利用超导磁通量子比特对单电子自旋进行单点读出（英文）  

Single-shot readout of a single electron spin with superconductingflux qubit

作　　者：朱进贤[1] 

机构地区：[1]中国科学技术大学近代物理系,安徽合肥230026

出　　处：《中国科学技术大学学报》2014年第6期468-473,共6页JUSTC

基　　金：Supported by the National Key Basic Research(973)Program of China(2007CB925200)

摘　　要：提出了一种基于量子非破坏性测量协议利用超导磁通量子比特对单电子自旋进行单点读出的方案.在该协议中,超导磁通量子比特与电子自旋相互作用一段时间,然后通过对其测量来间接得到电子的信息.由于该测量对电子自旋的态是非破坏性的,因此可以利用该超导磁通量子比特对电子自旋进行反复的读出,从而达到一个较高的读出精度.A quantum non-demolition measurement protocol was proposed for single-shot readoutof the eigenstate of a single electron spin utilizing a superconducting flux qubit. In this protocol, the flux qubit is used to interact with the electron spin for some time, and then measured for extracting the information of the state of the electron spin. Due to the non-demolition of the measurements, the state of the electron spin can be measured repeatedly many times for achieving a high precision.

关 键 词：量子信息 量子非破坏性测量 电子自旋 超导磁通量子比特 

分 类 号：O413.2[理学—理论物理]