1,281 research outputs found
On the energy deposited by a quark moving in an N=4 SYM plasma
We evaluate the energy momentum tensor of a massive quark as it moves through
an N=4 SYM quark gluon plasma at constant velocity. We find that in the
near-quark region, where the dynamics is expected to be dominated by
dissipative behavior, the energy density may be quantitatively characterized by
a transient at velocities above the speed of sound of the plasma.Comment: 19 pages, 1 figure; Typos corrected, references adde
The Legend at Lincoln: A Historical Perspective of Laverne Lessor
Written interview with Laverne Lessor for Dr. Allan Millerhttps://scholars.fhsu.edu/ors/1262/thumbnail.jp
Counter-examples to the correlated stability conjecture
We demonstrate explicit counter-examples to the Correlated Stability
Conjecture (CSC), which claims that the horizon of a black brane is unstable
precisely if that horizon has a thermodynamic instability, meaning that its
matrix of susceptibilities has a negative eigenvalue. These examples involve
phase transitions near the horizon. Ways to restrict or revise the CSC are
suggested. One of our examples shows that N=1* gauge theory has a second order
chiral symmetry breaking phase transition at a temperature well above the
confinement scale.Comment: 18 pages, 5 figures. v2: minor improvements, reference adde
The stress tensor of a quark moving through N=4 thermal plasma
We develop the linear equations that describe graviton perturbations of
AdS_5-Schwarzschild generated by a string trailing behind an external quark
moving with constant velocity. Solving these equations allows us to evaluate
the stress tensor in the boundary gauge theory. Components of the stress tensor
exhibit directional structures in Fourier space at both large and small
momentum. We comment on the possible relevance of our results to relativistic
heavy ion collisions.Comment: 33 pages, 5 figures. v2: improved low K discussion; other minor
improvement
Eingeladener Kommentar zu: "Der prognostische Wert der p53-Immunhistochemie beim Gallenblasenkarzinom"
Simple derivation of the frequency dependent complex heat capacity
This paper gives a simple derivation of the well-known expression of the
frequency dependent complex heat capacity in modulated temperature experiments.
It aims at clarified again that the generalized calorimetric susceptibility is
only due to the non-equilibrium behaviour occurring in the vicinity of
thermodynamic equilibrium of slow internal degrees of freedom of a sample when
the temperature oscillates at a well determined frequency
- …