p-Wave stabilization of three-dimensional Bose-Fermi solitons

Details p-Wave stabilization of three-dimensional Bose-Fermi solitons p-Wave stabilization of three-dimensional Bose-Fermi solitons

2011-08-17

arxiv.org/abs/1108.3453v1

Phys. Rev. A 85, 013604 (2012)

Physics

Condensed Matter

Quantum Gases

9 pages, 6 figures

Scientific paper

10.1103/PhysRevA.85.013604

We explore bright soliton solutions of ultracold Bose-Fermi gases, showing that the presence of p-wave interactions can remove the usual collapse instability and support stable soliton solutions that are global energy minima. A variational model that incorporates the relevant s- and p-wave interactions in the system is established analytically and solved numerically to probe the dependencies of the solitons on key experimental parameters. Under attractive s-wave interactions, bright solitons exist only as meta-stable states susceptible to collapse. Remarkably, the presence of repulsive p-wave interactions alleviates this collapse instability. This dramatically widens the range of experimentally-achievable soliton solutions and indicates greatly enhanced robustness. While we focus specifically on the boson-fermion pairing of 87Rb and 40K, the stabilization inferred by repulsive p-wave interactions should apply to the wider remit of ultracold Bose-Fermi mixtures.

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