Tuning the Gap of a Superconducting Flux Qubit

被引：158

作者：

Paauw, F. G. ^{[1
]}

Fedorov, A. ^{[1
]}

Harmans, C. J. P. M. ^{[1
]}

Mooij, J. E. ^{[1
]}

机构：

[1] Delft Univ Technol, Kavli Inst Nanosci, NL-2600 GA Delft, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 102卷 / 09期

关键词：

PERSISTENT-CURRENT QUBIT; QUANTUM DYNAMICS; CIRCUIT; STATE; CAVITY; BITS;

D O I：

10.1103/PhysRevLett.102.090501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We experimentally demonstrate the in situ tunability of the minimum energy splitting (gap) of a superconducting flux qubit by means of an additional flux loop. Pulses applied via a local control line allow us to tune the gap over a range of several GHz on a nanosecond time scale. The strong flux sensitivity of the gap (up to similar to 0.7 GHz/m Phi(0)) opens up the possibility to create different types of tunable couplings that are effective at the degeneracy point of the qubit. We investigate the dependence of the relaxation time and the Rabi frequency on the qubit gap.

引用

页数：4

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