Publikation: Creating arbitrary quantum vibrational states in a carbon nanotube
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We theoretically study the creation of single- and multi-phonon Fock states and arbitrary superpositions of quantum phonon states in a nanomechanical carbon nanotube (CNT) resonator. In our model, a doubly clamped CNT resonator is initialized in the ground state and a single electron is trapped in a quantum dot which is formed by a electric gate potential and brought into the magnetic field of a micro-magnet. The preparation of arbitrary quantum phonon states is based on the coupling between the mechanical motion of the CNT and the electron spin which acts as a non-linearity. We assume that electrical driving pulses with different frequencies are applied on the system. The quantum information is transferred from the spin qubit to the mechanical motion by the spin-phonon coupling and the electron spin qubit can be reset by the single-electron spin resonance. We describe Wigner tomography which can be applied at the end to obtain the phase information of the prepared phonon states.
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WANG, Heng, Guido BURKARD, 2016. Creating arbitrary quantum vibrational states in a carbon nanotube. In: Physical Review B. 2016, 94(20), 205413. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.94.205413BibTex
@article{Wang2016-08-10T07:52:38ZCreat-36044,
year={2016},
doi={10.1103/PhysRevB.94.205413},
title={Creating arbitrary quantum vibrational states in a carbon nanotube},
number={20},
volume={94},
issn={2469-9950},
journal={Physical Review B},
author={Wang, Heng and Burkard, Guido},
note={Article Number: 205413}
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<dcterms:abstract xml:lang="eng">We theoretically study the creation of single- and multi-phonon Fock states and arbitrary superpositions of quantum phonon states in a nanomechanical carbon nanotube (CNT) resonator. In our model, a doubly clamped CNT resonator is initialized in the ground state and a single electron is trapped in a quantum dot which is formed by a electric gate potential and brought into the magnetic field of a micro-magnet. The preparation of arbitrary quantum phonon states is based on the coupling between the mechanical motion of the CNT and the electron spin which acts as a non-linearity. We assume that electrical driving pulses with different frequencies are applied on the system. The quantum information is transferred from the spin qubit to the mechanical motion by the spin-phonon coupling and the electron spin qubit can be reset by the single-electron spin resonance. We describe Wigner tomography which can be applied at the end to obtain the phase information of the prepared phonon states.</dcterms:abstract>
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