Reference : Chaotic dynamics of a Bose-Einstein condensate coupled to a qubit
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/2268/17760
Chaotic dynamics of a Bose-Einstein condensate coupled to a qubit
English
Martin, John mailto [Université de Liège - ULg > Département de physique > Physique des atomes froids >]
Georgeot, B. [(1) Université de Toulouse, UPS, Laboratoire de Physique Théorique (IRSAMC), F-31062 Toulouse, France, (2) CNRS, LPT (IRSAMC), F-31062 Toulouse, France > > > > >]
Shepelyansky, D. L. [(1) Université de Toulouse, UPS, Laboratoire de Physique Théorique (IRSAMC), F-31062 Toulouse, France, (2) CNRS, LPT (IRSAMC), F-31062 Toulouse, France > > > >]
2009
Physical Review. E : Statistical, Nonlinear, and Soft Matter Physics
American Physical Society
79
066205
Yes (verified by ORBi)
International
1539-3755
College Park
MD
[en] We study numerically the coupling between a qubit and a Bose-Einstein condensate (BEC) moving in a kicked optical lattice, using Gross-Pitaevskii equation. In the regime where the BEC size is smaller than the lattice period, the chaotic dynamics of the BEC is effectively controlled by the qubit state. The feedback effects of the nonlinear chaotic BEC dynamics preserve the coherence and purity of the qubit in the regime of strong BEC nonlinearity. This gives an example of an exponentially sensitive control over a macroscopic state by internal qubit states. At weak nonlinearity quantum chaos leads to rapid dynamical decoherence of the qubit. The realization of such coupled systems is within reach of current experimental techniques.
http://hdl.handle.net/2268/17760
10.1103/PhysRevE.79.066205
http://link.aps.org/doi/10.1103/PhysRevE.79.066205

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