(QCA) Quantum logic circuits created by orientating pairs of quantum cells so that their relative positions determine their affect on each other. This is functionally analogous but structurally different from how individual gates in integrated circuits are combined to create logical and memory circuitry.
The advantages of quantum-dot cellular automata over conventional circuitry are extremely small size/high density, low power requirements, and potentially high processing speeds. Disadvantages (in 2000) are difficulty of fabrication and low yield.
See also: quantum cell wire.
[“Quantum Dot Heterostructures”, D. Bimberg, et al, John Wiley & Sons Ltd., Dec 1998].
- Quantum efficiency
noun 1. (physics) the number of electrons released by a photocell per photon of incident radiation of a given energy 2. (chem) the number of chemical species that undergo reaction per photon of absorbed radiation of a given energy
noun, Physics. 1. the quantum field theory that deals with the electromagnetic field and its interaction with electrons and positrons. Abbreviation: QED. noun 1. (physics) a relativistic quantum mechanical theory concerned with electromagnetic interactions QED quantum electrodynamics A quantum field theory of electromagnetism that explains the interactions between electrically charged particles and photons. According to […]
- Quantum electronics
noun 1. the application of quantum mechanics and quantum optics to the study and design of electronic devices
noun, Physics. 1. any theory in which fields are treated by the methods of quantum mechanics; each field can then be regarded as consisting of particles of a particular kind, which may be created and annihilated. noun 1. (physics) quantum mechanical theory concerned with elementary particles, which are represented by fields whose normal modes of […]