• Article  

      Flux backgrounds in 2D string theory 

      Gukov, S.; Takayanagi, Tadashi; Toumbas, Nicolaos K. (2004)
      We study RR flux backgrounds in two dimensional type 0 string theories. In particular, we study the relation between the 0A matrix model and the extremal black hole in two dimensions. Using T-duality we find a dual flux ...
    • Article  

      How Bob Laughlin tamed the giant graviton from Taub-NUT space 

      Bernevig, B. A.; Susskind, L.; Toumbas, Nicolaos K.; Brodie, J. H. (2001)
      In this paper we show how two dimensional electron systems can be modeled by strings interacting with D-branes. The dualities of string theory allow several descriptions of the system. These include descriptions in terms ...
    • Article  

      Invasion of the giant gravitons from anti-de Sitter space 

      McGreevy, J.; Susskind, L.; Toumbas, Nicolaos K. (2000)
      It has been known for some time that the AdS/CFT correspondence predicts a limit on the number of single particle states propagating on the compact spherical component of the AdS x S geometry. The limit is called the stringy ...
    • Article  

      Noncommutative geometry, quantum effects and DBI-scaling in the collapse of D0-D2 bound states 

      Papageorgakis, Constantinos; Ramgoolam, S.; Toumbas, Nicolaos K. (2006)
      We study fluctuations of time-dependent fuzzy two-sphere solutions of the non-abelian DBI action of D0-branes, describing a bound state of a spherical D2-brane with N D0-branes. The quadratic action for small fluctuations ...