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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Il Nuovo Cimento Aarrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Il Nuovo Cimento A
Article . 1975 . Peer-reviewed
License: Springer TDM
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The four-dimensional position operator, coherent states and representations of the conformal group

Authors: Z. Haba;

The four-dimensional position operator, coherent states and representations of the conformal group

Abstract

It is shown that the representation space of the conformal groupSO4,2 is the Bargmann-Segal space of coherent states |wμ› of the non-Hermitian position operator\(\bar w_\mu ^ + \). The states |wμ› are coherent in the usual sense of minimal uncertainty ofxμ andpμ. The real part of\(\bar w_\mu ^ + \) gives the Hermitian position operatorxμ. Both operators fulfil the canonical commutation relations and are covariant under the conformal group. The imaginary part of\(\bar w_\mu ^ + \) describes the dispersion of position. The metric operatorG connecting\(\bar w_\mu \) with its adjoint\(\bar w_\mu ^ + \) gives the scalar product for various representations of the conformal group.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
3
Average
Average
Average
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