Physics – Quantum Physics
Scientific paper
2010-12-22
Phys. Rev. A 83, 064302 (2011)
Physics
Quantum Physics
5 pages with 4 figures, Published Version
Scientific paper
10.1103/PhysRevA.83.064302
Noisy quantum walks are studied from the perspective of comparing their quantumness as defined by two popular measures, measurement-induced disturbance (MID) and quantum discord (QD). While the former has an operational definition, unlike the latter, it also tends to overestimate non-classicality because of a lack of optimization over local measurements. Applied to quantum walks, we find that MID, while acting as a loose upper bound on QD, still tends to reflect correctly the trends in the behavior of the latter. However, there are regimes where its behavior is not indicative of non-classicality: in particular, we find an instance where MID increases with the application of noise, where we expect a reduction of quantumness.
Banerjee Subhashish
Chandrashekar C. M.
Rao Ramachandka B.
Srikanth Raghavendra
No associations
LandOfFree
Quantumness of noisy quantum walks: a comparison between measurement-induced disturbance and quantum discord 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 Quantumness of noisy quantum walks: a comparison between measurement-induced disturbance and quantum discord, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantumness of noisy quantum walks: a comparison between measurement-induced disturbance and quantum discord will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-582538