Table of Contents
VLSI Design
Volume 13, Issue 1-4, Pages 97-102

Numerical Simulation of Quantum Logic Gates Based on Quantum Wires

1lstituto Nazionale per la Fisica della Materia, Dipartimento di Fisica, Università di Modena e Reggio Emilia, Via Campi 213/A, Modena 41100, Italy
2DEIS, Università di Bologna, Viale Risorgimento 2, Bologna, Italy

Copyright © 2001 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A system based on frontier mesoscopic semiconductor technology, able to perform the basic quantum operations needed for quantum computation, is proposed. The elementary quantum bit (qubit) is defined as the state of an electron running along a couple of quantum wires coupled through a potential barrier with variable height and/ or width. A proper design of the system, together with the action of Coulomb interaction of two electrons representing two different qubits, allows the implementation of basic one-qubit and two-qubit quantum logic gates. Numerical simulations confirm the correctness of the hypothesis.