3,478 research outputs found
Sine-Gordon Field Theory for the Kosterlitz-Thouless Transitions on Fluctuating Membranes
In the preceding paper, we derived Coulomb-gas and sine-Gordon Hamiltonians
to describe the Kosterlitz-Thouless transition on a fluctuating surface. These
Hamiltonians contain couplings to Gaussian curvature not found in a rigid flat
surface. In this paper, we derive renormalization-group recursion relations for
the sine-Gordon model using field-theoretic techniques developed to study flat
space problems.Comment: REVTEX, 14 pages with 6 postscript figures compressed using uufiles.
Accepted for publication in Phys. Rev.
Routine data linkage to identify and monitor diabetes in clozapine-treated patients with schizophrenia
No abstract available
Brand Congruity and Comparative Advertising: When and Why Comparative Advertisements Lead to Greater Elaboration
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/144263/1/jcpy115.pd
String solitons in the M5-brane worldvolume with a Nambu-Poisson structure and Seiberg-Witten map
We analyze BPS equations for string-like configurations derived from the
M5-brane worldvolume action with a Nambu-Poisson structure constructed in
arXiv:0804.3629, arXiv:0805.2898. We solve the BPS equations up to the first
order in the parameter which characterizes the strength of the
Nambu-Poisson bracket. We compare our solutions to previously constructed BPS
string solitons in the conventional description of M5-brane in a constant
three-form background via Seiberg-Witten map, and find agreement.Comment: v2: minor corrections, the title slightly changed. 10 pages. v3: some
clarifying comment
Why social networks are different from other types of networks
We argue that social networks differ from most other types of networks,
including technological and biological networks, in two important ways. First,
they have non-trivial clustering or network transitivity, and second, they show
positive correlations, also called assortative mixing, between the degrees of
adjacent vertices. Social networks are often divided into groups or
communities, and it has recently been suggested that this division could
account for the observed clustering. We demonstrate that group structure in
networks can also account for degree correlations. We show using a simple model
that we should expect assortative mixing in such networks whenever there is
variation in the sizes of the groups and that the predicted level of
assortative mixing compares well with that observed in real-world networks.Comment: 9 pages, 2 figure
Near-Horizon Conformal Symmetry and Black Hole Entropy in Any Dimension
Recently, Carlip proposed a derivation of the entropy of the two-dimensional
dilatonic black hole by investigating the Virasoro algebra associated with a
newly introduced near-horizon conformal symmetry. We point out not only that
the algebra of these conformal transformations is not well defined on the
horizon, but also that the correct use of the eigenvalue of the operator
yields vanishing entropy. It has been shown that these problems can be resolved
by choosing a different basis of the conformal transformations which is regular
even at the horizon. We also show the generalization of Carlip's derivation to
any higher dimensional case in pure Einstein gravity. The entropy obtained is
proportional to the area of the event horizon, but it also depends linearly on
the product of the surface gravity and the parameter length of a horizon
segment in consideration. We finally point out that this derivation of black
hole entropy is quite different from the ones proposed so far, and several
features of this method and some open issues are also discussed.Comment: 14 pages, no figur
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