### David Schaich

AEC Institute for Theoretical Physics University of Bern 3012 Bern, Switzerland |
+41 31 631 8878 (Office) +1 315 415-3277 (Google) Skype: daschaich |

Curriculum Vitae (last modified 3 September 2017)

### Biography

I am a postdoctoral researcher in theoretical particle physics at the University of Bern. I previously worked at Syracuse University (2013–2016) and the University of Colorado Boulder (2011–2013) after studying at Amherst College and completing my PhD at Boston University. I have worked for shorter periods at the Kavli Institute for Theoretical Physics (2016 & 2015); the Humboldt University of Berlin (2015); the Aspen Center for Physics (2015 & 2013); the National Center for Theoretical Sciences, Taipei (2011); Lawrence Livermore National Lab (2010); and CERN, the European Organization for Nuclear Research (2005). In addition to these institutions I have been supported by the U.S. Department of Energy, the U.S. National Science Foundation, and the National Science Council of Taiwan.

### Research [complete overview, GitHub]

I use high-performance computing to gain insight into strongly interacting quantum field theories, primarily in the context of high-energy particle physics. I employ lattice gauge theory, a non-perturbative framework that enables first-principles investigations of strongly coupled systems. Making use of lattice regularization as a broadly applicable tool, I address questions that are important both theoretically and phenomenologically, within and beyond the standard model of particle physics.

My work currently focuses on quantum chromodynamics at non-zero baryon density, supersymmetric lattice field theories and composite Higgs models.

A central aspect of my research is the development and deployment of software for high-performance parallel computing. I do the bulk of my code development publicly through GitHub, and whenever possible I release my programs under open-source free software licenses such as the GNU General Public License.

In order both to contribute to public engagement with science and to recognize taxpayer support of my work over the years, I write non-technical (or at least less-technical) descriptions of my research projects for the general public. This more technical summary provides more concise information for experts.

### Teaching [complete list]

In the 2017 fall semester I will teach a graduate course on **New strong dynamics beyond the standard model**. Details are posted here.

I previously organized informal courses on **Advanced quantum field theory**, at the University of Colorado during 2012–2013 (resources available here) and at Syracuse University during 2013–2014 (resources available here). (Some of the online resources, in particular solutions to textbook problems, are password protected.)

### Recent publications and preprints [complete list, INSPIRE, arXiv, Google]

**Refereed journal articles**

*Novel phases in strongly coupled four-fermion theories*

Simon Catterall and David Schaich

*Physical Review D***96**:034506 (2017) [arXiv:1609.08541, INSPIRE]*Nonperturbative beta function of twelve-flavor SU(3) gauge theory*

Anna Hasenfratz and David Schaich

Submitted to*Journal of High Energy Physics*(2017) [arXiv:1610.10004, INSPIRE]*Strongly interacting dynamics and the search for new physics at the LHC*

LSD Collaboration: Thomas Appelquist, Richard C. Brower, George T. Fleming, Anna Hasenfratz, Xiao-Yong Jin, Joe Kiskis, Ethan T. Neil, James C. Osborn, Claudio Rebbi, Enrico Rinaldi, David Schaich, Pavlos Vranas, Evan Weinberg, Oliver Witzel

*Physical Review D***93**:114514 (2016) [arXiv:1601.04027, INSPIRE]*Detecting Stealth Dark Matter Directly through Electromagnetic Polarizability*

LSD Collaboration: Thomas Appelquist, Evan Berkowitz, Richard C. Brower, Michael I. Buchoff, George T. Fleming, Xiao-Yong Jin, Joe Kiskis, Graham D. Kribs, Ethan T. Neil, James C. Osborn, Claudio Rebbi, Enrico Rinaldi, David Schaich, Chris Schroeder, Sergey Syritsyn, Pavlos Vranas, Evan Weinberg and Oliver Witzel

*Physical Review Letters***115**:171803 (2015, Editors' Suggestion) [arXiv:1503.04205, INSPIRE]*Stealth dark matter: Dark scalar baryons through the Higgs portal*

LSD Collaboration: Thomas Appelquist, Richard C. Brower, Michael I. Buchoff, George T. Fleming, Xiao-Yong Jin, Joe Kiskis, Graham D. Kribs, Ethan T. Neil, James C. Osborn, Claudio Rebbi, Enrico Rinaldi, David Schaich, Chris Schroeder, Sergey Syritsyn, Pavlos Vranas, Evan Weinberg and Oliver Witzel

*Physical Review D***92**:075030 (2015, Editors' Suggestion) [arXiv:1503.04203, INSPIRE]*Lifting flat directions in lattice supersymmetry*

Simon Catterall and David Schaich

*Journal of High Energy Physics***1507**:057 (2015) [arXiv:1505.03135, INSPIRE]*Nonperturbative beta function of eight-flavor SU(3) gauge theory*

Anna Hasenfratz, David Schaich and Aarti Veernala

*Journal of High Energy Physics***1506**:143 (2015) [arXiv:1410.5886, INSPIRE]*Parallel software for lattice N=4 supersymmetric Yang--Mills theory*

David Schaich and Thomas DeGrand

*Computer Physics Communications***190**:200–212 (2015) [arXiv:1410.6971, INSPIRE]*Lattice simulations with eight flavors of domain wall fermions in SU(3) gauge theory*

LSD Collaboration: Thomas Appelquist, Richard C. Brower, George T. Fleming, Joe Kiskis, Meifeng Lin, Ethan T. Neil, James C. Osborn, Claudio Rebbi, Enrico Rinaldi, David Schaich, Chris Schroeder, Sergey Syritsyn, Gennady Voronov, Pavlos Vranas, Evan Weinberg and Oliver Witzel

*Physical Review D***90**:114502 (2014) [arXiv:1405.4752, INSPIRE]

**Conference proceedings**

*Latest results from lattice N=4 supersymmetric Yang--Mills*

David Schaich, Simon Catterall, Poul Damgaard and Joel Giedt

*Proceedings of Science***LATTICE2016**:221 (2016) [arXiv:1611.06561, INSPIRE]*S-duality in lattice super Yang–Mills*

Joel Giedt, Simon Catterall, Poul Damgaard and David Schaich

*Proceedings of Science***LATTICE2016**:209 (2016)*Aspects of lattice N=4 supersymmetric Yang–Mills*

David Schaich

*Proceedings of Science***LATTICE 2015**:242 (2015) [arXiv:1512.01137, INSPIRE]

### Recent presentations [complete list, map]

**Invited talks**

*Lattice gauge theory beyond the standard model*, 20th International Conference From the Planck Scale to the Electroweak Scale, Warsaw, 22 May 2017*Maximally supersymmetric Yang–Mills on the lattice*, University of Edinburgh Higgs Centre Particle Physics Theory Seminar, 23 November 2016*Physics Out Of The Box: The impact of lattice gauge theory*, University of Glasgow, 18 April 2016*Composite dark matter and the role of lattice field theory*, Rensselaer Polytechnic Institute Colloquium, 17 February 2016*Maximally supersymmetric Yang–Mills on the lattice*, Friedrich Schiller University Jena Quantum Theory Seminar, 17 December 2015*Electroweak Phenomenology and Lattice Strong Dynamics*, Humboldt / DESY Lattice Seminar, 23 November 2015*N=4 supersymmetric Yang–Mills on a space-time lattice*, Humboldt University QFT / String Seminar, 18 November 2015*Physics Out Of The Box: The impact of lattice gauge theory and advanced computing*, Stony Brook University Nuclear Theory Seminar, 13 November 2015*Physics Out Of The Box: The impact of lattice gauge theory and large-scale computing*, Michigan State University High Energy Physics Seminar, 3 November 2015

**Contributed talks**

*Phases of a strongly coupled four-fermion theory*, Lattice 2017, Granada, Spain, 22 June 2017*Light scalar from lattice strong dynamics*, 637th Wilhelm und Else Heraeus-Seminar "Understanding the LHC", Bad Honnef, Germany, 14 February 2017*Lattice N=4 SYM*, University of Bern Institute for Theoretical Physics lunch seminar, 13 October 2016

Last modified 5 September 2017