关于多比特电路量子动力学系统中光子自由度的消除方案
研究
孟建宇;王培月;冯伟;杨国建;李新奇
【期刊名称】《物理学报》 【年(卷),期】2012(061)024
【摘要】Solid-state superconducting circuit-quantum electrodynamics (QED) system is a promising candidate for quantum information processing and an ideal platform for quantum measurement and quantum control studies. As an extension to our previous simulation for single qubit circuit-QED, in this work we simulate the quantum measurement and control of multi-qubit system. Particularly, we consider the deterministic generation of a two-qubit Bell state. In this context we examine the validity conditions of two cavity- photon-elimination scheme. On the level of quantum trajectory simulation, we find that, owing to the qubit flip caused by feedback, the advanced polaron-transformation scheme is no longer applicable if the measurement is not weak, which also makes meaningless the elegant effective measurement operator.%基于超导传输线和超导量子比特相互耦合的电路量子电动力学（quantumelectrodynamics，QED）系统，是研究固态量子信息和量子测量与控制的理想实验平台．本文在已有工作（单比特电路QED）基础上，进一步研究多比特电路QED系统．具体通过对两比特系统的量子测量和量子控制动力学的模拟，检验了“绝热消除”和“极化子变换”两
关于多比特电路量子动力学系统中光子自由度的消除方案研究
