Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2001-06-15
Nucl.Phys.B610:3-48,2001
Physics
High Energy Physics
High Energy Physics - Theory
51 pages, 8 figures; v2: references added, typos corrected
Scientific paper
10.1016/S0550-3213(01)00333-9
We study the spectrum of open strings on AdS_2 branes in AdS_3 in an NS-NS background, using the SL(2,R) WZW model. When the brane carries no fundamental string charge, the open string spectrum is the holomorphic square root of the spectrum of closed strings in AdS_3. It contains short and long strings, and is invariant under spectral flow. When the brane carries fundamental string charge, the open string spectrum again contains short and long strings in all winding sectors. However, branes with fundamental string charge break half the spectral flow symmetry. This has different implications for short and long strings. As the fundamental string charge increases, the brane approaches the boundary of AdS_3. In this limit, the induced electric field on the worldvolume reaches its critical value, producing noncommutative open string theory on AdS_2.
Lee Peter
Ooguri Hirosi
Park Jongwon
Tannenhauser Jonathan
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