4 papers
Gyrating Strings: A new instability of black strings?
Donald Marolf, Belkis Cabrera Palmer
A thermodynamic argument is presented suggesting that near-extremal spinning D1-D5-P black strings become unstable when their angular momentum exceeds $J_{crit} = {3Q_1Q_5}/2\sqrt{…
Very high quality factor measured in annealed fused silica
Alexandr Ageev, Belkis Cabrera Palmer, Antonio De Felice +2
We present the results of quality factor measurements for rod samples made of fused silica. To decrease the dissipation we annealed our samples. The highest quality factor that we…
Counting Supertubes
Belkis Cabrera Palmer, Donald Marolf
The quantum states of the supertube are counted by directly quantizing the linearized Born-Infeld action near the round tube. The result is an entropy $S = 2π\sqrt{2 (Q_{D0}Q_{F1}-…
On Fast Travel through spherically symmetric spacetimes
Belkis Cabrera Palmer, Donald Marolf
In a static spacetime, the Killing time can be used to measure the time required for signals or objects to propagate between two of its orbits. By further restricting to sphericall…