Data di Pubblicazione:
2016
Abstract:
We study the environmentally assisted local transitionless dynamics in closed spin systems driven through quantum critical points. In general the shortcut to adaiabaticity (STA) in quantum critical systems requires highly nonlocal control Hamiltonians. In this work we develop an approach to achieve local shortcuts to adiabaticity (LSTA) in spin chains, using local control fields which scale polynomially with the system size, following universal critical exponents. We relate the control fields to reduced fidelity susceptibility and use the transverse Ising model in one dimension to exemplify our generic results. We also extend our analysis to achieve LSTA in central spin models.
Tipologia CRIS:
01.01 Articolo in rivista
Keywords:
TRANSVERSE-FIELD; PHASE-TRANSITION; XY-MODEL; DYNAMICS; MECHANICS
Elenco autori:
Fazio, Rosario
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