Probing relaxation dynamics of a few strongly correlated bosons in a 1D triple well optical lattice

Autor(es)

Bera, S. ^[1] ; Roy, R. ^[1] ; Gammal, A. ^[2] ; Chakrabarti, B. ^{[2, 3, 1]} ; Chatterjee, B. ^[4]

Afiliação do(s) autor(es)

^[1] Presidency Univ, Dept Phys, 86-1 Coll St, Kolkata 700073 - India

^[2] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo - Brazil

^[3] Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste - Italy

^[4] Indian Inst Technol Kanpur, Dept Phys, Kanpur 208016, Uttar Pradesh - India

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS; v. 52, n. 21 NOV 14 2019.
• Citações Web of Science: 0

Resumo

The relaxation process of a few strongly interacting bosons in a triple well optical lattice is studied from the first principle using the multiconfigurational time-dependent Hartree method for bosons. We report the contrasting response of the system under two independent quench processes: an interaction quench and a lattice depth quench. We analyze the evolution of the reduced one-body density matrix, two-body density and the Shannon information entropy for a wide range of lattice depth and interaction strength parameters. For the strong interaction quench, we observe a very fast relaxation to the steady state. In contrast, for the lattice depth quench, we observe collapse-revival dynamics in all the key measures. We also provide the best fitting formulas for relaxation and revival time which follow power law decay. (AU)

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