#### marcus

Science Advisor

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**Loop Quantum Gravity trying to explain Lambda**

Vast, you raised the issue of the cosmological constant

(the assumed constant energy density used to make the model have accelerating expansion so it will fit the data)

The next related conference talk I know of about that is early next month in a Feb 4-14 special seminar where Lee Smolin is supposed to give a talk on

"Cosmological Constant and Quantum Gravity"

here is the webpage that lists the talks:

http://www.ws2004.ift.uni.wroc.pl/html.html [Broken]

You can say it is the current LQG bid in the "Lambda Sweepstakes"

Quantum gravity is the quantum theory of what space consists of, at very small scale, and it seems to me that it is exactly the branch of physical theory you would want to be able to come up with an explanation of Lambda

(if this constant vacuum energy density exists and is 0.6 joules per cubic km, like they say it is)

Dont hold your breath though. No idea what Smolin will say but it is too hard a problem to expect solutions to come quickly. Maybe some incremental progress this year...

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