dc.creator | Goussev, Arseni | |
dc.creator | Jalabert, Rodolfo | |
dc.creator | Pastawski, Horacio Miguel | |
dc.creator | Wisniacki, Diego Ariel | |
dc.date.accessioned | 2018-09-13T22:00:21Z | |
dc.date.accessioned | 2018-11-06T12:33:33Z | |
dc.date.available | 2018-09-13T22:00:21Z | |
dc.date.available | 2018-11-06T12:33:33Z | |
dc.date.created | 2018-09-13T22:00:21Z | |
dc.date.issued | 2012-06-28 | |
dc.identifier | Goussev, Arseni; Jalabert, Rodolfo; Pastawski, Horacio Miguel; Wisniacki, Diego Ariel; Loschmidt echo; Scholarpedia; Scholarpedia; 7; 8; 28-6-2012; 11687-11687 | |
dc.identifier | 1941-6016 | |
dc.identifier | http://hdl.handle.net/11336/59652 | |
dc.identifier | CONICET Digital | |
dc.identifier | CONICET | |
dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/1867826 | |
dc.description.abstract | The Loschmidt echo is a measure of the revival occurring when an imperfect time-reversal procedure is applied to a complex quantum system. It allows to quantify the sensitivity of quantum evolution to perturbations. An initial quantum state |ψ0⟩ evolves during a time t under a Hamiltonian H1 reaching the state |ψt⟩. Aiming to recover the initial state |ψ0⟩ a new Hamiltonian −H2 is applied between t and 2t. Perfect recover of |ψ0⟩ would be achieved by choosing H2 to be equal to H1. This is not possible in realistic setups, and there always appears a difference between H2 and H1, leading to a non-perfect recovery of the initial state. The forward evolution between t and 2t under the Hamiltonian −H2 is equivalent to a backward evolution from t to 0 under H2, which embodies the notion of time-reversal. The Loschmidt echo studies are focused on the cases where the dynamics induced by the Hamiltonians H1 and H2 are non-trivial, or sufficiently complex (like that of a classically chaotic one-particle system or a many-body system). | |
dc.language | eng | |
dc.publisher | Scholarpedia | |
dc.relation | info:eu-repo/semantics/altIdentifier/url/http://www.scholarpedia.org/article/Loschmidt_echo | |
dc.relation | info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.4249/scholarpedia.11687 | |
dc.rights | https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ | |
dc.rights | info:eu-repo/semantics/openAccess | |
dc.subject | QUANTUM MECHANICS | |
dc.subject | IRREVERSIBILITY | |
dc.subject | CHAOS | |
dc.title | Loschmidt echo | |
dc.type | Artículos de revistas | |
dc.type | Artículos de revistas | |
dc.type | Artículos de revistas | |