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Abstract: We propose a scheme to generate quantum superpositions of macroscopicallydistinct flow states of ultracold atoms on a ring using Raman couplingemploying a quantized laser field that is a cat-like superposition of opticalvortices with opposite winding numbers. For atoms initially in their groundstate and entangled optical vortices of coherent states, this scheme canproduce a superposition of rotating and non-rotating states. We find fidelitiesof the quantum superpositions around 0.9 even before optimization.



Author: Rina Kanamoto, Ewan M. Wright

Source: https://arxiv.org/







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