Isothermal compressibility determination across Bose-Einstein condensation

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.

6 pages, 3 figures

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Cited by in corpus (7)

• Compressibility and speeds of sound across the superfluid to supersolid phase transition of an elongated dipolar gas
• Thermodynamics of the Noninteracting Bose Gas in a Two-Dimensional Box
• Thermodynamic measurement of the sound velocity of a Bose gas across the transition to Bose-Einstein condensation
• Critical properties of weakly interacting Bose gases as modified by a harmonic confinement
• Semi-classical and quantum description of an ideal Bose gas in a uniform gravitational field
• Thermal Global Expansion Coefficient Measurement for a Harmonic Trapped Gas Across Bose-Einstein Condensation
• Anomalous isothermal compressibility in spin-orbit coupled degenerate Fermi gases