Coherent control of a flux qubit by phase-shifted resonant microwave pulses

被引：27

作者：

Kutsuzawa, T

Tanaka, H

Saito, S

Nakano, H

Semba, K ^{[1
]}

Takayanagi, H

机构：

[1] NTT Corp, NTT Basic Res Labs, Kanagawa 2430198, Japan

[2] Japan Sci & Technol Agcy, CREST, Saitama 3320012, Japan

[3] Sci Univ Tokyo, Dept Phys, Tokyo 1628601, Japan

来源：

APPLIED PHYSICS LETTERS | 2005年 / 87卷 / 07期

关键词：

D O I：

10.1063/1.2010610

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The quantum state of a flux qubit was successfully pulse controlled by using a resonant microwave. We observed Ramsey fringes by applying a pair of phase-shifted pi/2 microwave pulses without introducing detuning. With this method, the qubit state can be rotated on an arbitrary axis in the x-y plane of the Bloch sphere in a rotating frame. We successfully observed qubit Larmor precession stroboscopically with an angular velocity of 2 pi x11.4G rad/s. In combination with Rabi pulses, this method enables us to achieve full control of single qubit rotation with shorter operation time. (C) 2005 American Institute of Physics.

引用

页数：3

共 20 条

[1] Coherent dynamics of a flux qubit coupled to a harmonic oscillator [J].