Criticality-enhanced Electric Field Gradient Sensor with Single Trapped Ions

• URL: http://arxiv.org/abs/2304.02050v2
• Date: Wed, 10 Apr 2024 18:47:46 GMT
• Title: Criticality-enhanced Electric Field Gradient Sensor with Single Trapped Ions
• Authors: Theodoros Ilias, Dayou Yang, Susana F. Huelga, Martin B. Plenio,
• Abstract summary: We propose and analyze a driven-dissipative quantum sensor that is continuously monitored close to a dissipative critical point. The device achieves highly precise sensing of oscillating electric field gradients at a criticality-enhanced precision scaling beyond the standard quantum limit.
• Score: 0.7499722271664147
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We propose and analyze a driven-dissipative quantum sensor that is continuously monitored close to a dissipative critical point. The sensor relies on the critical open Rabi model with the spin and phonon degrees of freedom of a single trapped ion to achieve criticality-enhanced sensitivity. Effective continuous monitoring of the sensor is realized via a co-trapped ancilla ion that switches between dark and bright internal states conditioned on a `jump' of the phonon population which, remarkably, achieves nearly perfect phonon counting despite a low photon collection efficiency. By exploiting both dissipative criticality and efficient continuous readout, the sensor device achieves highly precise sensing of oscillating electric field gradients at a criticality-enhanced precision scaling beyond the standard quantum limit, which we demonstrate is robust to the experimental imperfections in real-world applications.

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