, Volume 52, Issue 3, pp 987-996

Geometric Measure of Quantum Discord Under Decoherence and the Relevant Factorization Law

Purchase on Springer.com

$39.95 / €34.95 / £29.95*

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access

Abstract

We investigate the dynamics of geometric measure of quantum discord (GMQD) for a class of two-qubit states under local decoherence channels: bit-, phase-, and bit-phase flips. We find that there are four types of dynamical behaviors of the GMQD, i.e., monotonic decay, existing a sudden change point, existing two sudden change points, and unaffected for a finite time interval and then monotonic decay. Furthermore, we establish a factorization law for the GMQD under these decoherence channels. From this law the lower bound of the GMQD can be obtained.