Lattice modulation spectroscopy of strongly interacting bosons in disordered and quasiperiodic optical lattices

dc.creatorOrso, G.
dc.creatorIucci, Carlos Aníbal
dc.creatorCazalilla, M.
dc.creatorGiamarchi, T.
dc.date2009-09-30
dc.date2021-10-04T12:59:04Z
dc.date.accessioned2023-07-15T03:31:19Z
dc.date.available2023-07-15T03:31:19Z
dc.identifierhttp://sedici.unlp.edu.ar/handle/10915/126105
dc.identifierissn:1050-2947
dc.identifierissn:1094-1622
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7466029
dc.descriptionWe compute the absorption spectrum of strongly repulsive one-dimensional bosons in a disordered or quasiperiodic optical lattice. At commensurate filling, the particle-hole resonances of the Mott insulator are broadened as the disorder strength is increased. In the noncommensurate case, mapping the problem to the Anderson model allows us to study the Bose-glass phase. Surprisingly, we find that a perturbative treatment in both cases, weak and strong disorders, gives a good description at all frequencies. In particular, we find that the infrared-absorption rate in the thermodynamic limit is quadratic in frequency. This result is unexpected since for other quantities, like the conductivity in one-dimensional systems, perturbation theory is only applicable at high frequencies. We discuss applications to recent experiments on optical lattice systems and, in particular, the effect of the harmonic trap.
dc.descriptionInstituto de Física La Plata
dc.formatapplication/pdf
dc.languageen
dc.rightshttp://creativecommons.org/licenses/by-nc-sa/4.0/
dc.rightsCreative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.subjectFísica
dc.subjectPhysics
dc.subjectLattice (order)
dc.subjectMott insulator
dc.subjectPerturbation theory (quantum mechanics)
dc.subjectAnderson impurity model
dc.subjectCondensed matter physics
dc.subjectThermodynamic limit
dc.subjectQuasiperiodic function
dc.subjectQuantum mechanics
dc.subjectBoson
dc.subjectOptical lattice
dc.titleLattice modulation spectroscopy of strongly interacting bosons in disordered and quasiperiodic optical lattices
dc.typeArticulo
dc.typePreprint


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