Crossover from 'mesoscopic' to 'universal' phase for electron transmission in quantum dots

Article Abstract:

The results of phase measurements on a series of small quantum dots, having occupancies of between only 1-20 electrons, where the phase behavior for electron transmission is easier in principle to interpret are reported. Clear mesoscopic features in the phase measurements are observed when the dot occupancy is less than approximately 10 electrons and as the occupancy increases, the manner of phase evolution changes and universal behavior is recovered from some 14 electrons.

United States, Usage, Electron transport, Mesoscopic systems

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Direct observation of a fractional charge

Article Abstract:

Research using quantum shot noise shows that the fractional quantum Hall (FQH) effect is counterintuitive. Experiments demonstrate that current in a two-dimensional electron gas in the FQH regime carry fractional charges matching theoretical analysis. Noise analysis identifies a current with a filling factor of 1/3 which carries quasiparticles with a charge e/3.

Energy levels (Quantum mechanics)

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The microscopic nature of localization in the quantum Hall effect

Article Abstract:

The reason for the quantum Hall effect is discussed. Also, their implications are discussed in detail.

Quantum electronics, Quantum Hall effect

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