Quantum metrology based on strongly correlated matter. (arXiv:1801.00042v1 [quant-ph])

We propose and analyze a new method for quantum metrology based on stable
non-equilibrium states of quantum matter. Our approach utilizes quantum
correlations stabilized by strong interactions and periodic driving. As an
example, we present an explicit protocol to perform Floquet enhanced
measurements of an oscillating magnetic field in Ising-interacting spin
systems. Our protocol allows one to circumvent the interaction-induced
decoherence associated with high density spin ensembles and is robust to the
presence of noise and imperfections. Applications to nanoscale magnetic sensing
and precision measurements are discussed.

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