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Nanomechanical readout of a single spin

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2014

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https://doi.org/10.1103/PhysRevB.89.045404
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Physical Review B. 2014, 89(4), 045404. ISSN 1098-0121. eISSN 1550-235X. Available under: doi: 10.1103/PhysRevB.89.045404

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The spin of a single electron in a suspended carbon nanotube can be read out by using its coupling to the nanomechanical motion of the nanotube. To show this, we consider a single electron confined within a quantum dot formed by the suspended carbon nanotube. The spin-orbit interaction induces a coupling between the spin and one of the bending modes of the suspended part of the nanotube. We calculate the response of the system to pulsed external driving of the mechanical motion using a Jaynes-Cummings model. To account for resonator damping, we solve a quantum master equation, with parameters comparable to those used in recent experiments, and show how information about the spin state of the system can be acquired by measuring the mechanical motion of the nanotube. The latter can be detected by observing the current through a nearby charge sensor.

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ISO 690STRUCK, Philipp, Heng WANG, Guido BURKARD, 2014. Nanomechanical readout of a single spin. In: Physical Review B. 2014, 89(4), 045404. ISSN 1098-0121. eISSN 1550-235X. Available under: doi: 10.1103/PhysRevB.89.045404
BibTex
@article{Struck2014Nanom-32326,
  year={2014},
  doi={10.1103/PhysRevB.89.045404},
  title={Nanomechanical readout of a single spin},
  number={4},
  volume={89},
  issn={1098-0121},
  journal={Physical Review B},
  author={Struck, Philipp and Wang, Heng and Burkard, Guido},
  note={Article Number: 045404}
}
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