# What are Branes?

I am having a hard time understanding branes, especially the P-branes and the D-branes, so could someone put it in simple words?

Chronos
Gold Member
It's an imaginary construct that exists in higher dimensions under string theory - in other words, it lacks observational support.

Chalnoth
A brane is a surface with some specific number of dimensions. Surfaces in our three-dimensional world, for example, are two-dimensional. Because string theory has more dimensions (10 in superstring theory, for example), it is sensible for surfaces to have more dimensions than just two. It is impossible for humans to visualize these higher-dimensional objects, but easy enough to write down their properties mathematically.

They arise from string theory because one of the ways you can define the strings is for the endpoints of the strings to be confined to a specific boundary. So the branes serve as a sort of anchor point that strings attach to.

Bystander
It's an imaginary construct that exists in higher dimensions under string theory - in other words, it lacks observational support.
What does it do or sopposed to do and what are P-branes?

bapowell