Wednesday, October 17, 2012

1201.2232 (Yukihiro Ota et al.)

Entanglement amplification via local weak measurements    [PDF]

Yukihiro Ota, Sahel Ashhab, Franco Nori
We propose a measurement-based method to produce a maximally-entangled state from a partially-entangled pure state. Our goal can be thought of as entanglement distillation from a single copy of a partially-entangled state. The present approach involves local two-outcome weak measurements. We show that application of these local weak measurements leads to a probabilistic amplification of entanglement. In addition, we examine how the probability to find the maximally-entangled state is related to the entanglement of the input state. We also study the application of our method to a mixed initial state. We show that the protocol is successful if the separable part of the mixed initial state fulfils certain conditions.
View original: http://arxiv.org/abs/1201.2232

No comments:

Post a Comment