Quantum computing and quantum measurement with mesoscopic Josephson junctions

被引:0
|
作者
Averin, DV [1 ]
机构
[1] SUNY Stony Brook, Dept Phys & Astron, Stony Brook, NY 11794 USA
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关键词
D O I
10.1002/1521-3978(200009)48:9/11<1055::AID-PROP1055>3.0.CO;2-1
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Recent experimental demonstrations of quantum coherence of the charge and flux states of Josephson junctions show that the quantum Josephson dynamics can be used to develop scalable quantum logic circuits. In this work, I review the basic concepts of Josephson tunneling and Josephson-junction qubits, and discuss two problems of this tunneling motivated by quantum computing applications. One is the theory of photon-assisted resonant flux tunneling in SQUID systems used to demonstrate quantum coherence of flux. Another is the problem of quantum measurement of charge with the SET electrometer. It is shown that the SET electrometer at the Coulomb blockade threshold is the quantum-limited detector with energy sensitivity reaching (h) over bar/root3 in the resonant-tunneling regime.
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页码:1055 / 1074
页数:20
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