Journal of Quantum Information Science

Volume 4, Issue 1 (March 2014)

ISSN Print: 2162-5751   ISSN Online: 2162-576X

Google-based Impact Factor: 0.95  Citations  

Super Quantum Discord and Inferior “Geometric Discord” Based on Weak Measurement in Noninertial Frames

HTML  XML Download Download as PDF (Size: 1184KB)  PP. 54-63  
DOI: 10.4236/jqis.2014.41005    4,101 Downloads   6,296 Views  Citations

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.

Share and Cite:

Xiang, M. and Jing, J. (2014) Super Quantum Discord and Inferior “Geometric Discord” Based on Weak Measurement in Noninertial Frames. Journal of Quantum Information Science, 4, 54-63. doi: 10.4236/jqis.2014.41005.

Copyright © 2024 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.