Volume 52, Number 2, October II 2000
|Page(s)||196 - 202|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 September 2002|
Possible construction of a quantum multiplexer
Department of Mathematics, Auckland University
Auckland private bag 92019, New Zealand
2 Department of Higher Mathematics, Leningrad Institute of Fine Mechanics and Optics 14, Sablinskaya, St.-Petersburg, 197101, Russia
3 Department of Mathematics, Mordovian State University 68, Bolshevistskaya, Saransk, 430000, Russia
Accepted: 25 August 2000
The problem of constructing a quantum multiplexer is discussed. A possible construction based on the properties of quantum waveguides connected with a quantum resonator is considered. A descriptive model of ballistic transport in 1D-2D-1D system is suggested. It is analogous to the zero-range potential method and based on the theory of self-adjoint extensions of symmetric operators. A general formula for transmission coefficient for the system, particularly in the case of presence of a magnetic field, is obtained. A concrete realization of the formula for the quantum system in question is developed and analyzed. Quantum resonators with two and four leads are studied. A possible application of the result for constructing a quantum multiplexer is discussed. Control parameters for the device are electron energy (“momentum filter") or bias voltage related with the radius of the quantum resonator (“multiplexer"). If there is a magnetic field then a value of a magnetic field B is an additional control parameter.
PACS: 72.10.-d – Theory of electronic transport; scattering mechanisms / 02.30.Jr – Partial differential equations
© EDP Sciences, 2000
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