Realization of an n-qubit controlled-U gate with superconducting quantum interference devices or atoms in cavity QED

被引：88

作者：

Yang, CP ^{[1
]}

Han, SY ^{[1
]}

机构：

[1] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA

来源：

PHYSICAL REVIEW A | 2006年 / 73卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevA.73.032317

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We propose an approach to realize an n-qubit controlled-U gate with superconducting quantum interference devices (SQUIDs) in cavity QED. In this approach, the two lowest levels of a SQUID represent the two logical states of a qubit while a higher-energy intermediate level serves the gate manipulation. Our method operates essentially by creating a single photon through one of the control SQUIDs and then performing an arbitrary unitary transformation on the target SQUID with the assistance of the cavity photon. In addition, we show that the method can be applied to implement an n-qubit controlled-U gate with atomic qubits in cavity QED.

引用

页数：11

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