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Possibly even right Noncommutative Geometry and the real world.

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Presentation on theme: "Possibly even right Noncommutative Geometry and the real world."— Presentation transcript:

1 Possibly even right Noncommutative Geometry and the real world

2 According to some strings are not even wrong They are at best a mathematical theory without any possibly verifiable connection with the real world Are we like them or can we be wrong? Can we be right? What do I mean by Noncommutative Geometry?

3 Where do we come from? Quantum Mechanics (Heisenberg, Dirac, Von Neumann Moyal) Mathematics (Gel’fand, Connes) Strings (Frohlich, Seiberg, Witten) Quantum Field Theory- Structure of space time at Planck lenght (Doplicher, Fredhenagen, Wess….)

4 Where can we go? Mathematics There have been lots of successes in mathematics This is a noble activity, and apart that it may create problems with funding agencies I see nothing wrong in doing it Or we may do physics

5 Connes’ standard model It is nor really noncommutative, the structure of spacetime is unchanged It makes predictions testable at LHC

6 Κ-Minkowski It is an Hopf Algebra with a rich structure It has non trivial dispersion relations They could help explain some astronomical observations of γ ray burst The dispersion relations depend on the basis!

7 Moyal Plane Consider θ as a background tensor Most of the effects are a consequance of Lorentz non invariance Accelerator experiments (Trampetic, Ohl) Cosmology. Inflation makes a huge amplification of short distance effects (up to 10^13 GeV at Planck)

8 Θ-Poincaré We still have a (deformed) Lorentz Invariance We can study deformations of Gravity (al et Wess) Spin Statistics

9 Are we mature enough to make predictions?


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