Computing with spins: From classical to quantum computing release_6en4d46xyngijbpwb6bvxqr524

by S. Bandyopadhyay

Released as a article .

2004  

Abstract

This article traces a brief history of the use of single electron spins to compute. In classical computing schemes, a binary bit is represented by the spin polarization of a single electron confined in a quantum dot. If a weak magnetic field is present, the spin orientation becomes a binary variable which can encode logic 0 and logic 1. Coherent superposition of these two polarizations represent a qubit. By engineering the exchange interaction between closely spaced spins in neighboring quantum dots, it is possible to implement either classical or quantum logic gates.
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Date   2004-05-12
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