Spin-orbit induced strong coupling of a single spin to a nanomechanical resonator

Details Spin-orbit induced strong coupling of a single spin to a nanomechanical resonator Spin-orbit induced strong coupling of a single spin to a nanomechanical resonator

2011-10-21

arxiv.org/abs/1110.4893v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 3 figures + appendix

Scientific paper

We theoretically investigate the coupling of electron spin to vibrational motion due to curvature-induced spin-orbit coupling in suspended carbon nanotube quantum dots. Our estimates indicate that, with current capabilities, a quantum dot with an odd number of electrons can serve as a realization of the Jaynes-Cummings model of quantum electrodynamics in the strong-coupling regime. A quantized flexural mode of the suspended tube plays the role of the optical mode and we identify two distinct two-level subspaces, at small and large magnetic field, which can be used as qubits in this setup. The strong intrinsic spin-mechanical coupling allows for detection, as well as manipulation of the spin qubit, and may yield enhanced performance of nanotubes in sensing applications.

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