Welcome new faculty: Asst. Professor Peter Adshead

Siv Schwink

Peter Adshead is a theoretical astrophysicist and cosmologist with a strong background in high-energy theory. In the most general terms, his research goal is to explain the physics behind why the universe looks the way it does. His research program leverages big-data observational evidence from large-scale experiments that are probing the initial conditions of the universe.

“This is an exciting time in theoretical cosmology,” remarks Adshead. “Ongoing and planned experimental observations—looking at both the temperature and polarization of the cosmic microwave background (CMB) and at complementary datasets, such as galaxy surveys—provide huge amounts of data about the statistical distribution of matter throughout the universe, enabling increasingly precise cosmological predictions. Theorists are called on to venture well beyond the simplest approximations.”

Adshead is particularly interested in persistent problems related to the inflationary epoch that lasted until just 10-36 seconds after the Big Bang.

 “The theory of inflation, in a nutshell, is a postulated period in the earliest history of our universe wherein the expansion of the universe was accelerating. While such an epoch neatly solves some of the fine-tuning issues associated with hot big-bang cosmology, the problem is that no known type of matter—whether radiation or dust—will mathematically cause the expansion of the universe to accelerate. We simply do not know what causes the primordial acceleration.

“One of the nicest aspects of inflation is that the quantum fluctuations of spacetime during this period are what we believe provide the seeds for the formation of large-scale objects, including galaxies,” explains Adshead. “Looking at the statistics of large-scale structures—considering that the galaxies are the evolved quantum fluctuations—we can directly probe the physics of what’s happening at the earliest times.”

“The microwave background experiments that measure primordial B-modes—considered the smoking gun signal of inflation—are now approaching a sensitivity level where we might be able to say something definitive about the dynamics and energy scale of inflation, which in turn will shed new light on the fundamental theory of nature,” he adds.

At Illinois, Adshead looks forward to teaching and to developing new courses. He favors a highly interactive teaching methodology that combines instruction with mentorship to foster intellectual curiosity, the free exchange of innovative ideas, and the development of strong speaking and questioning skills through regular open debates.

“My goal as an educator is not only to provide a platform for the enterprising undergraduate to learn interesting science, but also to instill in them a sense of the research process,” explains Adshead. “I believe that undergraduates can be effective in doing a properly packaged project, with clear boundaries set such that they are not overwhelmed by the need to learn a discouraging amount of prior knowledge.”

With graduate students, Adshead will emphasize the importance of effective collaboration: “I am interested in developing advanced specialty courses in cosmology, concentrating on modern aspects such as the microwave background and inflation, and emphasizing collaborative group work. Such courses are essential for bringing graduate students up to speed with the current state of the field.”

Adshead received his bachelor’s degree in mathematical physics from the University of Canterbury, New Zealand, in 2004, graduating with first-class honors. He received his master of science (2007), master of philosophy (2008) and doctoral degrees (2010) from Yale University.

At Canterbury, he was selected for a Fulbright Scholarship (2005), which he declined. At Yale, Adshead received the Dirk Brouwer Prize (2011), and the Leigh Page Prize (2005). Prior to joining the faculty at Illinois, Adshead worked as a postdoctoral fellow at the Kavli Institute for Cosmological Physics at The University of Chicago (beginning in 2010) and at the University of Cambridge (beginning in 2013).

Recent News

  • Research Funding

The United States Department of Energy awards $2.2 million to the FAIR Framework for Physics-Inspired Artificial Intelligence in High Energy Physics project, spearheaded by the National Center for Supercomputing Applications’ Center for Artificial Intelligence Innovation (CAII) and the University of Illinois at Urbana-Champaign. The primary focus of this project is to advance our understanding of the relationship between data and artificial intelligence (AI) models by exploring relationships among them through the development of FAIR (Findable, Accessible, Interoperable, and Reusable) frameworks. Using High Energy Physics (HEP) as the science driver, this project will develop a FAIR framework to advance our understanding of AI, provide new insights to apply AI techniques, and provide an environment where novel approaches to AI can be explored.

This project is an interdisciplinary, multi-department, and multi-institutional effort led by Eliu Huerta, principal investigator, director of the CAII, senior research scientist at NCSA, and faculty in Physics, Astronomy, Computational Science and Engineering and the Illinois Center for Advanced Studies of the Universe at UIUC. Alongside Huerta are co-PIs from Illinois: Zhizhen Zhao, assistant professor of Electrical & Computer Engineering and Coordinated Science Laboratory; Mark Neubauer, professor of physics, member of Illinois Center for Advanced Studies of the Universe, and faculty affiliate in ECE, NCSA, and the CAII; Volodymyr Kindratenko, co-director of the CAII, senior research scientist at NCSA, and faculty at ECE and Computer Science; Daniel S. Katz, assistant director of Scientific Software and Applications at NCSA, faculty in ECE, CS, and School of Information Sciences. In addition, the team is joined by co-PIs Roger Rusack, professor of physics at the University of Minnesota; Philip Harris, assistant professor of physics at MIT; and Javier Duarte, assistant professor in physics at UC San Diego.

  • Research

This year, 31 research teams have been awarded a combined 5.87 million node hours on the Summit supercomputer, the OLCF’s 200 petaflop IBM AC922 system. The research performed through the ALCC program this year will range from the impact of jets on offshore wind farms to the structure and states of quantum materials to the behavior of plasma within fusion reactors—all computationally intensive scientific applications necessitating the power of a large-scale supercomputer like Summit.

  • In Memoriam

Jim was widely viewed as one of the best teachers in the Physics Department. He was frequently listed in the University’s roster of excellent instructors and won awards for his classroom skills. In 2012, he received the Arnold T. Nordsieck Physics Award for Teaching Excellence for his “patient, insightful, and inspiring physics teaching, one problem at a time, that encourages undergraduate students to take their understanding to a new level.”

  • Research

Now a team of theoretical physicists at the Institute for Condensed Matter Theory (ICMT) in the Department of Physics at the University of Illinois at Urbana-Champaign, led by Illinois Physics Professor Philip Phillips, has for the first time exactly solved a representative model of the cuprate problem, the 1992 Hatsugai-Kohmoto (HK) model of a doped Mott insulator.