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

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2011

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Rudner, Mark
Flensberg, Karsten

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http://nbn-resolving.de/urn:nbn:de:bsz:352-192440
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http://arxiv.org/abs/1110.4893v1

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Zusammenfassung

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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ISO 690PÁLYI, András, Philipp STRUCK, Mark RUDNER, Karsten FLENSBERG, Guido BURKARD, 2011. Spin-orbit induced strong coupling of a single spin to a nanomechanical resonator
BibTex
@unpublished{Palyi2011Spino-19244,
  year={2011},
  title={Spin-orbit induced strong coupling of a single spin to a nanomechanical resonator},
  author={Pályi, András and Struck, Philipp and Rudner, Mark and Flensberg, Karsten and Burkard, Guido}
}
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    <dcterms:abstract xml:lang="eng">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.</dcterms:abstract>
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