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

N. G. Parker; D. A. Smith

doi:10.1103/physreva.85.013604

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arXiv · 1108.3453

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

N. G. Parker·D. A. Smith

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Abstract

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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BibTeX RIS

N. G. Parker, D. A. Smith. 2011-08-17. p-Wave stabilization of three-dimensional Bose-Fermi solitons. https://doi.org/10.1103/physreva.85.013604

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