Normal mass density of a superfluid Fermi gas at unitarity

TY - JOUR

T1 - Normal mass density of a superfluid Fermi gas at unitarity

AU - Baym, Gordon Alan

AU - Pethick, C. J.

PY - 2013/10/21

Y1 - 2013/10/21

N2 - We calculate the normal mass density of a paired Fermi gas at unitarity. The dominant contribution near the superfluid transition is from fermionic quasiparticle excitations and is, thus, sensitive to the pairing gap. A comparison with the recent experiment of Sidorenkov suggests that the superfluid gap near the transition temperature is larger than the BCS value, but the data do not permit a quantitative inference of the gap. Calculations of the quenched moment of inertia of a BCS superfluid in a harmonic trap are in reasonable agreement with the earlier experiment of Riedl.

AB - We calculate the normal mass density of a paired Fermi gas at unitarity. The dominant contribution near the superfluid transition is from fermionic quasiparticle excitations and is, thus, sensitive to the pairing gap. A comparison with the recent experiment of Sidorenkov suggests that the superfluid gap near the transition temperature is larger than the BCS value, but the data do not permit a quantitative inference of the gap. Calculations of the quenched moment of inertia of a BCS superfluid in a harmonic trap are in reasonable agreement with the earlier experiment of Riedl.

U2 - 10.1103/PhysRevA.88.043631

DO - 10.1103/PhysRevA.88.043631

M3 - Journal article

SN - 2469-9926

VL - 88

SP - 043631

JO - Physical Review A (Atomic, Molecular and Optical Physics)

JF - Physical Review A (Atomic, Molecular and Optical Physics)

IS - 043631

ER -