TITLE:
Super Quantum Discord and Inferior “Geometric Discord” Based on Weak Measurement in Noninertial Frames
AUTHORS:
Maohuai Xiang, Jiliang Jing
KEYWORDS:
Weak Measurement; Super Quantum Discord; Inferior; Geometric Discord
JOURNAL NAME:
Journal of Quantum Information Science,
Vol.4 No.1,
March
17,
2014
ABSTRACT:
Instead of projective measurement, we use weak
measurement to define quantum and geometric discords, and compare them with the
normal quantum and geometric discords based on the projective measurement in noninertial frames. We find that using weak
measurement to define quantum discord we can capture more quantum correlations
compared with the projective measurement, so calling it super quantum discord. However, we note that the
geometric discord based on the weak measurements becomes smaller, so we name it
inferior “geometric discord”. We also show that, although both the super
quantum discord and the inferior “geometric discord” decrease with the increase of observer’s acceleration, the super quantum
discord/inferior “geometric discord”
increases/decreases as the measurements become weak. These differences reveal
that the definitions of the quantum and geometric discords are not too
concordant with each other.