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    I am an astronomer, cosmologist, and data scientist, currently a NSF funded Assistant Research Scientist at the UC San Diego Center for Astrophysics & Space Sciences (CASS) and a Research Affiliate in the MIT STS Program. I work on several theoretical and observational projects to devise and implement fun experiments that leverage cosmology to test fundamental physics, including novel tests of quantum theory using with astronomical observations, searches for exotic new physics with optical polarization studies of distant galaxies, as well as Infrared and Optical studies of Supernovae with ground and space based telescopes to measure the expansion history of the universe, cosmic acceleration, and dark energy. I enjoy exploring fascinating scientific questions at the intersection between observational astronomy, astrophysics, data analysis, and the philosophy of science through research, science writing, art, animation, public outreach, and science media engagement. For more, see my Bio, Resume, and CV.
Media Coverage

TV Documentary teaser, by PBS NOVA, S46, E2, premiers Wed, Jan 9 2019 [Buy DVD] [TV]
You Tube video from Wochit News based on this Science News article. The end of the video is incorrect. Our experiment used photons from Milky Way stars to choose measurement settings in a Bell test with entangled particles generated here on Earth. We are actually trying to ensure that the stellar photons are as un-entangled as possible! Also, the stars are not separated by 600 light years from each other. In fact, the nearest of the two stars in each run of our experiment was about 600 light years away from Earth.
Our proposed experiment to use cosmic sources like quasars to set the detectors in a Bell inequality test is mentioned (directly or obliquely) in the context of an amazing experiment by researchers at Delft University of Technology, which closed two of the three major loopholes simultaneously for the first time.
An excellent introductory video series about quantum mechanics and free will. Links to some articles on our cosmic Bell proposal.

“Using GRBs For Cosmology” by Andrew Friedman,Sky & Telescope, Vol. 112, No. 8, p35, 2006 [PDF] (with Robert Naeye article below)
“Gamma Ray Bursts: New Cosmic Rulers?” by Robert Irion atScience, Vol. 306, Issue 5694, pp. 215, Oct 8 2004 [PDF]
Our group developed an improved Astronomical Random Number Generator (ARNG) in an effort led by Jason Gallichio and Calvin Leung at Harvey Mudd College. By observing the color of light from distant cosmic sources such as extragalactic quasars, the ARNG can be used to make ``random'' measurement choices in foundational tests of quantum theory, including test of Bell's inequality, delayed choice interferometry tests, and delayed choice quantum eraser experiments, all in the spirit of John Wheeler's cosmic delayed choice thought experiments.
Our cosmic Bell project in the context of the Big Bell test, a fun, global experiment (run, in part, by our collaborators in Vienna) that used human volunteers to make ``random'' measurement choices in a large test of Bell's inequality.

University of California, San Diego UCSD Center for Astrophysics & Space Sciences Massachusetts Institute of Technology MIT Center for Theoretical Physics Institute for Quantum Optics and Quantum Information, Vienna Harvard University Astronomy Harvard-Smithsonian Center for Astrophysics UC Berkeley Astronomy National Science Foundation National Aernautics & Space Administration
MIT Vera
Tufts/MIT Cosmo
Last Updated: Andrew Samuel Friedman, 6/2017

University of California, San Diego, 9500 Gilman Drive
CASS, M/C 0424, SERF Bldg. 334, La Jolla, CA 92093-0424, USA (858) 534-5416

This material is based upon work supported by the National Science Foundation under NSF Award #1056580 (2012-2014) through an NSF Science, Technology, and Society Postdoctoral Fellowship at MIT and the NSF INSPIRE program via NSF Award #1541160 (2015-2019).

Original animations are shared under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 US License
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