@article{ISI:000257288900071,
 abstract = {We study the quenching dynamics of a one-dimensional spin-1/2 XY model
in a transverse field when the transverse field h(=t/tau) is quenched
repeatedly between -infinity and +infinity. A single passage from h
->-infinity to h ->+infinity or the other way around is referred to as a
half period of quenching. For an even number of half periods, the
transverse field is brought back to the initial value of -infinity; in
the case of an odd number of half periods, the dynamics is stopped at h
->+infinity. The density of defects produced due to the nonadiabatic
transitions is calculated by mapping the many-particle system to an
equivalent Landau-Zener problem and is generally found to vary as 1/root
tau for large tau; however, the magnitude is found to depend on the
number of half periods of quenching. For two successive half periods,
the defect density is found to decrease in comparison to a single half
period, suggesting the existence of a corrective mechanism in the
reverse path. A similar behavior of the density of defects and the local
entropy is observed for repeated quenching. The defect density decays as
1/root tau for large tau for any number of half periods, and shows an
increase in kink density for small tau for an even number; the entropy
shows qualitatively the same behavior for any number of half periods.
The probability of nonadiabatic transitions and the local entropy
saturate to 1/2 and ln 2, respectively, for a large number of repeated
quenching.},
 article-number = {214427},
 author = {Mukherjee, Victor and Dutta, Amit and Sen, Diptiman},
 doi = {10.1103/PhysRevB.77.214427},
 eissn = {2469-9969},
 issn = {2469-9950},
 journal = {PHYSICAL REVIEW B},
 month = {JUN},
 number = {21},
 orcid-numbers = {Mukherjee, Victor/0000-0003-3324-8056
Mukherjee, Victor/0000-0003-3324-8056},
 researcherid-numbers = {Mukherjee, Victor/AAR-3999-2020
Mukherjee, Victor/C-5241-2018},
 times-cited = {41},
 title = {Defect generation in a spin-1/2 transverse XY chain under repeated
quenching of the transverse field},
 unique-id = {ISI:000257288900071},
 volume = {77},
 year = {2008}
}