a computer that makes use of the quantum states of electrons or other particles to store and process information as quantum bits.
a type of computer which uses the ability of quantum systems to be in many different states at once, thus allowing it to perform many different computations simultaneously
A computer that exploits the quantum mechanical properties of superposition in order to allow a single operation to act on a large number of pieces of data. In a quantum computer, the data to be manipulated, represented in quantum bits, exists in all possible states simultaneously, in superposition. This allows a single operation to operate over all of these states at once, in contrast with a classical computer, which must carry out an operation for each state separately. Because of the difficulty of creating environments small enough for quantum effects to emerge but sufficiently isolated to prevent interaction with outside influences such as heat, only extremely rudimentary quantum computers currently exist, though algorithms for possible future devices are being developed.
- Quantum cryptography
noun 1. a method of coding information based on quantum mechanics, which is said to be unbreakable
- Quantum dot
physics (Or “single-electron transistor”) A location capable of containing a single electrical charge; i.e., a single electron of Coulomb charge. Physically, quantum dots are nanometer-size semiconductor structures in which the presence or absence of a quantum electron can be used to store information. See also: quantum cell, quantum cell wire, quantum-dot cellular automata. (http://www-mtl.mit.edu/MTL/bulletin/v6n2/Kumar.html). [“Quantum […]
- Quantum-dot cellular automata
electronics, computing (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 […]
- 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