Phonon Squeezing in a Superconducting Molecular Transistor

Details Phonon Squeezing in a Superconducting Molecular Transistor Phonon Squeezing in a Superconducting Molecular Transistor

2006-06-21

arxiv.org/abs/cond-mat/0606548v2

Physical Review Letters 97 (2006-11-09) 196801

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevLett.97.196801

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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