Recursos de colección

Caltech Authors (144.724 recursos)

Repository of works by Caltech published authors.

Group = Institute for Quantum Information

Mostrando recursos 1 - 1 de 1

  1. Elementary Excitations in Gapped Quantum Spin Systems

    Haegeman, Jutho; Michalakis, Spyridon; Nachtergaele, Bruno; Osborne, Tobias J.; Schuch, Norbert; Verstraete, Frank
    For quantum lattice systems with local interactions, the Lieb-Robinson bound serves as an alternative for the strict causality of relativistic systems and allows the proof of many interesting results, in particular, when the energy spectrum exhibits an energy gap. In this Letter, we show that for translation invariant systems, simultaneous eigenstates of energy and momentum with an eigenvalue that is separated from the rest of the spectrum in that momentum sector can be arbitrarily well approximated by building a momentum superposition of a local operator acting on the ground state. The error satisfies an exponential bound in the size of...
    (application/pdf; application/pdf) - 12-oct-2013

Aviso de cookies: Usamos cookies propias y de terceros para mejorar nuestros servicios, para análisis estadístico y para mostrarle publicidad. Si continua navegando consideramos que acepta su uso en los términos establecidos en la Política de cookies.