Single-spin qubit magnetic spectroscopy of the correlated states of electrons //

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 electron system. I will discuss how this noise can be used to investigate different types of electronic states, including superconductors, ferro- and antiferromagnetic insulators, spin liquid states. I will also discuss prospects for exploring magnon hydrodynamics using this technique.