학술논문
QUANTUM DOT COMPUTING GATES.
Document Type
Article
Source
Subject
*QUANTUM dots
*SEMICONDUCTORS
*QUANTUM theory
*REQUESTS for proposals (Public contracts)
*LEPTONS (Nuclear physics)
*PARTICLES (Nuclear physics)
*NANOTECHNOLOGY
*SPINTRONICS
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Language
ISSN
0219-7499
Abstract
Semiconductor quantum dots are a promising candidate for future quantum computer devices. Presently, there are three major proposals for designing quantum computing gates based on quantum dot technology: (i) electrons trapped in microcavity; (ii) spintronics; (iii) biexcitons. We survey these designs and show mathematically how, in principle, they will generate 1-bit rotation gates as well as 2-bit entanglement and, thus, provide a class of universal quantum gates. Some physical attributes and issues related to their limitations, decoherence and measurement are also discussed. [ABSTRACT FROM AUTHOR]