Einstein-Podolsky-Rosen Steering in Quantum Phase Transition [article]

Chunfeng Wu, Jing-Ling Chen, Dong-Ling Deng, Hong-Yi Su, X. X. Yi, and C. H. Oh
2012 arXiv   pre-print
We investigate the Einstein-Podolsky-Rosen (EPR) steering and its criticality in quantum phase transition. It is found that the EPR steerability function of the ground state of XY spin chain exhibits nonanalytic feature in the vicinity of a quantum phase transition by showing that its derivative with respect to anisotropy parameter diverges at the critical point. We then verify the universality of the critical phenomena of the EPR steerability function in the system. We also use two-qubit
more » ... eering inequality to explore the relation between EPR steering and quantum phase transition.
arXiv:1201.0243v2 fatcat:og3qzocnxbbitjvqwodvdao5ti