@article{ISI:000270383900045,
 abstract = {We compute concurrence and negativity as measures of two-spin
entanglement generated by a power-law quench (characterized by a rate
tau(-1) and an exponent alpha) which takes an anisotropic XY chain in a
transverse field through a quantum critical point (QCP). We show that
only spins separated by an even number of lattice spacings get entangled
in such a process. Moreover, there is a critical rate of quench,
tau(-1)(c), above which no two-spin entanglement is generated; the
entire entanglement is multipartite. The ratio of the 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 root alpha/tau(alpha/tau), and we relate this scaling behavior
to defect production by the quench through a QCP.},
 article-number = {032304},
 author = {Sengupta, K. and Sen, Diptiman},
 doi = {10.1103/PhysRevA.80.032304},
 eissn = {1094-1622},
 issn = {1050-2947},
 journal = {PHYSICAL REVIEW A},
 month = {SEP},
 number = {3},
 times-cited = {34},
 title = {Entanglement production due to quench dynamics of an anisotropic XY
chain in a transverse field},
 unique-id = {ISI:000270383900045},
 volume = {80},
 year = {2009}
}