BTZ Trailing Strings

Iosif Bena (1) , Alexander Tyukov

1 IPHT - Institut de Physique Théorique - UMR CNRS 3681

We compute holographically the energy loss of a moving quark in various states of the D1-D5 CFT. In the dual bulk geometries, the quark is the end of a trailing string, and the profile of this string determines the drag force exerted by the medium on the quark. We find no drag force when the CFT state has no momentum, and a nontrivial force for any value of the velocity (even at rest) when the string extends in the supersymmetric D1-D5-P black-hole geometry, or a horizonless microstate geometry thereof. As the length of the throat of the microstate geometry increases, the drag force approaches the thermal BTZ expression, confirming the ability of these microstate geometries to capture typical black-hole physics. We also find that when the D1-D5-P black hole is non-extremal, there is a special value of the velocity at which a moving quark feels no force. We compute this velocity holographically and we compare it to the velocity computed in the CFT.

Mots clés: Black Holes in String Theory; Holography and quark-gluon plasmas; AdS-CFT Correspondence; Gauge-gravity correspondence; field theory: conformal; black hole: geometry; velocity; quark: string; drag force; holography; BTZ; energy loss; D-brane

Domaines: Physique des Hautes Energies - Théorie [hep-th]

Iosif Bena, Alexander Tyukov. BTZ Trailing Strings. Journal of High Energy Physics, 2020, 04, pp.046. ⟨10.1007/JHEP04(2020)046⟩. ⟨hal-02416897⟩