Vortex lattice in the crossover of a Bose gas from weak coupling to unitarity

Autor(es)

Adhikari, S. K. ^[1] ; Salasnich, L. ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] UNESP Univ Estadual Paulista, Inst Fis Teor, BR-01140070 Sao Paulo, SP - Brazil

^[2] Univ Padua, Dipartimento Fis & Astron Galileo Galilei, Via Marzolo 8, I-35131 Padua - Italy

^[3] CNR, INO, Via Nello Carrara 1, I-50019 Sesto Fiorentino - Italy

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIFIC REPORTS; v. 8, JUN 11 2018.
• Citações Web of Science: 7

Resumo

The formation of a regular lattice of quantized vortices in a fluid under rotation is a smoking-gun signature of its superfluid nature. Here we study the vortex lattice in a dilute superfluid gas of bosonic atoms at zero temperature along the crossover from the weak-coupling regime, where the inter-atomic scattering length is very small compared to the average distance between atoms, to the unitarity regime, where the inter-atomic scattering length diverges. This study is based on high-performance numerical simulations of the time-dependent nonlinear Schrodinger equation for the superfluid order parameter in three spatial dimensions, using a realistic analytical expression for the bulk equation of state of the system along the crossover from weak-coupling to unitarity. This equation of state has the correct weak-coupling and unitarity limits and faithfully reproduces the results of an accurate multi-orbital microscopic calculation. Our numerical predictions of the number of vortices and root-mean-square sizes are important benchmarks for future experiments. (AU)

• Processo FAPESP: 16/01343-7 - ICTP Instituto Sul-Americano para Física Fundamental: um centro regional para física teórica
• Beneficiário: Nathan Jacob Berkovits
• Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais
• Processo FAPESP: 12/00451-0 - Estudo de propriedades do condensado de Bose-Einstein: átomos dipolares e condensado de férmions
• Beneficiário: Sadhan Kumar Adhikari
• Modalidade de apoio: Auxílio à Pesquisa - Temático