde3 and Jürgen Eschner3
Show affiliationsWe assess proposals for entangling two distant atoms by measurement of emitted photons, analyzing how their performance depends on the photon detection efficiency. We consider schemes based on measurement of one or two photons and compare them in terms of the probability to obtain the detection event and of the conditional fidelity with which the desired entangled state is created. Based on an unraveling of the master equation, we quantify the parameter regimes in which one or the other scheme is more efficient, including the possible combination of the one-photon scheme with state purification. In general, protocols based on one-photon detection are more efficient in setups characterized by low photon detection efficiency, while at larger values two-photon protocols are preferable. We give numerical examples based on current experiments.
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Issue 10 (October 2008)
Received 5 June 2008
Published 2 October 2008
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Entanglement of distant atoms by projective measurement: the role of detection efficiency
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