期刊
PHYSICAL REVIEW RESEARCH
卷 4, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevResearch.4.033130
关键词
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资金
- CNR-National Research Council
- Provincia Autonoma di Trento
- INO-CNR BEC Center
- Quantera ERA-NET
- Engineering and Physical Science Research Council [EP/R043434/1]
- NAQUAS through the Consiglio Nazionale delle Ricerche
The equilibrium properties of a weakly interacting atomic Bose gas across the BKT and BEC phase transitions have been numerically studied through a dimensional crossover from two to three dimensions. The findings show a continuous shift in the character of the phase transition from BKT to BEC, and an increase in the critical temperature with dimensionality.
The equilibrium properties of a weakly interacting atomic Bose gas across the Berezinskii-Kosterlitz-Thouless (BKT) and Bose-Einstein condensation (BEC) phase transitions are numerically investigated through a dimensionality crossover from two to three dimensions. The crossover is realized by confining the gas in an experimentally feasible hybridized trap which provides homogeneity along the planar xy directions through a box potential in tandem with a harmonic transverse potential along the transverse z direction. The dimensionality is modified by varying the frequency of the harmonic trap from tight to loose transverse trapping. Our findings, based on a stochastic (projected) Gross-Pitaevskii equation, showcase a continuous shift in the character of the phase transition from BKT to BEC, and a monotonic increase of the identified critical temperature as a function of dimensionality, with the strongest variation exhibited for small chemical potential values up to approximately twice the transverse confining potential.
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