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38 papers · 1 filter
A Joint Sunyaev-Zel'dovich Effect and X-ray Analysis of Abell 3667
C. M. Cantalupo, A. K. Romer, J. B. Peterson +4
We present a 40GHz (7.5 mm) raster scan image of a 3.6x2 degree region centered on the low redshift (z=0.055) cluster of galaxies Abell 3667. The cluster was observed during the An…
Anharmonic Self-Energy of Phonons: Ab Initio Calculations and Neutron Spin Echo Measurements
A. Debernardi, F. de Geuser, J. Kulda +2
We have calculated (ab initio) and measured (by spin-echo techniques) the anharmonic self-energy of phonons at the X-point of the Brillouin zone for isotopically pure germanium. Th…
Trees and matchings from point processes
Alexander E. Holroyd, Yuval Peres
A factor graph of a point process is a graph whose vertices are the points of the process, and which is constructed from the process in a deterministic isometry-invariant way. We p…
Molecular Abundances in B68
J. Di Francesco, M. R. Hogerheijde, W. J. Welch +1
Abundances for C18O, CS, NH3, H2CO, C3H2, and N2H+ and upper limits for the abundances of 13CO and HCO+ are derived for gas within the Bok globule B68 using our own BIMA array data…
Quantum Algorithms for some Hidden Shift Problems
Wim van Dam, Sean Hallgren, Lawrence Ip
Almost all of the most successful quantum algorithms discovered to date exploit the ability of the Fourier transform to recover subgroup structure of functions, especially periodic…
Cayley compactifications of abelian groups
Mike Develin
Following work of Rieffel, we define the Cayley compactification of an abelian group with specified generating set. We investigate its structure using methods from discrete geometr…