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  • Letter

Observation of coherent oscillations in the association of dimers from a thermal gas of ultracold atoms

Roy Elbaz1, Yaakov Yudkin1, P. Giannakeas2, Jan-Michael Rost2, Chris H. Greene3,4, and Lev Khaykovich1

  • 1Department of Physics, QUEST Center and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
  • 2Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, 01187 Dresden, Germany
  • 3Department of Physics and Astronomy, Purdue University, West Lafayette, Indiana 47907, USA
  • 4Purdue Quantum Science and Engineering Institute, Purdue University, West Lafayette, Indiana 47907, USA

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Phys. Rev. A 107, L031304 – Published 20 March, 2023

DOI: https://doi.org/10.1103/PhysRevA.107.L031304

Abstract

We report the observation of coherent oscillations in conversion efficiency of weakly bound dimers formed from a thermal gas of ultracold atoms. Finite thermal energy of the gas causes loss of coherence when a broad continuum is resonantly coupled to a discrete bound state. Restoration of the coherence can be achieved through nonadiabatic transitions of the dressed molecular energy level that are induced by a strong modulation pulse with fast envelope dynamics. Conditions to observe coherent oscillations are verified and control of their properties is demonstrated. The main experimental findings are supported by theoretical modeling and numerical calculations. The observed results may lead to a renewed interest in general studies of a discrete energy level coupled to a broadband continuum when the properties of both are fully controlled.

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Phys. Rev. A 107, L031304– Published 20 March, 2023
  • Received 11 September 2022
  • Accepted 3 March 2023
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