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Variational Spin-Squeezing Algorithms on Programmable Quantum Sensors.

Raphael Kaubruegger1,2, Pietro Silvi1,2, Christian Kokail1,2

  • 1Center for Quantum Physics, University of Innsbruck, Innsbruck A-6020, Austria.

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This study introduces variational quantum algorithms for optical tweezer arrays, enabling on-demand entangled states for enhanced precision metrology. The method optimizes quantum resources for robust, noise-resilient performance, surpassing existing protocols.

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Area of Science:

  • Quantum Information Science
  • Atomic Physics
  • Quantum Sensing

Background:

  • Optical tweezer arrays offer programmable quantum simulation and sensing capabilities.
  • Entangled states are crucial for precision metrology and quantum information processing.

Purpose of the Study:

  • To propose variational quantum algorithms for generating entangled states on demand in optical tweezer arrays.
  • To achieve metrological enhancement through on-device optimization of quantum resources.

Main Methods:

  • Tailoring variational quantum algorithms for programmable quantum sensors in tweezer arrays.
  • Utilizing Rydberg dressing for finite-range interactions in strontium (Sr) atom arrays.
  • Implementing a feedback loop for on-device optimization of entangled state preparation.

Main Results:

  • Demonstrated generation of entangled states for precision metrology.
  • Showcased robustness to noise through numerical simulations.
  • Achieved performance surpassing known quantum metrology protocols.

Conclusions:

  • The proposed variational quantum algorithms are suitable for programmable quantum sensors in optical tweezer arrays.
  • The on-device optimization scheme offers a scalable and robust approach for preparing optimal entangled states.
  • This work advances the capabilities of atomic quantum sensors for precision measurements.