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Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
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A versatile microwave source for cold atom experiments controlled by a field programmable gate array.

Isaiah Morgenstern1, Shan Zhong1, Qimin Zhang1

  • 1Homer L. Dodge Department of Physics and Astronomy, The University of Oklahoma, 440 W. Brooks St., Norman, Oklahoma 73019, USA.

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|March 2, 2020
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This summary is machine-generated.

We developed a precise microwave source using a field-programmable gate array (FPGA) for controlling microwave-dressing on cold atoms. This system successfully demonstrated Rabi oscillations in a sodium Bose-Einstein condensate.

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Area of Science:

  • Atomic physics
  • Quantum optics
  • Experimental apparatus development

Background:

  • Precise control over microwave fields is crucial for manipulating quantum states of cold atoms.
  • Existing methods for generating time-dependent microwave-dressing can be complex and lack flexibility.

Purpose of the Study:

  • To present a novel, FPGA-controlled microwave source for precise time-dependent microwave-dressing.
  • To demonstrate the utility of this system for quantum control experiments with cold atoms.

Main Methods:

  • Utilized a commercially available field-programmable gate array (FPGA) for real-time control of microwave generation.
  • Implemented the system to apply microwave-dressing to trapped sodium atoms in a Bose-Einstein condensate.
  • Excited Rabi oscillations to characterize the performance of the microwave source.

Main Results:

  • Achieved precise temporal control over the applied microwave field.
  • Successfully observed and characterized Rabi oscillations in a Na spinor Bose-Einstein condensate.
  • The developed system provides a flexible and accessible platform for quantum control.

Conclusions:

  • FPGA-based control offers a powerful and accessible method for generating precise microwave signals in atomic physics experiments.
  • The presented microwave source facilitates advanced quantum manipulation of cold atoms, such as in Bose-Einstein condensates.
  • Open-source code and schematics are provided to enable widespread adoption and replication.