Quantum oscillations of the persistent current in a normal loop

Giorgi  GL; de Pasquale  F

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Quantum oscillations of the persistent current in a normal loop

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摘要

A quantum two-level system based on the superposition of current states circulating in either the clockwise or counterclockwise direction is proposed. A one-dimensional ring with inhomogeneity in the on-site energies is shown to be suitable to exhibit such an effect. Quantum oscillations between two states can be observed by initialization of the system through a trapped magnetic field. We consider decoherence effects due to electron-phonon interaction and discuss possible effects derived from disorder. Finally, a possible application to carbon nanotubes is discussed.

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《Physical review, B. Condensed matter and materials physics》 |2007年第6期|4501-1-4501-6-0|共6页
作者
Giorgi GL; de Pasquale F;
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作者单位

Univ Roma La Sapienza, CNR, INFM, Ctr Stat Mech & Complex,Dipartimento Fis, I-00185 Rome, Italy;

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原文格式 PDF
正文语种英语
中图分类固体物理学;
关键词
JOSEPHSON-JUNCTION; CARBON NANOTUBES; STATES; RINGS; SUPERPOSITION; LOCALIZATION; SYSTEM;

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Quantum oscillations of the persistent current in a normal loop

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