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Q: Fachverband Quantenoptik und Photonik

Q 31: Precision Measurements: Atom Interferometry I (joint session Q/A)

Q 31.1: Vortrag

Mittwoch, 8. März 2023, 11:00–11:15, F102

Ultracold matter trapped by light singularities and quantum noise. — •Alexey Okulov — Moscow, Russia

Superfluids within helical boundaries are interesting from the point of view of low dimensional physics, phase transitions and inertial sensors. The sensitivity to the ultraslow motions of reference frame is limited by an unavoidable zero-point fluctuations. The basic uncertainty relations induce the phase uncertainty by corresponding fluctuations of the particles amount in ultracold ensemble. Hopefully there exists an opportunity to reduce the phase uncertainty by means of the proper structuring of the boundaries geometry. Our aim is to present the convincing arguments in favour of usage the helical laser traps formed by the counterpropagating Laguerre-Gaussian optical vortices to reduce the restrictions on phase deviations. The evaluation of the phase uncertainty with multimode coherent states approach leads to the optimistic result that phase measurement accuracy may be improved by a factor containing $2 \ell$, where $\ell$ is the topological charge of LG vortices, compared to the conventional nontwisted trap geometries. Recent advances in development of highly charged optical vortices with $\ell = 10^3-10^4$ open the opportunity to improve the sensitivity to reference frame slow motions by several orders of magnitude.