Quantum Hall bilayer digital amplifier |
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| Authors: | R Khomeriki J Léon D Chevriaux |
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| Institution: | (1) Physics Department, Tbilisi State University, 0128 Tbilisi,, Università di Firenze, 50139 Firenze, Italy;(2) Laboratoire de Physique Théorique et Astroparticules, CNRS-UMR5207, Université Montpellier 2, 34095 Montpellier, France |
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| Abstract: | A quantum Hall double layer system at total Landau level filling
factor ν=1, seeded by a modulated ac-voltage input signal of frequency
inside the forbidden band gap, is demonstrated to work as a digital amplifier
of ultra weak signals. The theory employs to the sine-Gordon model and it is
confirmed by the first experimental observations of nonlinear bistable
transmission in a pendula chain. |
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