Quantum state engineering with circuit electromechanical three-body interactions

Mehdi Abdi, Matthias Pernpeintner, Rudolf Gross, Hans Huebl, Michael J Hartmann

Research output: Contribution to journalLetter

23 Citations (Scopus)
453 Downloads (Pure)

Abstract

We propose a hybrid system with quantum mechanical three-body interactions between photons, phonons, and qubit excitations. These interactions take place in a circuit quantum electrodynamical architecture with a superconducting microwave resonator coupled to a transmon qubit whose shunt capacitance is free to mechanically oscillate. We show that this system design features a three-mode polariton-mechanical mode and a nonlinear transmon-mechanical mode interaction in the strong coupling regime. Together with the strong resonator-transmon interaction, these properties provide intriguing opportunities for manipulations of this hybrid quantum system. We show, in particular, the feasibility of cooling the mechanical motion down to its ground state and preparing various nonclassical states including mechanical Fock and cat states and hybrid tripartite entangled states.
Original languageEnglish
Article number173602
JournalPhysical Review Letters
Volume114
Issue number17
DOIs
Publication statusPublished - 28 Apr 2015

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