Quantum superpositions of flow states on a ring

Abstract

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.

References in corpus (9)

• Quantized Rotation of Atoms From Photons with Orbital Angular Momentum
• Observation of persistent flow of a Bose-Einstein condensate in a toroidal trap
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• Schroedinger Cat: Entanglement test in a Micro-Macroscopic system
• Methods for Producing Optical Coherent State Superpositions
• Generation of macroscopic superposition states in ring superlattices
• Creation of macroscopic superposition states from arrays of Bose-Einstein condensates
• Vortex entanglement in Bose-Einstein condensates coupled to Laguerre-Gauss beams
• Creation of macroscopic superpositions of flow states with Bose-Einstein condensates

Cited by in corpus (5)

• Spin-Flipping Half Vortex in a Macroscopic Polariton Spinor Ring Condensate
• Macroscopic superposition states of ultracold bosons in a double-well potential
• Interaction of atom with non-paraxial Laguerre-Gaussian beam:Forming superposition of vortex states in Bose-Einstein condensates
• The optical manipulation of matter-wave vortices: An analogue of circular dichroism
• Transfer of orbital angular momentum superposition from asymmetric Laguerre-Gaussian beam to Bose-Einstein Condensate