57,695 research outputs found
Fully QED/relativistic theory of light pressure on free electrons by isotropic radiation
A relativistic/QED theory of light pressure on electrons by an isotropic, in
particular blackbody radiation predicts thermalization rates of free electrons
over entire span of energies available in the lab and the nature. The
calculations based on the QED Klein-Nishina theory of electron-photon
scattering and relativistic Fokker-Planck equation, show that the transition
from classical (Thompson) to QED (Compton) thermalization determined by the
product of electron energy and radiation temperature, is reachable under
conditions for controlled nuclear fusion, and predicts large acceleration of
electron thermalization in the Compton domain and strong damping of plasma
oscillations at the temperatures near plasma nuclear fusion.Comment: 9 pages, 2 figures. arXiv admin note: substantial text overlap with
arXiv:1410.695
Conformal Blocks Beyond the Semi-Classical Limit
Black hole microstates and their approximate thermodynamic properties can be
studied using heavy-light correlation functions in AdS/CFT. Universal features
of these correlators can be extracted from the Virasoro conformal blocks in
CFT2, which encapsulate quantum gravitational effects in AdS3. At infinite
central charge c, the Virasoro vacuum block provides an avatar of the black
hole information paradox in the form of periodic Euclidean-time singularities
that must be resolved at finite c.
We compute Virasoro blocks in the heavy-light, large c limit, extending our
previous results by determining perturbative 1/c corrections. We obtain
explicit closed-form expressions for both the `semi-classical'
and `quantum' corrections to the vacuum block, and we provide
integral formulas for general Virasoro blocks. We comment on the interpretation
of our results for thermodynamics, discussing how monodromies in Euclidean time
can arise from AdS calculations using `geodesic Witten diagrams'. We expect
that only non-perturbative corrections in 1/c can resolve the singularities
associated with the information paradox.Comment: 24+7 pages, 5 figures; v2 fixed typo in eq 2.22, added refs; v3 fixed
typo
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