Nonuniversal Equation of State of the Two-Dimensional Bose Gas
Year: 2017
Authors: Salasnich L.
Autors Affiliation: Univ Padua, Dipartimento Fis Astron Galileo Galilei, Via Marzolo 8, I-35131 Padua, Italy; CNISM, Unita Padova, Via Marzolo 8, I-35131 Padua, Italy; CNR, INO, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy.
Abstract: For a dilute two-dimensional Bose gas the universal equation of state has a logarithmic dependence on the s-wave scattering length. Here we derive nonuniversal corrections to this equation of state, taking account of finite-range effects of the interatomic potential. Our beyond-mean-field analytical results are obtained performing dimensional regularization of divergent zero-point quantum fluctuations within the finite-temperature formalism of functional integration. In particular, we find that in the grand canonical ensemble the pressure has a nonpolynomial dependence on the finite- range parameter and it is a highly nontrivial function of chemical potential and temperature.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 118 (13) Pages from: 130402-1 to: 130402-5
More Information: The author acknowledges for partial support the BIRD project Superfluid properties of Fermi gases in optical potentials of the University of Padova. The author thanks Alberto Cappellaro and Flavio Toigo for enlightening discussions, and Henk Stoof for useful e suggestions.KeyWords: Ground-state; Renormalization; Scattering; Systems; AtomsDOI: 10.1103/PhysRevLett.118.130402ImpactFactor: 8.839Citations: 19data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-06References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here