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Supersymmetric Model of a Bose-Einstein Condensate in a 𝓟𝓣-Symmetric Double-delta Trap

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Abstract

The most important properties of a Bose-Einstein condensate subject to balanced gain and loss can be modelled by a Gross-Pitaevskii equation with an external 𝓟𝓣-symmetric double-delta potential. We study its linear variant with a supersymmetric extension. It is shown that both in the 𝓟𝓣-symmetric as well as in the 𝓟𝓣-broken phase arbitrary stationary states can be removed in a supersymmetric partner potential without changing the energy eigenvalues of the other state. The characteristic structure of the singular delta potential in the supersymmetry formalism is discussed, and the applicability of the formalism to the nonlinear Gross-Pitaevskii equation is analysed. In the latter case the formalism could be used to remove 𝓟𝓣-broken states introducing an instability to the stationary 𝓟𝓣-symmetric states.

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Authors and Affiliations

  1. Institut für Theoretische Physik 1, Universität Stuttgart, 70550, Stuttgart, Germany

    Nikolas Abt, Holger Cartarius & Günter Wunner

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  1. Nikolas Abt
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  2. Holger Cartarius
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  3. Günter Wunner
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Correspondence to Holger Cartarius.

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Abt, N., Cartarius, H. & Wunner, G. Supersymmetric Model of a Bose-Einstein Condensate in a 𝓟𝓣-Symmetric Double-delta Trap. Int J Theor Phys 54, 4054–4067 (2015). https://doi.org/10.1007/s10773-014-2467-0

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  • DOI: https://doi.org/10.1007/s10773-014-2467-0

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