Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2009-04-07
Phys. Rev. A 80, 032304 (2009)
Physics
Condensed Matter
Statistical Mechanics
5 pages including 4 figures; added a figure on multipartite entanglement and some references -- this is the published version
Scientific paper
We compute concurrence and negativity as measures of two-site entanglement generated by a power-law quench (characterized by a rate 1/tau and an exponent alpha) which takes an anisotropic XY chain in a transverse field through a quantum critical point (QCP). We show that only the even-neighbor pairs of sites get entangled in such a process. Moreover, there is a critical rate of quench, 1/tau_c, above which no two-site entanglement is generated; the entire entanglement is multipartite. The ratio of the two-site entanglements between consecutive even neighbors can be tuned by changing the quench rate. We also show that for large tau, the concurrence (negativity) scales as sqrt{alpha/tau} (alpha/tau), and we relate this scaling behavior to defect production by the quench through a QCP.
Sen Diptiman
Sengupta Kausik
No associations
LandOfFree
Entanglement production due to quench dynamics of an anisotropic XY chain in a transverse field 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 Entanglement production due to quench dynamics of an anisotropic XY chain in a transverse field, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Entanglement production due to quench dynamics of an anisotropic XY chain in a transverse field will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-313735