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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Phases, many-body entropy measures, and coherence of interacting bosons in optical lattices

Texto completo
Autor(es):
Roy, R. [1] ; Gammal, A. [2] ; Tsatsos, M. C. [3] ; Chatterjee, B. [4] ; Chakrabarti, B. [1, 2] ; Lode, A. U. J. [5, 6, 7]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Presidency Univ, Dept Phys, 86-1 Coll St, Kolkata 700073 - India
[2] Univ Sao Paulo, Inst Fis, BR-05580090 Sao Paulo - Brazil
[3] Univ Sao Paulo, Inst Fis Sao Carlos, CP 369, BR-13560970 Sao Carlos, SP - Brazil
[4] Indian Inst Technol, Dept Phys, Kanpur 208016, Uttar Pradesh - India
[5] Univ Basel, Dept Phys, CH-4056 Basel - Switzerland
[6] Univ Vienna, Fac Math, Wolfgang Pauli Inst, Oskar Morgenstern Pl 1, A-1090 Vienna - Austria
[7] TU Wien, Vienna Ctr Quantum Sci & Technol, Atominst, Stadionallee 2, A-1020 Vienna - Austria
Número total de Afiliações: 7
Tipo de documento: Artigo Científico
Fonte: Physical Review A; v. 97, n. 4 APR 24 2018.
Citações Web of Science: 10
Resumo

Already a fewbosons with contact interparticle interactions in small optical lattices feature a variety of quantum phases: superfluid, Mott-insulator, and fermionized Tonks gases can be probed in such systems. To detect these phases-pivotal for both experiment and theory-as well as their many-body properties we analyze several distinct measures for the one-body and many-body Shannon information entropies. We exemplify the connection of these entropies with spatial correlations in the many-body state by contrasting them to the Glauber normalized correlation functions. To obtain the ground state for lattices with commensurate filling (i.e., an integer number of particles per site) for the full range of repulsive interparticle interactions we utilize the multiconfigurational time-dependent Hartree method for bosons (MCTDHB) in order to solve the many-boson Schrodinger equation. We demonstrate that all emergent phases-the superfluid, the Mott insulator, and the fermionized gas can be characterized equivalently by many-body entropy measures and by Glauber's normalized correlation functions. In sharp contrast, single-particle entropy cannot capture these phases. (AU)

Processo FAPESP: 16/19622-0 - Dinâmica de resfriamento de bósons em uma rede óptica 1D
Beneficiário:Arnaldo Gammal
Linha de fomento: Auxílio à Pesquisa - Pesquisador Visitante - Internacional