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Autoionization-Enhanced Rydberg Dressing by Fast Contaminant Removal.

Alec Cao1, Theodor Lukin Yelin1, William J Eckner1

  • 1University of Colorado, National Institute of Standards and Technology, JILA, University of Colorado and , and Department of Physics, Boulder, Colorado 80309, USA.

Physical Review Letters
|April 18, 2025
PubMed
Summary
This summary is machine-generated.

We developed a method using autoionization to remove unwanted Rydberg atoms, significantly improving entanglement generation in atomic clocks. This technique enhances atom lifetimes and spin-squeezing, enabling new quantum computing applications.

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Area of Science:

  • Quantum Information Science
  • Atomic Physics
  • Quantum Computing

Background:

  • Rydberg dressing is crucial for generating entanglement in atomic states.
  • Collective loss due to blackbody radiation-induced transitions to contaminant Rydberg states limits current techniques.

Purpose of the Study:

  • To demonstrate rapid removal of contaminant Rydberg states using autoionization (AI).
  • To enhance the lifetime and duty cycle of stroboscopic Rydberg dressing (SRD) for quantum information processing.
  • To improve spin-squeezing in atomic qubits using AI-enhanced SRD.

Main Methods:

  • Utilized autoionization (AI) transitions in alkaline-earth-like atoms for contaminant removal.
  • Integrated AI pulses into a stroboscopic Rydberg dressing (SRD) sequence.
  • Applied the AI-enhanced SRD protocol to an array of up to 144 optical clock qubits.

Main Results:

  • Achieved an order of magnitude enhancement in Rydberg dressing lifetimes.
  • Maintained an order of magnitude larger duty cycle compared to previous methods.
  • Demonstrated improved spin-squeezing during early time dressing dynamics.

Conclusions:

  • Autoionization effectively removes contaminant Rydberg states, compatible with coherent qubit operations.
  • AI-enhanced SRD significantly improves lifetimes and duty cycles, approaching fundamental limits.
  • This approach enables previously infeasible Rydberg dressing proposals for quantum technologies.