Computing with spins: From classical to quantum computing

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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References in corpus (2)

• Spin-based all-optical quantum computation with quantum dots: understanding and suppressing decoherence
• Can spintronic field effect transistors compete with their electronic counterparts?

Cited by in corpus (6)

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• An Energy-Efficient Bennett Clocking Scheme for 4-State Multiferroic Logic
• Navigating the phase diagram of quantum many-body systems in phase space