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arXiv · 1110.4893

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

András Pályi·P. R. Struck·Mark Rudner·Karsten Flensberg·Guido Burkard
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Abstract

We theoretically investigate the deflection-induced coupling of an electron spin to vibrational motion due to 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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András Pályi, P. R. Struck, Mark Rudner, Karsten Flensberg, Guido Burkard. 2012-06-04. Spin-orbit-induced strong coupling of a single spin to a nanomechanical resonator. https://doi.org/10.1103/physrevlett.108.206811

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