Isothermal compressibility determination across Bose-Einstein condensation
Anno: 2015
Autori: Poveda-Cuevas F.J., Castilho P.C.M., Mercado-Gutierrez E.D., Fritsch A.R., Muniz S.R., Lucioni E., Roati G., Bagnato V.S.
Affiliazione autori: Univ Sao Paulo, Inst Fis Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil; Univ Florence, LENS, I-50019 Sesto Fiorentino, Italy; Univ Florence, Dipartimento Fis & Astron, I-50019 Sesto Fiorentino, Italy.
Abstract: We apply the global thermodynamic variables approach to experimentally determine the isothermal compressibility parameter kappa T of a trapped Bose gas across the phase transition. We demonstrate the behavior of kappa T around the critical pressure, revealing the second-order nature of the phase transition. Compressibility is the most important susceptibility to characterize the system. The use of global variables shows advantages with respect to the usual local density approximation method and can be applied to a broad range of situations.
Giornale/Rivista: PHYSICAL REVIEW A
Volume: 92 (1) Da Pagina: 13638-1 A: 13638-5
Maggiori informazioni: We acknowledge financial support from FAPESP (Brazil), CNPq (Brazil), CAPES (Brazil), and LENS (Italy).Parole chiavi: Thermal-expansion; Gas; Thermodynamics; Liquid-he-4; Coefficient; TransitionDOI: 10.1103/PhysRevA.92.013638Citazioni: 13dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18Riferimenti tratti da Isi Web of Knowledge: (solo abbonati)
