quantum


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quantum

 [kwon´tum] (L.)
an elemental unit of energy; the amount emitted or absorbed at each step when energy is emitted or absorbed by atoms or molecules.

quan·tum

, pl.

quan·ta

(kwahn'tŭm, -tă),
1. A unit of radiant energy (Q) varying according to the frequency (ν) of the radiation.
2. A certain definite amount.
[L. how much]

quan·tum

, pl. quanta (kwahn'tŭm, -tǎ)
1. A unit of radiant energy (ε) varying according to the frequency (ν) of the radiation.
2. A certain definite amount.
[L. how much]

quantum

  1. a quantity or amount.
  2. the minimum quantity in which a neurotransmitter is secreted.
  3. a unit of light.

photon 

The basic unit of radiant energy defined by the equation
E = hν
where h is Planck's constant (6.62 ✕ 10−34 joule ✕ second), ν the frequency of the light and E the energy difference carried away by the emission of a single photon of light. The term photon usually refers to visible light whereas the term quantum refers to other electromagnetic radiations. See quantum theory; wave theory; troland.

quan·tum

, pl. quanta (kwahn'tŭm, -tǎ)
Unit of radiant energy (Q) varying by frequency (ν) of radiation.
[L. how much]
References in periodicals archive ?
As the first commercial QKD solution in the U.S., Quantum Xchange exclusively owns the distance enhancing Trusted Node technology developed by Battelle which can extend the QKD range indefinitely using 100-mile multiples, making large-scale QKD over long distances possible and practical.
Bennett and others realized that some kinds of computations that are exponentially time consuming, or even impossible, could be efficiently performed with the help of quantum phenomena.
'A key period for the development of quantum computing is coming, like bamboo shoots popping out after the rain,' Pan said.
"The Quantum board is excited by the prospects of the enlarged group and Quantum's role in it."
The IBM Quantum Experience enables anyone to connect to IBM's quantum processor via the IBM Cloud, to run algorithms and experiments, work with the individual quantum bits, and explore tutorials and simulations around what might be possible with quantum computing.
The QUESS satellite will also test the possibilities of communication via quantum 'teleportation,' using an entangled pair of photons.
The development of quantum computers capable of performing operations many orders of magnitude faster than conventional computers has been a goal of computer scientists and physicists ever since the idea was first floated in the early 1980s.
The emergence of Chinese UHD TV manufacturers such as Hisense, Tongfang, TCL, and Haier has propelled the production of quantum dot-based UHD TVs, resulting in an increased demand for quantum dots in the APAC region.
Gribbin describes the present-day difficulties of building quantum computers that are large enough to compete with conventional computers at most tasks, as well as possible solutions.
The applications for high-data-rate long-haul quantum networks are only just beginning to be thought through.