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.
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页数：3
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