Physics – Quantum Physics
Scientific paper
2010-06-07
Phys. Rev. A 83, 022311 (2011)
Physics
Quantum Physics
version 2; 5 pages, 1 figure; added references;
Scientific paper
10.1103/PhysRevA.83.022311
Quantum systems prepared in pure states evolve into mixtures under environmental action. Physically realizable ensembles are the pure state decompositions of those mixtures that can be generated in time through continuous measurements of the environment. Here, we define physically realizable entanglement as the average entanglement over realizable ensembles. We optimize the measurement strategy to maximize and minimize this quantity through local observations on the independent environments that cause two qubits to disentangle in time. We then compare it with the entanglement bounds for the unmonitored system. For some relevant noise sources the maximum realizable entanglement coincides with the upper bound, establishing the scheme as an alternative to locally protect entanglement. However, for local strategies, the lower bound of the unmonitored system is not reached.
Cavalcanti Daniel
França Santos Marcelo
Mascarenhas Eduardo
Vedral Vlatko
No associations
LandOfFree
Physically Realizable Entanglement by Local Continuous Measurements does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Physically Realizable Entanglement by Local Continuous Measurements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Physically Realizable Entanglement by Local Continuous Measurements will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-367094