Coherent charge oscillation in a semiconductor double quantum dot

Toshiaki Hayashi; Toshimasa Fujisawa; H. D. Cheong; Y. H. Jeong; Y. Hirayama

doi:10.1109/TNANO.2004.828551

Coherent charge oscillation in a semiconductor double quantum dot

Toshiaki Hayashi, Toshimasa Fujisawa, H. D. Cheong, Y. H. Jeong, Y. Hirayama

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The time evolution of a pulse-excited charge qubit in a semiconductor double quantum dot is investigated. All-electrical initialization and coherent gate control of the system are achieved, and coherent charge oscillation is observed through the transport measurements. The oscillation frequency and decoherence time T₂ are estimated by fitting the transport data with a simple model. Possible decoherence mechanisms in a charge qubit system are pointed out and discussed in detail.

Original language	English
Pages (from-to)	300-303
Number of pages	4
Journal	IEEE Transactions on Nanotechnology
Volume	3
Issue number	2
DOIs	https://doi.org/10.1109/TNANO.2004.828551
Publication status	Published - 2004 Jun
Externally published	Yes

Keywords

Charge qubit
Decoherence
Double quantum dot (QD)

ASJC Scopus subject areas

Computer Science Applications
Electrical and Electronic Engineering

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10.1109/TNANO.2004.828551

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abstract = "The time evolution of a pulse-excited charge qubit in a semiconductor double quantum dot is investigated. All-electrical initialization and coherent gate control of the system are achieved, and coherent charge oscillation is observed through the transport measurements. The oscillation frequency and decoherence time T2 are estimated by fitting the transport data with a simple model. Possible decoherence mechanisms in a charge qubit system are pointed out and discussed in detail.",

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AU - Fujisawa, Toshimasa

AU - Cheong, H. D.

AU - Jeong, Y. H.

AU - Hirayama, Y.

PY - 2004/6

Y1 - 2004/6

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AB - The time evolution of a pulse-excited charge qubit in a semiconductor double quantum dot is investigated. All-electrical initialization and coherent gate control of the system are achieved, and coherent charge oscillation is observed through the transport measurements. The oscillation frequency and decoherence time T2 are estimated by fitting the transport data with a simple model. Possible decoherence mechanisms in a charge qubit system are pointed out and discussed in detail.

KW - Charge qubit

KW - Decoherence

KW - Double quantum dot (QD)

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Coherent charge oscillation in a semiconductor double quantum dot

Abstract

Keywords

ASJC Scopus subject areas

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