Jared H Cole and Lloyd C L Hollenberg 2009 Nanotechnology 20 495401 doi:10.1088/0957-4484/20/49/495401
Jared H Cole1,2 and Lloyd C L Hollenberg1
Show affiliationsThe 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 components required to realize the simplest version of this device (characterization and measurement of qubits, nanoscale positioning) have already been demonstrated experimentally.
03.65.Yz Decoherence; open systems; quantum statistical methods
61.72.J- Point defects and defect clusters
87.15.-v Biomolecules: structure and physical properties
03.67.Lx Quantum computation architectures and implementations
Issue 49 (9 December 2009)
Received 10 July 2009, in final form 23 October 2009
Published 11 November 2009
Jared H Cole and Lloyd C L Hollenberg 2009 Nanotechnology 20 495401
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