This quarter the poll is focused on four dark horse longshots.(adsbygoogle = window.adsbygoogle || []).push({});

AASTRUP GRIMSTRUP

(Missed them when they came out, but better late than never.) They have found a way to construct the Connes' Standard Model of particle physics, onthe LQG configuration space of all geometriesof a given spacetime continuum, instead of on a 4D smooth manifold. Their idea is to put Connes' NCG together with LQG.

BOJOWALD

His *Nature Physics* article says that in his model there was a bounce and certain features of the Before quantum state cannot be determined from knowledge of the After quantum state. He has identified an area offundamental uncertaintyabout what happened before the big bang. Is he right?

BONANNO REUTER

They get the usual amount of inflation, but without assuming exotic matter, plus their inflation comes to a graceful stop without a contrived "slow roll" potential, and reheating is automatic. In other words, they get natural inflation without needing an "inflaTON" or any other extras. Their model simply renormalizes Einstein's gravity---that done, the rest comes free. They also get the correct entropy of the Microwave Background. Are they right?

FREIDEL KRASNOV

They propose a new dynamics for the LQG spinfoam. If it is the right one, this culminates a search that has lasted some 10 years. There are rival candidates.

Here are the links

Aastrup and Grimstrup

Intersecting Connes Noncommutative Geometry with Quantum Gravity

http://arxiv.org/abs/hep-th/0601127

Bojowald

What happened before the big bang?

http://npg.nature.com/nphys/journal/v3/n8/full/nphys654.html [Broken]

(abstract page with citation count: http://adsabs.harvard.edu/abs/2007NatPh...3..523B )

Bonanno and Reuter

Entropy signature of the running cosmological constant

http://arxiv.org/abs/0706.0174

Freidel and Krasnov

A New Spin Foam Model for 4d Gravity

http://arxiv.org/abs/0708.1595

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some past M.I.P. polls

https://www.physicsforums.com/showthread.php?t=116791

https://www.physicsforums.com/showthread.php?t=124951

https://www.physicsforums.com/showthread.php?t=134513

https://www.physicsforums.com/showthread.php?t=149466

https://www.physicsforums.com/showthread.php?t=162163

https://www.physicsforums.com/showthread.php?t=174427

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# Most Influential Paper, third quarter 2007

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