position operator


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position operator

[pə′zish·ən ‚äp·ə‚rād·ər]
(quantum mechanics)
The quantum-mechanical operator corresponding to the classical position variable of a particle.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Let [{[[partial derivative].sub.k], [[partial derivative].sup.*.sub.k]}.sub.k[greater than or equal to]0] be quantum Bernoulli noise, namely, annihilation and creation operators on H, and X be the position operator in [l.sup.2](Z, H).
Just as in the scalar case, the position operator X in [l.sup.2](Z, H) is defined by
The CS method implements initializing CS, determining fitness function, updating position operator, selecting operator, replacing operator, and eliminating operator in order to find the cuckoo individual with the best fitness.
EXAMPLE 1 (see [4, Corollary 1.35]) The standard operators in the context of uncertainty principles are the position operator A defined by Af(x) = xf(x) and the impulse operator B = -id/dx.
(14), [r.sub.i] is the position operator of the ith electron, measured relative to the nucleus, and the summation is over all electrons.
Google search is the tool that users utilise to find the product or service that they are looking for and Google can position operators with their search advertisement.
* The position operators had to maintain while trying to manually place the castings on the chuck put them at a higher than acceptable risk for injury.
Such well-planned and selective BSS-OSS integration programs will allow telecom operators to better address their particular customer needs and will free up funds to invest in their strategic priorities-and thus better position operators for growth.
* The manufacturer was concerned that the position operators had to maintain while trying to carefully place the castings on the chuck put them at a higher than acceptable risk for injury.

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