University of Minnesota
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Andrew Matas

PAN 323 (office)
amatas @

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Summary of Interests
Gravitational Waves, Stochastic Background, Detector Characterization, Tests of General Relativity

About My Work

I am a member of the LIGO Scientific Colloboration (LSC). I focus on searches for the stochastic gravitational wave background. There are several sources for the background. For example, a background of primordial gravitational waves is predicted by cosmic inflation, as well as phase transitions in the early universe and from cosmic string networks. Additionally, an astrophysical background can be generated from individual point sources (for example, binary black holes) too faint to detect individually.

I also am involved in studying Newtonian noise with the Homestake array, a multi-disciplinary project involving gravitational wave physicists as well as seismologists. The results from this array can inform the design of future ground-based gravitational wave detectors.

I am also interested in modifications of gravity. Previously, I studied theories of massive gravity. Currently, I am part of the group at Advanced LIGO looking for non-tensor polarizations in the stochastic background. A discovery of non-tensor modes would be a smoking gun signature that General Relativity needs to be modified.

In January-March 2017, I served as an LSC Fellow working on site at LIGO Livingston. In addition to helping with data quality, I helped to upgrade the plane monitor using microphone data. I also performed studies of magnetic noise.

Selected Publications

T. Callister, et al., Tests of General Relativity with the Stochastic Gravitational-Wave Background, arXiv:1704.08373

B. P. Abbott, et al. (LIGO Scientific and Virgo Collaborations), Upper Limits on the Stochastic Gravitational-Wave Background from Advanced LIGO's First Observing Run, Phys. Rev. Lett.

B. P. Abbott, et al (LIGO and Virgo Collaborations), Directional limits on persistent gravitational waves from Advanced LIGO's first observing run, Phys. Rev. Lett.

A. Matas, Cutoff for Extensions of Massive Gravity and Bi-Gravity, Class. Quant. Grav.

C. de Rham, A. Matas and A. J. Tolley,, New Kinetic Interactions for Massive Gravity?', Class. Quant. Grav.

K. Hinterbichler, J. Khoury, A. Levy and A. Matas, Symmetron Cosmology, Phys. Rev. D


PhD in Physics, Case Western Reserve University, 2016
BA (Summa Cum Laude with Distinction in Physics), University of Pennsylvania 2011
Minor in Computer Science, University of Pennsylvania 2011