Virtual Transitions

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 It might be outdated or ideologically biased.

Virtual Transitions

 

in quantum theory, transitions of a physical microsystem from one state to another; they are associated with the formation or annihilation of virtual particles—that is, particles that exist only in intermediate states (virtual states), which have a short lifetime.

G. IA. MIAKISHEV

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The only difference between an [S.sup.*]PR net and its constructed net is the virtual transitions and virtual places that are inserted by Algorithm 2.
By the Step 2.1 of Algorithm 2, pairs of virtual transitions and places should be inserted at the rear of each branch of choice places; in other words, {T[V.sub.1], [P.sub.1][R.sub.1][V.sub.1]}, {T[V.sub.2][P.sub.1][R.sub.1] [V.sub.2]}, {T[V.sub.3], [P.sub.1][R.sub.2][V.sub.1]}, {T[V.sub.4], [P.sub.1][R.sub.2][V.sub.2]}, {T[V.sub.5], [P.sub.2][R.sub.2][V.sub.1]}, and {T[V.sub.6], [P.sub.2][R.sub.2][V.sub.2]} are inserted.
For all p [member of] P, t [member of] [p.sup.*], a pair of virtual place and virtual transition {[p.sub.v], [t.sub.v]} is inserted into (p, t) as follows:
Full browser ?