Reliable Equation of State for Composite Bosons in the 2D BCS-BEC Crossover
Authors: Salasnich L.,
Autors Affiliation: Univ Padua, Dipartimento Fis & Astron Galileo Galilei, Padua, Italy; INO CNR, Sez Sesto Fiorentino, Sesto Fiorentino, Italy.
Abstract: We briefly discuss recent experiments on the BCS-BEC crossover with ultracold alkali-metal atoms both in three-dimensional configurations and two-dimensional ones. Then we analyze the quantum-field-theory formalism used to describe an attractive D-dimensional Fermi gas taking into account Gaussian fluctuations. Finally, we apply this formalism to obtain a reliable equation of state of the 2D system at low temperaratures in the BEC regime of the crossover by performing a meaningful dimensional regularization of the divergent zero-point energy of collective bosonic excitations.
Journal/Review: JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM
Volume: 29 (3) Pages from: 597 to: 700
KeyWords: BCS-BEC crossover; Ultracold atoms; Dimensional regularizationDOI: 10.1007/s10948-015-3290-4Citations: 1data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-10References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here