Rina Kanamoto

Recently, a method has been proposed to detect the rotation of a ring Bose-Einstein condensate, in situ, in real-time, and with minimal destruction by using a cavity driven with optical fields carrying orbital angular momentum [Phys. Rev. Lett. 127, 113601 (2021)]. This method is sensitive to the magnitude of the condensate winding number but not its sign.

We present numerical simulations of the cavity optomechanical detection of persistent currents and bright solitons in an atomic Bose-Einstein condensate confined in a ring trap. This paper describes a technique that measures condensate rotation in situ, in real time, and with minimal destruction, in contrast to currently used methods, all of which destroy the condensate completely.

Abstract Atomic superfluids confined in a ring provide a remarkable paradigm for quantized circulation. Very recently, a technique based on cavity optomechanics has been proposed [Kumar et al., Phys. Rev. Lett. 127, 113601 (2021)] for sensing and manipulating the rotation of a bosonic ring condensate with minimal destruction, in situ and in real time. Here, we theoretically investigate other coherent interference effects that can be supported by the proposed configuration.