title: Spin-orbit-induced strong coupling of a single spin to a nanomechanical resonator.
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.
authors.affiliation: Department of Physics, University of Konstanz, D-78457 Konstanz, Germany.
authors.forename: András
authors.initials: A
authors.lastname: Pályi
authors.forename: P R
authors.initials: PR
authors.lastname: Struck
authors.forename: Mark
authors.initials: M
authors.lastname: Rudner
authors.forename: Karsten
authors.initials: K
authors.lastname: Flensberg
authors.forename: Guido
authors.initials: G
authors.lastname: Burkard