Phonon squeezing in a superconducting molecular transistor

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 by variational analysis. The Josephso...

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Bibliographic Details
Published in:Physical review letters 2006-11, Vol.97 (19), p.196801-196801, Article 196801
Main Authors: Zazunov, A, Feinberg, D, Martin, T
Format: Article
Language:English
Subjects:
Condensed Matter
Mesoscopic Systems and Quantum Hall Effect
Physics
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Summary: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 by variational analysis. 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 nonclassical phonon states are briefly discussed.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.97.196801