Pure State


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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Pure State

 

A pure state of a quantum-mechanical system is a state that is characterized by specifying the complete set of possible values of the dynamic variables that define the state of the system. A pure state is described by the wave function of the dynamic variables and is a basic concept of quantum mechanics. A superposition of wave functions—that is, the sum of such functions with arbitrary complex coefficients—also describes a pure state of a system. A pure state is often simply called a quantum state, although there is a more general case, namely the mixed state, in quantum mechanics. (SeeMIXED STATE.)

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in classic literature ?
And leaning over the air apparatus, he saw that the tap was allowing the colorless gas to escape freely, life-giving, but in its pure state producing the gravest disorders in the system.
When the wine came, too, I thought it flat; and it certainly had more English crumbs in it, than were to be expected in a foreign wine in anything like a pure state, but I was bashful enough to drink it, and say nothing.
Some phytochemicals are not metabolized in their pure state - nor do they necessarily work by themselves.
(17.)Mohanty argues that the perception of the other as a pure state frees the ex-colonial from adequately relating to his former subjects (19).
The central image presents life as a journey from that pure state of childhood into sensuality and sin.
State of Michigan agreed with a lower court's ruling that the state liquor commission's action was "pure state action" and therefore immune from federal anti-trust regulation.
In its pure state it does not push; it pulls by sheer moral or spiritual authority-- by simple presence.
We also assume that initially, prior to any interaction, the environment is in a pure state |[OMEGA]> [member of] [H.sub.E].
Because the mystery of existence, material waiting to become flesh, is presented by Piva in its pure state, colour, form, light and that is life," said Gianni Piva about his work.
There's a clear sense of the primaries (and white) at the basis of their coloristic tropisms, but these rarely appear in their pure state, always shifting, interfusing, and refracting; likewise there is always the sense that the paintings have an underlying architectural structure, though one that remains elusive.
In his study of the Kuna Indians, who live on islands off the coast of Panama, he found that, in its pure state, cocoa helped increase blood flow in the brain and the extremities.