The readout of the fullerene-based quantum computing by a scanning tunneling microscope

Details The readout of the fullerene-based quantum computing by a scanning tunneling microscope The readout of the fullerene-based quantum computing by a scanning tunneling microscope

2006-10-11

arxiv.org/abs/quant-ph/0610083v1

Physics

Quantum Physics

RevTex file, 3 figures. To appear in New Journal of Physics

Scientific paper

10.1088/1367-2630/8/10/252

We consider to detect the electron spin of a doped atom, i.e., a nitrogen or a phosphorus, caged in a fullerene by currently available technique of the scanning tunneling microscope (STM), which actually corresponds to the readout of a qubit in the fullerene-based quantum computing. Under the conditions of polarized STM current and Coulomb blockade, we investigate the tunneling matrix elements involving the exchange coupling between the tunneling polarized electrons and the encapsulated polarized electron, and calculate the variation of the tunneling current with respect to different orientations of the encapsulated electron spin. The experimental feasibility of our scheme is discussed under the consideration of some imperfect factors.

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