Exploring a New Post-Selection Condition for Efficient Linear Optics Quantum Computation

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dc.creatorCagli, R. Coen
dc.creatorAniello, P.
dc.creatorCesario, N.
dc.creatorFoncellino, F.
dc.date2004-12-28
dc.date.accessioned2026-07-07T06:36:31Z
dc.date.available2026-07-07T06:36:31Z
dc.descriptionRecently, it was shown that fundamental gates for theoretically efficient quantum information processing can be realized by using single photon sources, linear optics and quantum counters. One of these fundamental gates is the NS-gate, that is, the one-mode non-linear sign shift. In this work, firstly, we prove by a new rigorous proof that the upper bound of success probability of NS-gates with only one helper photon and an undefined number of ancillary modes is bounded by 0.25. Secondly, we explore the upper bound of success probability of NS-gate with a new post-selection measurement. The idea behind this new post-selection measurement is to condition the success of NS-gate transformation to the observation of only one helper photon in whichever of the output modes.
dc.description10 pages, 2 eps figures. Submitted to International Journal of Quantum Information
dc.identifierhttps://arxiv.org/abs/quant-ph/0412207
dc.identifierhttp://arxiv.org/abs/quant-ph/0412207
dc.identifierInt.J.Quant.Inf. 3 (2005) 611-621
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/100104
dc.subjectQuantum Physics
dc.titleExploring a New Post-Selection Condition for Efficient Linear Optics Quantum Computation
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