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Article Dans Une Revue Physical Review A Année : 2013

Condensation energy of a spin-1/2 strongly interacting Fermi gas

Résumé

We report a measurement of the condensation energy of a two-component Fermi gas with tunable interactions. From the equation of state of the gas, we infer the properties of the normal phase in the zero-temperature limit. By comparing the pressure of the normal phase at T=0 to that of the low-temperature superfluid phase, we deduce the condensation energy, i.e., the energy gain of the system upon being in the superfluid rather than the normal state. We compare our measurements to a ladder approximation description of the normal phase and to a fixed-node Monte Carlo approach, finding excellent agreement. We discuss the relationship between condensation energy and pairing gap in the BEC-BCS crossover.

Dates et versions

hal-03740935 , version 1 (30-07-2022)

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Citer

N. Navon, S. Nascimbène, X. Leyronas, F. Chevy, C. Salomon. Condensation energy of a spin-1/2 strongly interacting Fermi gas. Physical Review A, 2013, 88 (6), pp.063614. ⟨10.1103/PhysRevA.88.063614⟩. ⟨hal-03740935⟩
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