Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
2004-04-20
Phys.Rev. D70 (2004) 084045
Physics
High Energy Physics
High Energy Physics - Theory
6 pages, revtex4, zero of Hessian noted, references added
Scientific paper
10.1103/PhysRevD.70.084045
A thermodynamic argument is presented suggesting that near-extremal spinning D1-D5-P black strings become unstable when their angular momentum exceeds $J_{crit} = {3Q_1Q_5}/2\sqrt{2}$. In contrast, the dimensionally reduced black holes are thermodynamically stable. The proposed instability involves a phase in which the spin angular momentum above $J_{crit}$ is transferred to gyration of the string in space; i.e., to orbital angular momentum of parts of the string about the mean location in space. Thus the string becomes a rotating helical coil. We note that an instability of this form would yield a counter-example to the Gubser-Mitra conjecture, which proposes a particular link between dynamic black string instabilities and the thermodynamics of black strings. There may also be other instabilities associated with radiation modes of various fields. Our arguments also apply to the D-brane bound states associated with these black strings in weakly coupled string theory.
Cabrera Palmer Belkis
Marolf Donald
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