Enhancement in temperature sensing of a reservoir by Kerr-nonlinear resonator

• URL: http://arxiv.org/abs/2412.16650v1
• Date: Sat, 21 Dec 2024 14:43:09 GMT
• Title: Enhancement in temperature sensing of a reservoir by Kerr-nonlinear resonator
• Authors: Naeem Akhtar, Jia-Xin Peng, Xiaosen Yang, Yuanping Chen,
• Abstract summary: We introduce an estimation technique to precisely measure the temperature of a quantum reservoir using a Kerr-nonlinear resonator with drive. We observe that increasing the Kerr nonlinearity coefficient and driving amplitude significantly enhances precision in the temperature estimation.
• Score: 0.19999259391104385
• License:
• Abstract: The challenge of developing high-precision temperature sensors is an important issue that has recently received a lot of attention. In this work, we introduce an estimation technique to precisely measure the temperature of a quantum reservoir using a Kerr-nonlinear resonator with drive. Thermalization in our suggested protocol is assessed using Uhlmann-Jozsa fidelity, and then we utilize quantum Fisher information to evaluate the metrological potential of our thermometry scheme. We observe that increasing the Kerr nonlinearity coefficient and driving amplitude significantly enhances precision in the temperature estimation. Furthermore, we also explore the underlying physical mechanisms by analyzing probe purity in the steady state and evaluating the performance of homodyne versus heterodyne detection methods. Our results demonstrate that neither of these Gaussian measurements is optimal; instead, optimal homodyne detection always surpasses heterodyne detection.

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