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Local noise spectroscopy of Wigner crystals in two-dimensional materials

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arxiv 2308.16243 v1 pith:65ZKKFS6 submitted 2023-08-30 cond-mat.str-el cond-mat.dis-nn

Pavel E. Dolgirev , Ilya Esterlis , Alexander A. Zibrov , Mikhail D. Lukin , Thierry Giamarchi , Eugene Demler This is my paper · ORCID
classification cond-mat.str-elcond-mat.dis-nn
keywords noiselocalcrystalspectroscopywignercrystalssample-probetwo-dimensional
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We propose to use local electromagnetic noise spectroscopy as a versatile and noninvasive tool to study Wigner crystal phases of strongly-interacting two-dimensional electronic systems. In-plane imaging of the local noise is predicted to enable single-site resolution of the electron crystal when the sample-probe distance is less than the inter-electron separation. At larger sample-probe distances, noise spectroscopy encodes information about the low-energy Wigner crystal phonons, including the dispersion of the transverse shear mode, the pinning resonance due to disorder, and optical modes emerging, for instance, in bilayer crystals. We discuss the potential utility of local noise probes in analyzing the rich set of phenomena expected to occur in the vicinity of the melting transition.

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  1. Non-Gaussian Noise Magnetometry Using Local Spin Qubits

    quant-ph 2025-05 conditional novelty 6.0 of 10

    A single NV spin qubit and two-qubit coincidence or Bell-state echoes can isolate fourth-order magnetic noise cumulants, demonstrated on telegraph-noise and critical Ising models.

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