Physics Faculty

From classic Newtonian dynamics to quantum mechanics, Department of Physics courses cover the range of laws that govern our universe, and how to apply them. Students will put their knowledge to use with circuit work, acoustics and sound generation, dynamic modeling techniques, and even physics for animation. Faculty experience ranges all the way from astrophysics to computational physics simulation.

Department Faculty

Natalia Solorzano, Ph.D.

Department Chair
Associate Professor

Natalia N. Solorzano holds a Bachelor of Science in Physics from the Federal University of Minas Gerais in Brazil, as well as a Master of Science in Meteorology and a doctorate in Space Geophysics from the National Institute for Space Research in Brazil. She was previously a Postdoctoral Research Scientist at the University of Washington and an Assistant Professor at Bard High School Early College. She conducts research, often with DigiPen students, in atmospheric physics and physics-based simulation. Her research interests include atmospheric electricity and lightning, the global atmospheric circuit, passive microwave remote sensing, and tropical cyclones.

Dr. Solorzano publishes her work in journals such as Atmospheric Environment, Atmospheric Research, Eos (Earth and Space Science News), and Geophysical Research Letters. She often gives invited and contributed presentations at meetings, including the American Meteorological Society Annual Meeting, the IEEE International Geoscience and Remote Sensing Symposium, the Asia Oceania Geosciences Society Annual Meeting, and the American Geophysical Union Fall Meeting. She is a steering committee member of the atmospheric electricity section of the American Meteorological Society. In 2008, along with Jeremy Thomas, she was recipient of a Science and Math Improvement Grant from the Toshiba America Foundation. In 2017, they received the Amazon Catalyst Award of Merit, along with BS in Computer Science graduate Connor Bracy and Professor Robert Holzworth from the University of Washington. The project, a real-time tropical cyclone and lightning database, can be found at: http://wwlln.net/storms/. In the same year, Thomas and Solorzano were also awarded a National Science Foundation grant for the project “Collaborative Research: Balloon Campaign to Quantify Thunderstorm Effects on the Global Electric Circuit.”

At DigiPen, Dr. Solorzano is the chair of the Physics Department, chair of the Diversity Committee, and a member of the Faculty Senate Steering Committee. Her teaching philosophy is geared towards experiential learning, engaging students in critical thinking, and encouraging students to take ownership of their education. She also believes that cultural, economic, and social diversity enhance the learning environment, and she is committed to increasing the diversity of students and faculty.

Selected Publications from 2016-2017

Solorzano, N. N., Thomas, J. N., Bracy, C. (2017), “Real-time monitoring of tropical cyclones with lightning and microwave imagery,” Eos, Project Update (manuscript accepted; in production phase Nov 2017).
Solorzano, N. N., Thomas, J. N., Hutchins, M. L., and Holzworth R. H., (2016), “WWLLN lightning and satellite microwave radiometrics at 37 to 183 GHz: Thunderstorms in the broad tropics,” J. Geophys. Res. Atmos., 121, 12,298–12,318, doi:10.1002/ 2016JD025374.

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A DigiPen Team Is Changing How We Monitor Tropical Cyclones, and NASA is Noticing

Erik Mohrmann, Ph.D

Dean of Faculty
Professor

Dr. Erik Mohrmann studied psychology and physics at Rensselaer Polytechnic Institute in Troy, NY. He then moved to Seattle and earned his doctorate in physics at the University of Washington. He thoroughly enjoyed teaching at both institutions and has continued his teaching career at DigiPen Institute of Technology.

Mohrmann’s academic interests include learning models, the biological basis of behavior, nuclear astrophysics, and computational physics simulation, with most of his research in the latter two areas. His current research interests include stellar nuclear reactions and the modeling of deformable bodies.

Professor Mohrmann believes it is of critical importance to make topics pertinent, comprehensible, and interesting to each specific audience, because physicists, engineers, and artists all approach topics from different angles. His research helps him relate classroom physics to the world we all experience every day, and provides guidance to undergraduates and graduates who are researching topics in simulation.

Selected Publications

Mohrmann, E. C., et al, “The 7Be(p,γ)8B Astrophysical S-Factor,” Nuclear Physics A 758 (2005): 685-688.
Mohrmann, E. C., et al, “New Determination of the 7Be(p,γ)8B S-Factor,” Nuclear Physics A 746 (2004): 210-214.
Mohrmann, E. C., et al, “Precise Measurement of the 7Be(p,γ)8B S-Factor.” Physical Review C 68, no. 6 (2003): 065803.
Mohrmann, E. C., et al, “A New Measurement of 7Be(p,γ)8B Cross Section and Its Astrophysical Meaning.” Nuclear Physics A 718 (2003): 113-116.
Mohrmann, E. C., et al, “7Be(p,γ)8B Astrophysical S Factor from Precision Cross Section Measurements.” Physical Review Letters 88, no. 4 (2002): 041101.
Mohrmann, E. C., et al, “The Fabrication of Metallic 7Be Targets with a Small Diameter for 7Be(p,γ)8B Measurements.” Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 187, no. 2 (2002): 264-274.
Mohrmann, E. C., et al, “A New Determination of the Astrophysical S-Factor for the 7Be(p,γ)8B Reaction from Direct Cross Section Measurements.” AIP Conference Proceedings 610, no. 1 (April 2, 2002): 461-465.

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Veteran Professor Erik Mohrmann Steps Into New Role as Dean of Faculty

Abhay Shah, Ph.D.

Assistant Professor

After completing his bachelor’s degree in Physics from Mumbai University (D. G. Ruparel College) in 2005, Dr. Abhay Shah moved to the U.S. and received his PhD in Physics at the University of Wisconsin-Milwaukee in 2011. As a graduate student, he worked on the self-force formalism that is used in modeling Extreme-Mass-Ratio Inspirals (EMRIs), two black holes inspiralling each other such that one of the black holes is roughly a hundred thousand times heavier than the other. (Such systems are located at the center of galaxies in which a stellar-mass compact object orbits a super-massive black hole. Gravitational waves emitted from EMRIs shed light on the strong-field spacetime structure of black holes, and help us understand the evolution of super-massive black holes.)

Upon completion of his PhD, Dr. Shah joined the Weizmann Institute of Science in Israel as a postdoctoral fellow from 2011 to 2013. During this time, his interests evolved into an overlap between two formalisms used to study EMRIs: the self-force formalism and the post-Newtonian theory, two different approximations of Einstein’s General Theory of Relativity. Along with his collaborators, he was able to extract very high-order linear-in-mass-ratio post-Newtonian corrections using analytical solutions, which allowed him to push the accuracy of his numerical calculations to arbitrary precision and extract analytical coefficients from numerics using experimental mathematics techniques.

From 2013 to 2017, Dr. Shah was a Research Fellow at the University of Southampton, UK. While there, he continued his work on EMRIs using the different formalisms as well as experimental mathematic techniques. He also developed an interest in black hole perturbation theory, which led him to work on finding new gauge-invariants and the equations they might satisfy.

Apart from research, Dr. Shah is passionate about teaching at both the graduate and undergraduate levels. He believes that physics, a basic requirement of all engineering and technical disciplines, is one of the many subjects that will churn students’ brain-wheels by demanding critical thinking and analytical reasoning, helping them in any career they pursue. He encourages students to be equal and active partners in the learning process. He serves as a referee for Physical Review D, Physical Review Letters, and Reviews of Modern Physics, and in his spare time pursues his interest in machine learning.

Selected Publications

Nagar, A., Shah, A., “iResum: a new paradigm for resumming gravitational wave amplitudes,” Phys. Rev. D 94, 104017 (2016) [arXiv:1606.00207 [gr-qc]].
Colleoni, M., Barack, L., Shah, A., van de Meent, M., “Self-force as a cosmic censor in the Kerr overspinning problem,” Phys. Rev. D 92, 084044 (2015) [arXiv:1508.04031 [gr-qc]].
Johnson-McDaniel, N., Shah, A., Whiting, B., “Experimental mathematics meets gravitational self-force,” Phys. Rev. D 92, 044007 (2015) [arXiv:1503.02638 [gr-qc]] (Editor’s suggestion).
Shah, A., Whiting, B., “Raising and lowering operators for spin-weighted spheroidal harmonics,” Gen Relativ Gravit (2016) 48:78 [arXiv:1503.02618 [gr-qc]].
Isoyama, S., Barack, L., Dolan, S., Le Tiec, A., Nakano, H., Shah, A., Tanaka, T., Warburton, N., “Gravitational Self-Force Correction to the Innermost Stable Circular Equatorial Orbit of a Kerr Black Hole,” Phys. Rev. Lett. 113, 161101 (2014) [arXiv:1404.6133 [gr-qc]].
Shah, Abhay, “Gravitational-wave flux for a particle orbiting a Kerr black hole to 20th post-Newtonian order: a numerical approach,” Phys. Rev. D 90, 044025 (2014) [arXiv:1403.2697 [gr-qc]].
Hergt, S., Shah, A., Schäfer, G., “Observables of a test mass along an inclined orbit in a post-Newtonian-approximated Kerr spacetime including the linear and quadratic spin terms,” Phys. Rev. Lett. 111, 021101 (2013) [arXiv:1303.6829 [gr-qc]].

Anand Thirumalai, Ph.D.

Assistant Professor

Anand Thirumalai earned his bachelor’s degree in materials engineering from the Indian Institute of Technology (IIT) in Roorkee, India. He then went on to earn a master’s degree in materials engineering from the University of British Columbia (UBC). For his master’s thesis he worked on designing and characterizing new-generation turbine blade materials, made of nickel-based superalloys.

After getting his master’s degree, he switched fields completely to follow his passion and scientific curiosity — astrophysics. For his second master’s degree at UBC, this time in astrophysics, he worked on studying the strongest magnetic fields in the known universe — those found in neutron stars — and computing the structure of atoms in such field strengths.

Later, his Ph.D. work looked at the end stages of stellar evolution. He developed a novel stellar wind model combining magnetohydrodynamics with particulate dust-dynamics and stellar rotation. His wind model is applicable to a range of stellar masses and stellar sub-types and presents a route for solving the so-called missing mass-loss mechanism problem in certain types of evolved stars.

Before coming to DigiPen, Dr. Thirumalai was also a School of Earth and Space Exploration Postdoctoral Fellow at Arizona State University. His research there involved studying winds of evolved stars as well as research in computational atomic structure. He has developed some of the fastest and most accurate atomic structure software for atoms in strong magnetic fields. He continues this research work in collaboration with researchers at UBC in Vancouver, as well as with researchers at the University of Oslo in Norway. His research these days focuses on making headway in the almost completely uncharted field of atomic and molecular structure in strong magnetic fields, as well simulations of star and planet formation. A large part of his current research focus involves harnessing the immense computing power of GPUs in astrophysical simulations.

Dr. Thirumalai teaches at all levels of the physics curriculum at DigiPen and believes in promoting diversity and inclusivity in the classroom, placing an emphasis on both teamwork as well as an interdisciplinary approach for solving modern problems using modern methods of solution.

Research website

Selected Publications

Thirumalai, A., Desch, S. J., and Young, P., “Carbon atom in intense magnetic fields,”. Physical Review A, 90, 052501 (2014).
Anand Thirumalai and Jeremy S. Heyl, “Energy levels of light atoms in strong magnetic fields,” Invited review article in Advances in Atomic, Molecular and Optical Physics, Vol. 63, Chapter 5, p. 323 (2014).
Anand Thirumalai and Jeremy S. Heyl, “Two-dimensional pseudospectral Hartree-Fock method for low-Z atoms in intense magnetic fields,” Physical Review A, 89, 052522 (2014).
Anand Thirumalai and Jeremy S. Heyl, “Is Mira a magneto-dusty rotator?” Monthly Notices of the Royal Astronomical Society, Vol. 430, p. 1359 (2013).
Anand Thirumalai and Jeremy S. Heyl, “The magnetised bellows of Betelgeuse,” Monthly Notices of the Royal Astronomical Society, Vol. 422, p. 1272 (2012).
Anand Thirumalai and Jeremy S. Heyl, “A hybrid steady-state magnetohydrodynamic dust-driven stellar wind model for AGB stars,” Monthly Notices of the Royal Astronomical Society, Volume 409, p. 1669 (2010).
Anand Thirumalai and Jeremy S. Heyl, “Hydrogen and helium atoms in strong magnetic fields,” Physical Review A, vol. 79, 012514 (2009).

Karl Voss, Ph.D.

Adjunct Professor

Dr. Karl Voss arrived in the U.S. from Germany as a Fulbright scholar, receiving his Ph.D. in Physics from the University of California, Santa Barbara. There, he amassed a list of patents and publications that he describes as “spectacularly boring.” After completing a postdoctoral position at the University of Washington, he did R&D and consulting work for a few years while also teaching at California State University, Fullerton.

Before joining DigiPen, Dr. Voss administered medical companies for over 20 years (where he used little of his physics background). In addition to his work in and contributions to the fields of optics and dermatology, he was also the physics expert for a one-season television show, The Beef, in 1996. At DigiPen, Dr. Voss is currently in charge of a single-unit physics lab.

Department Faculty

Natalia Solorzano, Ph.D.

Erik Mohrmann, Ph.D

Abhay Shah, Ph.D.

Anand Thirumalai, Ph.D.

Karl Voss, Ph.D.

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