Spin-Orbit-Induced Strong Coupling of a Single Spin to a Nanomechanical Resonator
Open Access
- 18 May 2012
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 108 (20), 206811
- https://doi.org/10.1103/physrevlett.108.206811
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. DOI: http://dx.doi.org/10.1103/PhysRevLett.108.206811 © 2012 American Physical SocietyKeywords
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Funding Information
- National Science Foundation
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