Diabatic Gates for Frequency-Tunable Superconducting Qubits

被引：95

作者：

Barends, R. ^{[1
]}

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

Petukhov, A. G. ^{[2
]}

Chen, Yu ^{[1
]}

Kafri, D. ^{[2
]}

Kechedzhi, K. ^{[2
]}

Collins, R. ^{[1
]}

Naaman, O. ^{[1
]}

Boixo, S. ^{[2
]}

Arute, F. ^{[1
]}

Arya, K. ^{[1
]}

Buell, D. ^{[1
]}

Burkett, B. ^{[1
]}

Chen, Z. ^{[1
]}

Chiaro, B. ^{[3
]}

Dunsworth, A. ^{[1
]}

Foxen, B. ^{[3
]}

Fowler, A. ^{[1
]}

Gidney, C. ^{[1
]}

Giustina, M. ^{[1
]}

Graff, R. ^{[1
]}

Huang, T. ^{[1
]}

Jeffrey, E. ^{[1
]}

Kelly, J. ^{[1
]}

Klimov, P. V. ^{[1
]}

Kostritsa, F. ^{[1
]}

Landhuis, D. ^{[1
]}

Lucero, E. ^{[1
]}

McEwen, M. ^{[3
]}

Megrant, A. ^{[1
]}

Mi, X. ^{[1
]}

Mutus, J. ^{[1
]}

Neeley, M. ^{[1
]}

Neill, C. ^{[1
]}

Ostby, E. ^{[2
]}

Roushan, P. ^{[1
]}

Sank, D. ^{[1
]}

Satzinger, K. J. ^{[1
]}

Vainsencher, A. ^{[1
]}

White, T. ^{[1
]}

Yao, J. ^{[1
]}

Yeh, P. ^{[1
]}

Zalcman, A. ^{[1
]}

Neven, H. ^{[2
]}

Smelyanskiy, V. N. ^{[2
]}

Martinis, John M. ^{[1
,3
]}

机构：

[1] Google, Santa Barbara, CA 93117 USA

[2] Google, Venice, CA 90291 USA

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

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 21期

关键词：

QUANTUM SUPREMACY;

D O I：

10.1103/PhysRevLett.123.210501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We demonstrate diabatic two-qubit gates with Pauli error rates down to 4.3(2) x 10(-3) in as fast as 18 ns using frequency-tunable superconducting qubits. This is achieved by synchronizing the entangling parameters with minima in the leakage channel. The synchronization shows a landscape in gate parameter space that agrees with model predictions and facilitates robust tune-up. We test both iswAP-like and CPHASE gates with cross-entropy benchmarking. The presented approach can be extended to multibody operations as well.

引用

页数：6

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