Light Eye
04-26-2006, 12:23 AM
dear friends,
http://physorg.com/news65200818.html
be well, be love.
david
our universe: a quantum loop
?there are two classical branches of the universe connected by a quantum
bridge. this connects the former collapse with the current expansion.? while
abhay ashtekar and his colleagues, tomasz pawlowski and parampreet singh, may
not have come with a completely new theory, what they have done is create a
systematic way, through quantum equations, to look back in time to the birth of
our current universe.
ashtekar?s team from pennsylvania state university?s institute for
gravitational physics and geometry published a letter in physical review letters
on april 12th, detailing what was found, and shedding a little more light on
what actually happened at the time the universe began expanding.
?the idea of a bounce has been around for a while,? ashtekar explains to
physorg.com, ?and it has been looked at in many contexts. one of them is string
theory.? he continues: ?the pre-big bang cosmology considered the idea that a
branch of the universe existed before the big bang, and in the ekpyrotic
scenario, a `brane? collides with another `brane,? causing a bounce.?
what makes the psu explanation different, says ashtekar, is the fact that while
it was assumed that there might possibly be something before the big bang, a
systematic determination of what that might have been was missing. additionally,
?one never had systematic equations that are determinate, leading from the pre-
to post-big bang branches of the universe.?
[non-text portions of this message have been removed]
http://physorg.com/news65200818.html
be well, be love.
david
our universe: a quantum loop
?there are two classical branches of the universe connected by a quantum
bridge. this connects the former collapse with the current expansion.? while
abhay ashtekar and his colleagues, tomasz pawlowski and parampreet singh, may
not have come with a completely new theory, what they have done is create a
systematic way, through quantum equations, to look back in time to the birth of
our current universe.
ashtekar?s team from pennsylvania state university?s institute for
gravitational physics and geometry published a letter in physical review letters
on april 12th, detailing what was found, and shedding a little more light on
what actually happened at the time the universe began expanding.
?the idea of a bounce has been around for a while,? ashtekar explains to
physorg.com, ?and it has been looked at in many contexts. one of them is string
theory.? he continues: ?the pre-big bang cosmology considered the idea that a
branch of the universe existed before the big bang, and in the ekpyrotic
scenario, a `brane? collides with another `brane,? causing a bounce.?
what makes the psu explanation different, says ashtekar, is the fact that while
it was assumed that there might possibly be something before the big bang, a
systematic determination of what that might have been was missing. additionally,
?one never had systematic equations that are determinate, leading from the pre-
to post-big bang branches of the universe.?
[non-text portions of this message have been removed]