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Finite-range bias in fitting three-body loss to the zero-range model

Sofia Agafonova, Mikhail Lemeshko, and Artem G. Volosniev

  • Institute of Science and Technology Austria (ISTA), Am Campus 1, 3400 Klosterneuburg, Austria

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Phys. Rev. A 107, L061304 – Published 20 June, 2023

DOI: https://doi.org/10.1103/PhysRevA.107.L061304

Abstract

We study the impact of finite-range physics on the zero-range-model analysis of three-body recombination in ultracold atoms. We find that temperature dependence of the zero-range parameters can vary from one set of measurements to another as it may be driven by the distribution of error bars in the experiment, and not by the underlying three-body physics. To study finite-temperature effects in three-body recombination beyond the zero-range physics, we introduce and examine a finite-range model based upon a hyperspherical formalism. The systematic error discussed in this Letter may provide a significant contribution to the error bars of measured three-body parameters.

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Phys. Rev. A 107, L061304– Published 20 June, 2023
  • Received 14 February 2023
  • Accepted 24 May 2023
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