Dynamics and Thermodynamics of the Low-Temperature Strongly Interacting Bose Gas

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2011
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  • We measure the zero-temperature equation of state of a homogeneous Bose gas of Li7 atoms by analyzing the in situ density distributions of trapped samples. For increasing repulsive interactions our data show a clear departure from mean-field theory and provide 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 ξ>0.44(8) that would characterize the universal Bose gas at the unitary limit. © 2011 American Physical Society.
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  • info:eu-repo/semantics/restrictedAccess
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Forschungsinformationssystem der UHH
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oai:www.edit.fis.uni-hamburg.de:publications/258e2492-3139-459a-8e41-75e6b0f8476a