Navon Piatecki Guenter et al 2011

From Werner KRAUTH

N. Navon, S. Piatecki, K. J. Günter, B. Rem, T. C. Nguyen, F. Chevy, W. Krauth, C. Salomon Dynamics and Thermodynamics of the Low-Temperature Strongly Interacting Bose Gas Physical Review Letters 107, 135301 (2011)

Abstract: We measure the zero-temperature equation of state of a homogeneous Bose gas of 7Li atoms by analyzing the in-situ density distributions of trapped samples. For increasing repulsive interactions our data shows a clear departure from mean-field theory and provides a quantitative test of the many-body corrections first predicted in 1957 by Lee, Huang and Yang. We further probe the dynamic response of the Bose gas to a varying interaction strength and compare it to simple theoretical models. We deduce a lower bound for the value of the universal constant <math>\xi</math> >0.44(8) that would characterize the universal Bose gas at the unitary limit.

Electronic version (arXiv)

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