Fast entanglement of two charge-phase qubits through nonadiabatic coupling to a large Josephson junction

被引：26

作者：

Wang, YD ^{[1
]}

Zhang, P ^{[1
]}

Zhou, DL ^{[1
]}

Sun, CP ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW B | 2004年 / 70卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.70.224515

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We propose a theoretical protocol for quantum logic gates between two Josephson junction charge-phase qubits through the control of their coupling to a large junction whose Josephson coupling energy is much larger than its Coulomb charge energy. In the low excitation limit of the large junction, it behaves effectively as a quantum data-bus mode of a harmonic oscillator. Our protocol can be fast since it does not require the data-bus to stay adiabatically in its ground state, as such it can be implemented over a wide parameter regime independent of the data-bus quantum state.

引用

页码：224515 / 1

页数：4

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