Quantum computing with superconductors

被引:28
作者
Berggren, KK
机构
[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA
[2] MIT, Lincoln Lab, Lexington, MA 02420 USA
关键词
Josephson junction qubit; macroscopic quantum coherence; quantum computing; superconductive qubit;
D O I
10.1109/JPROC.2004.833672
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Superconductive technology is one of the most promising approaches to quantum computing because it offers devices with little dissipation, ultrasensitive magnetometers, and electrometers for state readout, large-scale-integration, and a family of classical electronics that could be used for quantum bit (qubit) control. The challenges this technology faces, however are substantial: for example, control of the qubit to a part in similar to10(4) must be accomplished with analog control pulses. But even after this is done, the accuracy is limited by the unavoidable decay of quantum information in the system. Recent experiments suggest the time over which this decay occurs is <1 mus, though it is expected to lengthen as experimental methods improve. A 1-mus decay time would mandate a very difficult to achieve maximum time of similar to100 ps per analog operation. Thus, quantum computing is, simultaneously a promising technology for solving certain very hard problems in computer science and a daunting challenge for those working to develop that technology.
引用
收藏
页码:1630 / 1638
页数:9
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