- #1
Antonio Lao
- 1,440
- 1
Can the complete physical structure of the universe be described by a two-brane matrix?
First, we need some key words taken from the glossary of Brian Greene's book "The Elegant Universe."
Brane. Any of the extended objects that arise in string theory. A one-brane is a string, a two-brane is a membrane, a three-brane has three extended dimensions, etc. More generally, a p-brane has p spatial dimensions.
Closed string. A type of string that is in the shape of a loop.
Open string. A type of string with two free ends.
Curled-up dimension. A spatial dimension that does not have an observably large spatial extent; a spatial dimension that is crumpled, wrapped, or curled up into a tiny size, therby evading direct detection.
Extended dimension. A space (and spactime) dimension that is large and directly apparent; a dimension with which we are ordinarily familiar, as opposed to a curled-up dimension.
Dimension. An independent axis or direction in space or of spacetime. The familiar space around us has three dimensions (left-right, back-forth, up-down) and the familiar spacetime has four (the previous three axes plus the past-future axis).
Note: Although superstring theory requires the universe to have additional spatial dimensions, it is the purpose of this thread to show otherwise.
First, we need some key words taken from the glossary of Brian Greene's book "The Elegant Universe."
Brane. Any of the extended objects that arise in string theory. A one-brane is a string, a two-brane is a membrane, a three-brane has three extended dimensions, etc. More generally, a p-brane has p spatial dimensions.
Closed string. A type of string that is in the shape of a loop.
Open string. A type of string with two free ends.
Curled-up dimension. A spatial dimension that does not have an observably large spatial extent; a spatial dimension that is crumpled, wrapped, or curled up into a tiny size, therby evading direct detection.
Extended dimension. A space (and spactime) dimension that is large and directly apparent; a dimension with which we are ordinarily familiar, as opposed to a curled-up dimension.
Dimension. An independent axis or direction in space or of spacetime. The familiar space around us has three dimensions (left-right, back-forth, up-down) and the familiar spacetime has four (the previous three axes plus the past-future axis).
Note: Although superstring theory requires the universe to have additional spatial dimensions, it is the purpose of this thread to show otherwise.