Enhanced Parameter Estimation with Periodically Driven Quantum Probe

TL;DR

This paper introduces a quantum metrology protocol utilizing a periodically driven quantum Jahn-Teller system, enabling high-precision measurements of frequencies and weak forces with robustness against spin decoherence.

Contribution

It presents a novel quantum estimation scheme based on a driven Jahn-Teller system, highlighting its robustness and potential for high-precision measurements.

Findings

Effective Hamiltonian describes spin-dependent bosonic interactions.

System exhibits critical behavior at high-frequency drive.

Robustness against spin decoherence enables longer measurement times.

Abstract

We propose a quantum metrology protocol for measuring frequencies and weak forces based on a periodic modulating quantum Jahn-Teller system composed of a single spin interacting with two bosonic modes. We show that in the first order of the frequency drive the time-independent effective Hamiltonian describes spin-dependent interaction between the two bosonic modes. In the limit of high-frequency drive and low bosonic frequency the quantum Jahn-Teller system exhibits critical behaviour which can be used for high-precision quantum estimation. A major advantage of our scheme is the robustness of the system against spin decoherence which allows to perform parameter estimations with measurement time not limited by spin dephasing.