Phonon Squeezing in a Superconducting Molecular Transistor
Mesoscale and Nanoscale Physics
2009-11-11 v2
Abstract
Josephson transport through a single molecule or carbon nanotube is considered in the presence of a local vibrational mode coupled to the electronic charge. The ground-state solution is obtained exactly in the limit of a large superconducting gap, and is extended to the general case by variational analysis. Coherent charge fluctuations are entangled with non-classical phonon states. The Josephson current induces squeezing of the phonon mode, which is controlled by the superconducting phase difference and by the junction asymmetry. Optical probes of non-classical phonon states are briefly discussed.
Keywords
Cite
@article{arxiv.cond-mat/0606548,
title = {Phonon Squeezing in a Superconducting Molecular Transistor},
author = {A. Zazunov and D. Feinberg and Thierry Martin},
journal= {arXiv preprint arXiv:cond-mat/0606548},
year = {2009}
}