Macroscopic superposition states in rotating ring lattices

Details Macroscopic superposition states in rotating ring lattices Macroscopic superposition states in rotating ring lattices

2008-02-29

arxiv.org/abs/0802.4309v2

Journal of Modern Optics, vol. 55, issue 19, pp. 3339-3348 (2008)

Physics

Condensed Matter

Other Condensed Matter

8 pages, 4 figures; PQE-2008 conference proceedings; minor corrections

Scientific paper

10.1080/09500340802411997

We investigate the effects of rotation on one-dimensional ultracold bosons confined to optical ring lattices. First, we show that there exists a critical rotation frequency at which the ground state of a weakly-interacting and integer-filled atomic gas is fragmented into a macroscopic superposition state with different circulation. Second, we point out several advantages of using slightly non-uniform ring lattices. Finally, we demonstrate that different quasi-momentum states can be distinguished in time-of-flight absorption imaging and propose to probe correlations via the many-body oscillations induced by a sudden change in the rotation frequency.

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