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main page: GrassmannCosmoFun2009**These are just rough notes - feel free to correct them, add links, etc.** from the Grassmann ian Conference in Fundamental Cosmology (Grasscosmofun'09). These are **not** official proceedings. The speakers might even disagree that they said anything even vaguely related to what are in these online notes! Don't say you weren't warned.
# Tues 15 Sep 2009

main page: GrassmannCosmoFun2009

- KOWALSKI - some recent SNe Ia results
- John BARROW - varying alpha results:
- Chand, Srianand et al. 2004 results wrong because started from assuming alpha = constant (instead of free parameter) and then seeing if it can be varied; and because their best fit chi^2 is not a nice parabola and they missed fitting many lines; someone has reanalysed the data and got back to the varying alpha result;
- varying alpha for various absorption lines (Fe II(?), ...)
- results from 3 groups agree dalpha/alpha \approx -0.6 \times 10^{-5}
- varying alpha model BSBM - scalar field model - interpret Webb et al. results
- BSBM => violation of weak equivalence principle
- present bounds = 10^{-12} - probably need to go to space to get stronger constraints, e.g. 10^{-18}
- ... bouncing BSBM models....

- Pouria PEDRAM
- Wheeler de Witt equation

- Piotr DZIERZAK
- Bianchi I type model and LQC
- T^3 model !!!
- ... Big Bounce at classical level
- algebra of observables:
- aim: singularity aspects of the model in terms of observables

- E. MELAS
- canonical QQ for geometries admitting maximally symmetric 2D surfaces
- final expression for WDW eqn
- Conclusion:
- TODO:
- (1) render finite the 3 smooth functionals y^1, y^2, y^3
- (2) select an appropriate inner product

- requires only first derivatives, cf. Cartan-Karlhede which requires up to the 7th derivatives

- TODO:

- Mariusz DABROWSKI
- Big Rip, SFS (Sudden Future Singularity), TLB, radially inhomogeneous pressure models, possible solutions to DE with sudden singularity (in future(?))

- Przemyslaw MALKIEWICZ
- see papers with Piechocki - strings, membranes, in time-dependent orbifold

- Ghodsi HODA
- working with Martin Hendry
- q = fn(z), differs for SFS model vs standard concordance model
- with m=constant, SFS fails to fit all fashionable data sets simultaneously

- Boguslaw BRODA (Lodz)
- DE from quantum flucutations
- ... get rho approx rho_experimental where rho_experimental = rho_Lambda (?)
- other interesting approaches: holographic DE e.g. Ricci DE which is similar to Broda's approach
- Volovik approach - about 10 papers on arXiv.org

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Topic revision: r1 - 15 Sep 2009, BoudRoukema

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