1° Forum di Astronomia Amatoriale Italiano

Are YOU a Hologram? M-theory and the adS/CFT correspondence

The adS/CFT correspondence is a type of duality, which states that two apparently distinct physical theories are actually equivalent. On one side of this duality is the physics of gravity in a spacetime known as anti-de Sitter space (adS). Five-dimensional anti-de Sitter space has a boundary which is four-dimensional, and in a certain limit looks like flat spacetime with one time and three space directions. The adS/CFT correspondence states that the physics of gravity in five-dimensional anti-de Sitter space, is equivalent to a certain supersymmetric Yang-Mills theory which is defined on the boundary of adS. This Yang-Mills theory is thus a `hologram' of the physics which is happening in five dimensions. The Yang-Mills theory has gauge group SU(N), where N is very large, and it is said to be `supersymmetric' because it has a symmetry which allows you to exchange bosons and fermions. The hope is that this theory will eventually teach us something about QCD (quantum chromodynamics), which is a gauge theory with gauge group SU(3). QCD describes interactions between quarks. However, QCD has much less symmetry than the theory defined on the boundary of adS; for example, QCD has no supersymmetry. Furthermore, we still don't know how to incorporate a crucial property of QCD, known as asymptotic freedom.


Dalla Cambridge University.

Come è possibile?

The possible is all
Theory on five or six or eleven dimension is very open to moltipilcate answer and speculatons.

Ilùvatar next time try to translate please is more easy understand what you want know!
hi max

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note: nella vita sto imparando.

E' un forum italiano, siete pregati di scrivere nella nostra lingua, grazie.

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Tutto è relativo. Prendi un ultracentenario che rompe uno specchio: sarà ben lieto di sapere che ha ancora sette anni di disgrazie.
A. Einstein

Cieli Sereni
Vittorino Suma

C' ho messo un po d'ironia, proprio perché Ilùvatar ha scritto in straniero...me ne guarderei a scrivere in inglese anche perché il mio sarà pure scorretto.

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note: nella vita sto imparando.