Quantum superpositions of flow states on a ring

Rina Kanamoto, Ewan M. Wright

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


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.

Original languageEnglish (US)
Article number064011
JournalJournal of Optics
Issue number6
StatePublished - Jun 2011


  • Optical vortices
  • Raman coupler
  • cat state
  • quantum superposition

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


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