25,325 research outputs found
On the spectrum of nonrelativistic AdS/CFT
We develop a Hamiltonian picture for a family of models of nonrelativistic
AdS/CFT duality. The Schrodinger group is realized via the conformal quantum
mechanics of De Alfaro, Fubini and Furlan in the holographic direction. We show
that most physical requirements, including the introduction of harmonic traps,
can be realized with exact AdS metrics, but without any need for exotic matter
sectors in the bulk dynamics. This Hamiltonian picture can be used to compare
directly with many-body spectra of fermions at unitarity on harmonic traps,
thereby providing a direct physical interpretation of the holographic radial
coordinate for these systems. Finally, we add some speculations on the
dynamical generation of mass gaps in the AdS description, the resulting
quasiparticle spectra, and the analog of `deconfining' phase transitions that
may occur.Comment: 20 pages and 1 figure; typos corrected, references added; references
added, minor changes matching published versio
Bayesian Analysis of Simple Random Densities
A tractable nonparametric prior over densities is introduced which is closed
under sampling and exhibits proper posterior asymptotics.Comment: 19 pages; 6 figure
Charm Meson Mixing: An Experimental Review
We review current experimental results on charm mixing and CP violation. We
survey experimental techniques, including time-dependent, time-independent, and
quantum-correlated measurements. We review techniques that use a slow pion tag
from D*+ --> pi+ D0 + c.c. decays and those that do not, and cover two-body and
multi-body D0 decay modes. We provide a summary of D-mixing results to date and
comment on future experimental prospects at the LHC and other new or planned
facilities.Comment: 53 pages, 29 figures, 8 table
Predictive analysis of microarray data
Microarray gene expression data are analyzed by means of a Bayesian
nonparametric model, with emphasis on prediction of future observables,
yielding a method for selection of differentially expressed genes and a
classifier
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