Regensburg 2013 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 72: Nanomechanics (jointly with BP, DF, and DY)

TT 72.3: Vortrag

Freitag, 15. März 2013, 11:15–11:30, H20

Mechanical read-out of a single electron spin in a carbon nanotube — •Philipp Struck, Heng Wang, and Guido Burkard — Universität Konstanz

The spin of a single electron in a suspended carbon nanotube can be read out by using its coupling to the nano-mechanical 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 [1]. We simulate the response of the system to the external driving with a Jaynes-Cummings model by solving the quantum master equation. Using parameters comparable to those used in recent experiments, we calculate how information of the spin state of the system is imprinted on the mechanical motion. By measuring the current through a close-by charge sensor, the spin state can be read out. We show that the effect is measurable with current experimental expertise.
[1] A. Palyi, P. R. Struck, M. Rudner, K. Flensberg, and G. Burkard, Phys. Rev. Lett. 108, 206811 (2012)