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The universal equation of state of a unitary fermionic gas

It is suggested that for a fermi gas at unitarity, the two-body bond plays a special role. We propose an equation of state using an ansatz relating the interaction part of the $l$-body cluster to its two-body counterpart. This allows a parameter-free comparison with the recently measured equation of state by the ENS group. The agreement between the two over a range of fugacity ($z<5$ for a homogeneous gas, and $z<10$ for the trapped gas) leads us to perform the calculations of more sensitive quantities measured recently by the MIT group.

preprint2012arXivOpen access
R. K. BhaduriW. van DijkM. V. N. Murthy
cond-mat.stat-mech
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R. K. BhaduriW. van DijkM. V. N. Murthy

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