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Topologically protected pure helicity cascade in non-Abelian quantum turbulence

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arxiv 1606.07190 v2 pith:65QPAYX3 submitted 2016-06-23 cond-mat.quant-gas cond-mat.stat-mech

classification cond-mat.quant-gascond-mat.stat-mech
keywords energycascadenon-abelianhelicityinjectionlarge-scaleproptoprotected
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abstract

By numerically studying non-Abelian quantum turbulence, we find that the helicity cascade and the inverse energy cascade are topologically protected against reconnection of vortices and lead to the energy spectrum $E(k) \propto k^{-7/3}$ for a large-scale energy injection and $E(k) \propto k^{-5/3}$ for a small-scale energy injection with a large-scale web of non-Abelian vortices. Our prediction can be tested in the cyclic phase of a spin-2 spinor Bose-Einstein condensate.

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