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Spin-driven spatial symmetry breaking of spinor condensates in a double-well

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arxiv 1209.1056 v1 pith:KPWGRIUL submitted 2012-09-05 cond-mat.quant-gas

Spin-driven spatial symmetry breaking of spinor condensates in a double-well

Marina Mel\'e-Messeguer , Simone Paganelli , Bruno Juli\'a-D\'iaz , Anna Sanpera , Artur Polls This is my paper
classification cond-mat.quant-gas
keywords double-wellbreakingcondensatehamiltonianpotentialspatialspinspinor
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The properties of an F=1 spinor Bose-Einstein condensate trapped in a double-well potential are discussed using both a mean-field two-mode approach and a simplified two-site Bose-Hubbard Hamiltonian. We focus in the region of phase space in which spin effects lead to a symmetry breaking of the system, favoring the spatial localization of the condensate in one well. To model this transition we derive, using perturbation theory, an effective Hamiltonian that describes N/2 spin singlets confined in a double-well potential.

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