Abdi Mehdi, Pernpeintner Matthias, Gross Rudolf, Huebl Hans, Hartmann Michael J
Physik Department, Technische Universität München, James-Franck-Straße, 85748 Garching, Germany.
Walther-Meißner-Institut, Bayerische Akademie der Wissenschaften, Walther-Meißner-Straße 8, 85748 Garching, Germany.
Phys Rev Lett. 2015 May 1;114(17):173602. doi: 10.1103/PhysRevLett.114.173602. Epub 2015 Apr 28.
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.
我们提出了一种具有光子、声子和量子比特激发之间量子力学三体相互作用的混合系统。这些相互作用发生在一个电路量子电动力学架构中，该架构有一个超导微波谐振器与一个跨导量子比特耦合，其并联电容可自由地进行机械振荡。我们表明，这种系统设计在强耦合 regime 中具有三模极化激元 - 机械模式和非线性跨导 - 机械模式相互作用。连同强谐振器 - 跨导相互作用，这些特性为操纵这个混合量子系统提供了有趣的机会。我们特别展示了将机械运动冷却到其基态并制备各种非经典态的可行性，包括机械福克态和猫态以及混合三方纠缠态。
