David W Hallwood et al 2006 New J. Phys. 8 180 doi:10.1088/1367-2630/8/9/180
Macroscopic superpositions of superfluid flows
Focus on Cold Atoms in Optical LatticesDavid W Hallwood1, Keith Burnett1 and Jacob Dunningham2
Show affiliationsPart of Focus on Cold Atoms in Optical Lattices
We present a scheme for creating macroscopic superpositions of the direction of superfluid flow around a loop. Using the Bose–Hubbard model, we study an array of Bose–Einstein condensates (BECs) trapped in optical potentials and coupled to one another to form a ring. By rotating the ring so that each particle acquires on average half a quantum of superfluid flow, it is possible to create a multiparticle superposition of all the particles rotating and all the particles stationary. Under certain conditions it is possible to scale up the number of particles to form a macroscopic superposition. The simplicity of the model has allowed us to study macroscopic superpositions at an atomic level for different variables. Here, we concentrate on the tunnelling strength between the potentials. Further investigation remains important, because it could lead us to making an ultra-precise quantum-limited gyroscope.
- PACS
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03.75.Kk Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow
03.75.Gg Entanglement and decoherence in Bose-Einstein condensates
- Subjects
- Dates
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Issue 9 (September 2006)
Received 9 May 2006
Published 8 September 2006
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Macroscopic superpositions of superfluid flows
David W Hallwood et al 2006 New J. Phys. 8 180
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