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This study introduces a quantum metrology protocol using a quantum Jahn-Teller system for precise frequency and force measurements. The system demonstrates robustness against decoherence, enabling high-precision quantum estimation.

Keywords:
periodic modulationquantum sensingtrapped ions

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Area of Science:

  • Quantum Metrology
  • Quantum Optics
  • Condensed Matter Physics

Background:

  • Quantum systems offer enhanced precision for measurements.
  • The quantum Jahn-Teller effect is a phenomenon in molecular and solid-state physics.
  • Spin decoherence limits the precision of quantum measurements.

Purpose of the Study:

  • To propose a novel quantum metrology protocol for measuring frequencies and weak forces.
  • To investigate the potential of a modulated quantum Jahn-Teller system for high-precision quantum estimation.
  • To demonstrate the robustness of the proposed system against spin decoherence.

Main Methods:

  • Utilizing a periodic modulating quantum Jahn-Teller system with a single spin and two bosonic modes.
  • Deriving an effective Hamiltonian describing spin-dependent interactions between bosonic modes.
  • Analyzing the system's critical behavior in the high-frequency drive and low bosonic frequency limit.

Main Results:

  • The effective Hamiltonian reveals spin-dependent interactions between bosonic modes.
  • The quantum Jahn-Teller system exhibits critical behavior suitable for high-precision quantum estimation.
  • The protocol shows robustness against spin decoherence, overcoming limitations of spin dephasing time.

Conclusions:

  • The proposed quantum metrology protocol offers a robust and precise method for measuring frequencies and weak forces.
  • The critical behavior of the quantum Jahn-Teller system is key to achieving high-precision quantum estimation.
  • This approach advances quantum sensing by mitigating decoherence effects.