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arXiv · 2111.09315

Noise Electrometry of Polar and Dielectric Materials

Rahul Sahay·Pavel A. Volkov·Satcher Hsieh·Eric Parsonnet·Lane W. Martin·Ramamoorthy Ramesh·Norman Y. Yao·Shubhayu Chatterjee
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Abstract

A qubit sensor with an electric dipole moment acquires an additional contribution to its depolarization rate when it is placed in the vicinity of a polar or dielectric material as a consequence of electrical noise arising from polarization fluctuations in the latter. Here, we characterize this relaxation rate as a function of experimentally tunable parameters such as sample-probe distance, probe-frequency, and temperature, and demonstrate that it offers a window into dielectric properties of insulating materials over a wide range of frequencies and length scales. We discuss the experimental feasibility of our proposal and illustrate its ability to probe a variety of phenomena, ranging from collective polar excitations to phase transitions and disorder-dominated physics in relaxor ferroelectrics. Our proposal paves the way for a novel table-top probe of polar and dielectric materials in a parameter regime complementary to existing tools and techniques.

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Rahul Sahay, Pavel A. Volkov, Satcher Hsieh, Eric Parsonnet, Lane W. Martin, Ramamoorthy Ramesh, Norman Y. Yao, Shubhayu Chatterjee. 2021-11-17. Noise Electrometry of Polar and Dielectric Materials. https://arxiv.org/abs/2111.09315

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