Journal article
Measurement of the cosmic microwave background polarization lensing power spectrum with the POLARBEAR experiment
PAR Ade, Y Akiba, AE Anthony, K Arnold, M Atlas, D Barron, D Boettger, J Borrill, S Chapman, Y Chinone, M Dobbs, T Elleflot, J Errard, G Fabbian, C Feng, D Flanigan, A Gilbert, W Grainger, NW Halverson, M Hasegawa Show all
Physical Review Letters | Published : 2014
Abstract
Gravitational lensing due to the large-scale distribution of matter in the cosmos distorts the primordial cosmic microwave background (CMB) and thereby induces new, small-scale B-mode polarization. This signal carries detailed information about the distribution of all the gravitating matter between the observer and CMB last scattering surface. We report the first direct evidence for polarization lensing based on purely CMB information, from using the four-point correlations of even- and odd-parity E- and B-mode polarization mapped over ∼30 square degrees of the sky measured by the POLARBEAR experiment. These data were analyzed using a blind analysis framework and checked for spurious systema..
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Awarded by Natural Sciences and Engineering Research Council of Canada
Funding Acknowledgements
This work was supported by the Director, Office of Science, Office of High Energy Physics, of the U.S. Department of Energy under Contract No. DE-AC0205CH11231. The computational resources required for this work were accessed via the GlideinWMS [36] on the Open Science Grid [37]. This project used the CAMB and FFTW software packages. Calculations were performed on the Department of Energy Open Science Grid at the University of California, San Diego, the Central Computing System, owned and operated by the Computing Research Center at KEK, and the National Energy Research Scientific Computing Center, which is supported by the Department of Energy under Contract No. DE-AC0205-CH11231. The POLARBEAR project is funded by the National Science Foundation under Grants No. AST-0618398 and No. AST-1212230. The KEK authors were supported by MEXT KAKENHI Grant No. 21111002, and acknowledge support from KEK Cryogenics Science Center. The McGill authors acknowledge funding from the Natural Sciences and Engineering Research Council and Canadian Institute for Advanced Research. We thank Marc Kamionkowski and Kim Griest for useful discussions and comments. B. D. S. acknowledges support from the Miller Institute for Basic Research in Science, N. M. acknowledges support from the NASA Postdoctoral Program, and K. A. acknowledges support from the Simons Foundation. M. S. gratefully acknowledges support from Joan and Irwin Jacobs. All silicon wafer-based technology for POLARBEAR was fabricated at the UC Berkeley Nanolab. We are indebted to our Chilean team members, Nolberto Oyarce and Jose Cortes. The James Ax Observatory operates in the Parque Astronomico Atacama in Northern Chile under the auspices of the Comision Nacional de Investigacion Cientifica y Tecnologica de Chile (CONICYT). Finally, we would like to acknowledge the tremendous contributions by Huan Tran to the POLARBEAR project.