Experimental nonlinear sign shift for linear optics quantum computation

被引：70
|
作者：
Sanaka, K
Jennewein, T
Pan, JW
Resch, K
Zeilinger, A
机构：
[1] Univ Vienna, Inst Expt Phys, A-1090 Vienna, Austria
[2] Austrian Acad Sci, Inst Quantenopt & Quanteninformat, A-1090 Vienna, Austria
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 01期
关键词：
D O I：
10.1103/PhysRevLett.92.017902
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have realized the nonlinear sign shift operation for photonic qubits. This operation shifts the phase of two photons reflected by a beam splitter using an extra single photon and measurement. We show that the conditional phase shift is (1.05+/-0.06)pi in clear agreement with theory. Our results show that, by using an ancilla photon and conditional detection, nonlinear optical effects can be implemented using only linear optical elements. This experiment represents an essential step for linear optical implementations of scalable quantum computation.
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页数：4
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