Journal article

Scanning quantum decoherence microscopy

Jared H Cole, Lloyd CL Hollenberg



The use of qubits as sensitive nanoscale magnetometers has been studied theoretically and recently demonstrated experimentally. In this paper we propose a new concept, in which a scanning two-state quantum system is used to probe a sample through the subtle effects of decoherence. Mapping both the Hamiltonian and decoherence properties of a qubit simultaneously provides a unique image of the magnetic (or electric) field properties at the nanoscale. The resulting images are sensitive to the temporal as well as spatial variation in the fields created by the sample. As examples we theoretically study two applications; one from condensed matter physics, the other biophysics. The individual compo..

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Awarded by Australian Research Council Australian Professorial Fellowship

Funding Acknowledgements

The authors would like to thank N Oxtoby, C Hill, G Milburn and G Schon for useful comments on the manuscript. This work was supported by the Australian Research Council. JHC acknowledges the support of the Alexander von Humboldt Foundation and LCLH is the recipient of an Australian Research Council Australian Professorial Fellowship (DP0770715).