Phonon Josephson junction with nanomechanical resonators

S. Barzanjeh, D. Vitali, Physical Review A - Atomic, Molecular, and Optical Physics 93 (2016).


Journal Article | Published | English
Author
Department
Abstract
We study coherent phonon oscillations and tunneling between two coupled nonlinear nanomechanical resonators. We show that the coupling between two nanomechanical resonators creates an effective phonon Josephson junction, which exhibits two different dynamical behaviors: Josephson oscillation (phonon-Rabi oscillation) and macroscopic self-trapping (phonon blockade). Self-trapping originates from mechanical nonlinearities, meaning that when the nonlinearity exceeds its critical value, the energy exchange between the two resonators is suppressed, and phonon Josephson oscillations between them are completely blocked. An effective classical Hamiltonian for the phonon Josephson junction is derived and its mean-field dynamics is studied in phase space. Finally, we study the phonon-phonon coherence quantified by the mean fringe visibility, and show that the interaction between the two resonators may lead to the loss of coherence in the phononic junction.
Publishing Year
Date Published
2016-03-28
Journal Title
Physical Review A - Atomic, Molecular, and Optical Physics
Acknowledgement
The work of S.B. has been supported by the European Commission (Belgium) via the SCALEQIT program and by the Alexander von Humboldt Foundation.
Volume
93
Issue
3
Article Number
033846
IST-REx-ID

Cite this

Barzanjeh S, Vitali D. Phonon Josephson junction with nanomechanical resonators. Physical Review A - Atomic, Molecular, and Optical Physics. 2016;93(3). doi:10.1103/PhysRevA.93.033846
Barzanjeh, S., & Vitali, D. (2016). Phonon Josephson junction with nanomechanical resonators. Physical Review A - Atomic, Molecular, and Optical Physics, 93(3). https://doi.org/10.1103/PhysRevA.93.033846
Barzanjeh, Shabir, and David Vitali. “Phonon Josephson Junction with Nanomechanical Resonators.” Physical Review A - Atomic, Molecular, and Optical Physics 93, no. 3 (2016). https://doi.org/10.1103/PhysRevA.93.033846.
S. Barzanjeh and D. Vitali, “Phonon Josephson junction with nanomechanical resonators,” Physical Review A - Atomic, Molecular, and Optical Physics, vol. 93, no. 3, 2016.
Barzanjeh S, Vitali D. 2016. Phonon Josephson junction with nanomechanical resonators. Physical Review A - Atomic, Molecular, and Optical Physics. 93(3).
Barzanjeh, Shabir, and David Vitali. “Phonon Josephson Junction with Nanomechanical Resonators.” Physical Review A - Atomic, Molecular, and Optical Physics, vol. 93, no. 3, 033846, American Physical Society, 2016, doi:10.1103/PhysRevA.93.033846.

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