Magnetic Spectroscopy of Solid-State Systems with Single-Spin Qubits
ORAL · Invited
Abstract
A single-spin qubit placed near the surface of a material acquires an additional contribution to its relaxation rate due to magnetic noise created by the low-energy excitations of the electronic system. I will discuss how this noise can be used to investigate quasiparticles and vortices in superconductors and the dynamics of magnons in ferromagnetic insulators. I will also review extensions of this technique to the measurement of higher-order magnetic noise cumulants and correlation spectroscopy with two qubits.
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Publication: Phys. Rev. Research 4, L012001 (2022). Single-spin qubit magnetic spectroscopy of two dimensional superconductivity.
Phys. Rev. B 110, 144518 (2024). Probing the Berezinskii-Kosterlitz-Thouless vortex unbinding transition in two-dimensional superconductors using local noise magnetometry.
arXiv:2403.01057. Magnon hydrodynamics in an atomically-thin ferromagnet.
arXiv:2505.03877. Non-Gaussian Noise Magnetometry Using Local Spin Qubits.
Presenters
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Eugene Demler
- ETH Zurich