Temperature Effect on the Operation of Elementary Quantum-Dot Spin Gates by the Example of the NOT-AND Gate

1998/10/26 by A. V. Krasheninnikov, R. A. Koltsov
Physics and Astronomy · #cond-mat.str-el

paper · pdf

published as Phys.Low-Dim.Struct. 9/10 180 (1998) · 5 eps figures

arxiv created 1998/10/26 · arxiv updated 2009/11/30

Abstract

The effect of temperature on the operation of the elementary quantum-dot spin gates for single-electron computing is studied theoretically within the framework of the Hubbard model by the example of the NOT-AND gate. The calculated values of the uniform external magnetic field necessary to realize the whole truth table proved to be unreasonably high for the implementation of the NOT-AND logical function even at the liquid helium temperature. This result appears to be common to all spin gates. Thus, finite temperatures seem to be a serious obstacle for the practical realization of ground state calculations in quantum dot spin gates.

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