Fast Tunable Coupler for Superconducting Qubits

被引：99

作者：

Bialczak, R. C. ^{[1
]}

Ansmann, M. ^{[1
]}

Hofheinz, M. ^{[1
]}

Lenander, M. ^{[1
]}

Lucero, E. ^{[1
]}

Neeley, M. ^{[1
]}

O'Connell, A. D. ^{[1
]}

Sank, D. ^{[1
]}

Wang, H. ^{[1
]}

Weides, M. ^{[1
]}

Wenner, J. ^{[1
]}

Yamamoto, T. ^{[2
]}

Cleland, A. N. ^{[1
]}

Martinis, J. M. ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

[2] NEC Corp Ltd, Green Innovat Res Labs, Tsukuba, Ibaraki 3058501, Japan

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.106.060501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A major challenge in the field of quantum computing is the construction of scalable qubit coupling architectures. Here, we demonstrate a novel tunable coupling circuit that allows superconducting qubits to be coupled over long distances. We show that the interqubit coupling strength can be arbitrarily tuned over nanosecond time scales within a sequence that mimics actual use in an algorithm. The coupler has a measured on/off ratio of 1000. The design is self-contained and physically separate from the qubits, allowing the coupler to be used as a module to connect a variety of elements such as qubits, resonators, amplifiers, and readout circuitry over distances much larger than nearest-neighbor. Such design flexibility is likely to be useful for a scalable quantum computer.

引用

页数：4

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