Light Eye
04-25-2006, 11:23 PM
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]