Persistent current oscillations in a double-ring quantum gas

by T. Bland, I. V. Yatsuta, M. Edwards, Y. O. Nikolaieva, A. O. Oliinyk, A. I. Yakimenko, N. P. Proukakis

Abstract:

Vorticity in closed quantum fluid circuits is known to arise in the form of persistent currents. In this work, we develop a method to engineer transport of the quantized vorticity between density-coupled ring-shaped atomic Bose-Einstein condensates in experimentally accessible regimes. Introducing a tunable weak link between the rings, we observe and characterize the controllable periodic transfer of the current and investigate the role of temperature on suppressing these oscillations via a range of complementary state-of-the-art numerical methods. Our setup paves the way for precision measurements of local acceleration and rotation.

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Reference:

Persistent current oscillations in a double-ring quantum gas,
T. Bland, I. V. Yatsuta, M. Edwards, Y. O. Nikolaieva, A. O. Oliinyk, A. I. Yakimenko, N. P. Proukakis,
Phys. Rev. Research, 4, 043171, 2022.

Bibtex Entry:

@article{bland2022persistent,

      title={Persistent current oscillations in a double-ring quantum gas}, 

      author={Bland, T. and Yatsuta, I. V. and Edwards, M. and Nikolaieva, Y. O. and Oliinyk, A. O. and Yakimenko, A. I. and Proukakis, N. P.},

      year={2022},

	  month = {Dec},

      eprint={2204.14120},

      archivePrefix={arXiv},

      primaryClass={cond-mat.quant-gas},

	  journal={Phys. Rev. Research},

volume = {4},

pages = {043171},

	  abstract = {Vorticity in closed quantum fluid circuits is known to arise in the form of persistent currents. In this work, we
develop a method to engineer transport of the quantized vorticity between density-coupled ring-shaped atomic
Bose-Einstein condensates in experimentally accessible regimes. Introducing a tunable weak link between the
rings, we observe and characterize the controllable periodic transfer of the current and investigate the role of
temperature on suppressing these oscillations via a range of complementary state-of-the-art numerical methods.
Our setup paves the way for precision measurements of local acceleration and rotation.},

	  url = {https://journals.aps.org/prresearch/abstract/10.1103/PhysRevResearch.4.043171},

	  arXiv = {http://arxiv.org/abs/2204.14120}

}