Department of Physics, ETH Zurich, CH-8093, Zurich, Switzerland.
Phys Rev Lett. 2010 Mar 12;104(10):100504. doi: 10.1103/PhysRevLett.104.100504. Epub 2010 Mar 10.
We present the realization of a cavity quantum electrodynamics setup in which photons of strongly different lifetimes are engineered in different harmonic modes of the same cavity. We achieve this in a superconducting transmission line resonator with superconducting qubits coupled to the different modes. One cavity mode is strongly coupled to a detection line for qubit state readout, while a second long lifetime mode is used for photon storage and coherent quantum operations. We demonstrate sideband-based measurement of photon coherence, generation of n photon Fock states and the scaling of the sideband Rabi frequency with square root of n using a scheme that may be extended to realize sideband-based two-qubit logic gates.
我们展示了一种腔量子电动力学装置的实现，其中具有不同寿命的光子被设计在同一腔的不同谐频模式中。我们在一个超导传输线谐振器中实现了这一点，其中超导量子比特与不同模式耦合。一个腔模式与用于量子比特状态读出的检测线强耦合，而第二个长寿命模式用于光子存储和相干量子操作。我们使用一种方案证明了光子相干性的边带测量、n 光子福克态的产生以及边带拉比频率与 n 的平方根的比例关系，该方案可以扩展到实现基于边带的两量子比特逻辑门。
