Universal energy distribution of quasi-particles emitted in a local time dependent quench

Details Universal energy distribution of quasi-particles emitted in a local time dependent quench Universal energy distribution of quasi-particles emitted in a local time dependent quench

2012-03-08

arxiv.org/abs/1203.1815v2

Physics

Condensed Matter

Statistical Mechanics

5 pages, 1 figure

Scientific paper

We study the emission of quasi-particles in the scaling limit of the 1d Quantum Ising chain at the critical point perturbed by a time dependent local transverse field. We compute \it exactly \rm and for a \it generic \rm time dependence the average value of the transverse magnetization, its correlation functions, as well as the statistic of both the inclusive and exclusive work. We show that, except for a cyclic perturbation, the probability distribution of the work at low energies is a power law whose exponent is universal, i.e. does not depend on the specific time dependent protocol, but only on the final value attained by the perturbation.

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