Macroscopically distinct quantum-superposition states as a bosonic code for amplitude damping

被引:343
|
作者
Cochrane, PT [1 ]
Milburn, GJ [1 ]
Munro, WJ [1 ]
机构
[1] Univ Queensland, Dept Phys, St Lucia, Qld 4072, Australia
来源
PHYSICAL REVIEW A | 1999年 / 59卷 / 04期
关键词
D O I
10.1103/PhysRevA.59.2631
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We show how macroscopically distinct quantum superposition states (Schrodinger cat states) may be used as logical qubit encodings for the correction of spontaneous emission errors. Spontaneous emission causes a bit flip error, which is easily corrected by a standard error correction circuit. The method works arbitrarily well as the distance between the amplitudes of the superposed coherent states increases. [S1050-2947(99)06503-8].
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页码:2631 / 2634
页数:4
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