We propose a torsional resonator that couples to the transverse spin dipole of an attached sample. The absence of relative motion eliminates a source of friction that would otherwise hinder nanoscale implementation. Enhanced spontaneous emission induced by the resonator relaxes the longitudinal spin dipole at a rate of ∼1 s⁻¹ in the low-temperature limit. With signal averaging, single-proton magnetic resonance spectroscopy appears feasible at ∼10 mK and a high magnetic field, while single-shot sensitivity is practical for samples with at least tens of protons in a volume of ∼5 nm³.
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| http://dx.doi.org/10.1103/PhysRevLett.105.177601 | DOI Listing |
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