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Phonon Squeezing in a Superconducting Molecular Transistor

A. Zazunov·D. Feinberg·Thierry Martin
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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.

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A. Zazunov, D. Feinberg, Thierry Martin. 2006-09-28. Phonon Squeezing in a Superconducting Molecular Transistor. https://doi.org/10.1103/physrevlett.97.196801

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