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Quantum fluctuations of Coulomb potential as a source of Flicker noise: The influence of a heat bathстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Автор: Kazakov K.A.
- Журнал: Journal of Physics A: Mathematical and Theoretical
- Том: 40
- Год издания: 2007
- Издательство: IOP Publishing
- Местоположение издательства: [Bristol, UK], England
- Первая страница: 5277
- Последняя страница: 5296
- DOI: 10.1088/1751-8113/40/20/004
- Аннотация: The power spectrum of finite-temperature quantum electromagnetic fluctuations produced by elementary charge carriers under the influence of external electric field is investigated. It is found that under the combined action of the photon heat bath and the external field, the lower-frequency asymptotic of the power spectrum is modified both qualitatively and quantitatively. The new term in the power spectrum is inversely proportional to frequency, but is odd with respect to it. It comes from the connected part of the correlation function, and is related to the temperature and external field corrections to the photon and charge carrier propagators. In application to the case of a biased conducting sample, this term gives rise to a contribution to the voltage power spectrum which is proportional to the absolute system temperature, the charge carrier mobility, the bias voltage squared, and a factor describing dependence of the noise intensity on the sample geometry. It is verified that the derived expression is in agreement with the experimental data on 1/f -noise measurements inmetal films. It is shown also that the obtained result provides a natural resolution to the problem of divergence of the total noise power.
- Добавил в систему: Казаков Кирилл Александрович