Gap solitons in fermion superfluids. (English) Zbl 1187.82141

The authors consider the existence of stable gap solitons, supported by 1D, 2D or 3D optical lattice, in the DFG and BCS superfluid formed by a gas of fermion atoms with weak attraction between atoms with opposite orientations of the spin. The analysis is based on the combination of variational approximation and numerical solutions of the time-dependent equations, with the aim to construct families of stable fundamental gap solitons on one and two dimensions.


82D50 Statistical mechanics of superfluids
37K40 Soliton theory, asymptotic behavior of solutions of infinite-dimensional Hamiltonian systems
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