Bosonization and entanglement spectrum for one-dimensional polar bosons on disordered lattices

Xiaolong Deng 1 Roberta Citro 2 Edmond Orignac 3 Anna Minguzzi 4 Luis Santos 5
1 Institut für Theoretische Physik
2 Dipartamento di Fisica "E. R. Caianiello"
3 Phys-ENS - Laboratoire de Physique de l'ENS Lyon
4 LPMMC - Laboratoire de physique et modélisation des milieux condensés
5 Theoretical Quantum Optics Group
Institut für Theoretische Physik
Abstract : The extended Bose-Hubbard model subjected to a disordered potential is predicted to display a rich phase diagram. In the case of uniform random disorder one finds two insulating quantum phases -- the Mott-insulator and the Haldane insulator -- in addition to a superfluid and a Bose glass phase. In the case of a quasiperiodic potential further phases are found, eg the incommensurate density wave, adiabatically connected to the Haldane insulator. For the case of weak random disorder we determine the phase boundaries using a perturbative bosonization approach. We then calculate the entanglement spectrum for both types of disorder, showing that it provides a good indication of the various phases.
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Article dans une revue
New Journal of Physics, Institute of Physics: Open Access Journals, 2013, 15, pp.045023. 〈10.1088/1367-2630/15/4/045023〉
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https://hal-ens-lyon.archives-ouvertes.fr/ensl-00842755
Contributeur : Edmond Orignac <>
Soumis le : mardi 9 juillet 2013 - 12:35:22
Dernière modification le : jeudi 19 avril 2018 - 14:54:03

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Xiaolong Deng, Roberta Citro, Edmond Orignac, Anna Minguzzi, Luis Santos. Bosonization and entanglement spectrum for one-dimensional polar bosons on disordered lattices. New Journal of Physics, Institute of Physics: Open Access Journals, 2013, 15, pp.045023. 〈10.1088/1367-2630/15/4/045023〉. 〈ensl-00842755〉

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