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

We 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...

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Detalles Bibliográficos
Autores principales: Orso, G., Iucci, Carlos Aníbal, Cazalilla, M., Giamarchi, T.
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2009
Materias:
Física
Physics
Lattice (order)
Mott insulator
Perturbation theory (quantum mechanics)
Anderson impurity model
Condensed matter physics
Thermodynamic limit
Quasiperiodic function
Quantum mechanics
Boson
Optical lattice
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/126105
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-126105
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Physics
Lattice (order)
Mott insulator
Perturbation theory (quantum mechanics)
Anderson impurity model
Condensed matter physics
Thermodynamic limit
Quasiperiodic function
Quantum mechanics
Boson
Optical lattice
spellingShingle Física
Physics
Lattice (order)
Mott insulator
Perturbation theory (quantum mechanics)
Anderson impurity model
Condensed matter physics
Thermodynamic limit
Quasiperiodic function
Quantum mechanics
Boson
Optical lattice
Orso, G.
Iucci, Carlos Aníbal
Cazalilla, M.
Giamarchi, T.
Lattice modulation spectroscopy of strongly interacting bosons in disordered and quasiperiodic optical lattices
topic_facet Física
Physics
Lattice (order)
Mott insulator
Perturbation theory (quantum mechanics)
Anderson impurity model
Condensed matter physics
Thermodynamic limit
Quasiperiodic function
Quantum mechanics
Boson
Optical lattice
description We 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.
format Articulo
Preprint
author Orso, G.
Iucci, Carlos Aníbal
Cazalilla, M.
Giamarchi, T.
author_facet Orso, G.
Iucci, Carlos Aníbal
Cazalilla, M.
Giamarchi, T.
author_sort Orso, G.
title Lattice modulation spectroscopy of strongly interacting bosons in disordered and quasiperiodic optical lattices
title_short Lattice modulation spectroscopy of strongly interacting bosons in disordered and quasiperiodic optical lattices
title_full Lattice modulation spectroscopy of strongly interacting bosons in disordered and quasiperiodic optical lattices
title_fullStr Lattice modulation spectroscopy of strongly interacting bosons in disordered and quasiperiodic optical lattices
title_full_unstemmed Lattice modulation spectroscopy of strongly interacting bosons in disordered and quasiperiodic optical lattices
title_sort lattice modulation spectroscopy of strongly interacting bosons in disordered and quasiperiodic optical lattices
publishDate 2009
url http://sedici.unlp.edu.ar/handle/10915/126105
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AT iuccicarlosanibal latticemodulationspectroscopyofstronglyinteractingbosonsindisorderedandquasiperiodicopticallattices
AT cazalillam latticemodulationspectroscopyofstronglyinteractingbosonsindisorderedandquasiperiodicopticallattices
AT giamarchit latticemodulationspectroscopyofstronglyinteractingbosonsindisorderedandquasiperiodicopticallattices
bdutipo_str Repositorios
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