We propose a scheme to generate quantum superpositions of macroscopically distinct flow states of ultracold atoms on a ring using Raman coupling employing a quantized laser field that is a cat-like superposition of optical vortices with opposite winding numbers. For atoms initially in their ground state and entangled optical vortices of coherent states this scheme can produce a superposition of rotating and non-rotating states. We find fidelities of the quantum superpositions around 0.9 even before optimization.
- Optical vortices
- Raman coupler
- cat state
- quantum superposition
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics