55 research outputs found
A Unique Theory of Gravity and Matter
The author has previously suggested that the ground state for 4-dimensional
quantum gravity can be represented as a condensation of non-linear gravitons
connected by Dirac strings. In this note we suggest that the low-lying
excitations of this state can be described by a quasi-topological action
corresponding to a trilinear coupling of solitonic 8-branes and 7-branes. It is
shown that when the 7-brane excitations are neglected, the effective action can
be interpreted as a theory of conformal gravity in four dimensions. This
suggests that ordinary gravity as well as supersymmetric matter and
phenomenological gauge symmetries arise from the spontaneous breaking of
topological invariance.Comment: PostScript, 12 page
Dark Energy Stars and AdS/CFT
The theory of dark energy stars illustrates how the behavior of matter near
to certain kinds of quantum critical phase transitions can be given a
geometrical interpretation by regarding the criticality tuning parameter as an
extra dimension. In the case of a superfluid with vanishing speed of sound, the
implied geometry resembles 5-dimensional anti-de-Sitter. In a dark energy star
this geometry applies both inside and outside the horizon radius, so the
AdS-CFT correspondence is consistent with the idea that the surface of a
compact astrophysical object represents a quantum critical phase transition of
space-time. The superfluid transition in a chiron gas, which was originally
proposed as a theory of high temperature superconductivity, may provide an
exact theory of this transition.Comment: Talk at the 12th Marcel Grossman Meetin
Minimum Energy Information Fusion in Sensor Networks
In this paper we consider how to organize the sharing of information in a
distributed network of sensors and data processors so as to provide
explanations for sensor readings with minimal expenditure of energy. We point
out that the Minimum Description Length principle provides an approach to
information fusion that is more naturally suited to energy minimization than
traditional Bayesian approaches. In addition we show that for networks
consisting of a large number of identical sensors Kohonen self-organization
provides an exact solution to the problem of combining the sensor outputs into
minimal description length explanations.Comment: postscript, 8 pages. Paper 65 in Proceedings of The 2nd International
Conference on Information Fusio
Sentient Networks
In this paper we consider the question whether a distributed network of
sensors and data processors can form "perceptions" based on the sensory data.
Because sensory data can have exponentially many explanations, the use of a
central data processor to analyze the outputs from a large ensemble of sensors
will in general introduce unacceptable latencies for responding to dangerous
situations. A better idea is to use a distributed "Helmholtz machine"
architecture in which the collective state of the network as a whole provides
an explanation for the sensory data.Comment: PostScript, 14 page
The Monster Sporadic Group and a Theory Underlying Superstring Models
The pattern of duality symmetries acting on the states of compactified
superstring models reinforces an earlier suggestion that the Monster sporadic
group is a hidden symmetry for superstring models. This in turn points to a
supersymmetric theory of self-dual and anti-self-dual K3 manifolds joined by
Dirac strings and evolving in a 13 dimensional spacetime as the fundamental
theory. In addition to the usual graviton and dilaton this theory contains
matter-like degrees of freedom resembling the massless states of the heterotic
string, thus providing a completely geometric interpretation for ordinary
matter.Comment: 14 pages; PostScrip
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