Cavity-Mediated Entanglement Generation Via Landau-Zener Interferometry

被引：45

作者：

Quintana, C. M. ^{[1
]}

Petersson, K. D. ^{[1
]}

McFaul, L. W. ^{[1
]}

Srinivasan, S. J. ^{[2
]}

Houck, A. A. ^{[2
]}

Petta, J. R. ^{[1
,3
]}

机构：

[1] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[2] Princeton Univ, Dept Elect Engn, Princeton, NJ 08544 USA

[3] Princeton Univ, Princeton Inst Sci & Technol Mat PRISM, Princeton, NJ 08544 USA

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 17期

基金：

美国国家科学基金会;

关键词：

STATE; QUBITS;

D O I：

10.1103/PhysRevLett.110.173603

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate quantum control and entanglement generation using a Landau-Zener beam splitter formed by coupling two transmon qubits to a superconducting cavity. Single passage through the cavity-mediated qubit-qubit avoided crossing provides a direct test of the Landau-Zener transition formula. Consecutive sweeps result in Landau-Zener-Stuckelberg interference patterns, with a visibility that can be sensitively tuned by adjusting the level velocity through both the nonadiabatic and adiabatic regimes. Two-qubit state tomography indicates that a Bell state can be generated via a single passage, with a fidelity of 78% limited by qubit relaxation. DOI: 10.1103/PhysRevLett.110.173603

引用

页数：5

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