Professor Susskind explains the behavior of open and closed strings in periodic dimensions. The endpoints of open strings are seen to be stuck on surfaces known as D-branes. The behavior of these open strings can model more traditional field theories with the end points taking the role of particles with charges (electric or color).
- More on T-duality
- Neumann boundary conditions lead to D-branes
- Modeling field theories like QCD or QED with strings