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题名: Operation of the qubit based on photon-assisted tunneling in a coupled quantum-dot system and the influence of dephasing
作者: Jiang ZT;  Peng J;  You JQ;  Zheng HZ
发表日期: 2002
摘要: We derive the generalized rate equation for the coupled quantum-dot (QD) system irradiated by a microwave field in the presence of a quantum point contact. It is shown that when a microwave field is tuned in resonance with the energy difference between the ground states of two QD's, the photon-assisted tunneling occurs and, as a result, the coupled QD system may be used as the single qubit. Furthermore, we show that the oscillating current through the detector decays drastically as the dephasing rate increases, indicating clearly the influence of the dephasing effect induced by the quantum point contact used as a detecting device.
KOS主题词: Transportation;  Electron paramagnetic resonance spectroscopy;  alpha-particle spectra;  Optical spectrometers;  Spectrum analysis;  detector;  States;  Cantons
刊名: PHYSICAL REVIEW B
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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推荐引用方式:
Jiang ZT; Peng J; You JQ; Zheng HZ .Operation of the qubit based on photon-assisted tunneling in a coupled quantum-dot system and the influence of dephasing ,PHYSICAL REVIEW B,2002,65 (15):Art.No.153308
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