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Phonon Squeezing in a Superconducting Molecular Transistor | | A. Zazunov
; D. Feinberg
; Thierry Martin
; PostScript
; PDF
; Other formats
; | | Date: |
21 Jun 2006 | | Subject: | Mesoscopic Systems and Quantum Hall Effect | | Abstract: | Josephson transport through a double junction formed by a single molecule or carbon nanotube is considered in the presence of a local vibrational mode which is linearly coupled to the charge on the molecule. An exact solution is obtained in the limit of a large superconducting gap, and it is complemented by a variational analysis in the general case. Coherent charge fluctuations involve polaron dressing and are entangled with non-classical phonon states. The flow of a Josephson current induces squeezing of the phonon mode, controlled by the superconducting phase difference and by the junction asymmetry. Squeezing is maximal in the polaron crossover regime, where a nearly minimum-uncertainty state with about 40 per cent squeezing can be obtained. Optical probes of non-classical states are briefly discussed. | | Source: | arXiv, cond-mat/0606548 | | Services: | Forum | Review | PDF | Favorites | |
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