Research
Research at FTPI includes the major areas of theoretical physics: Particle Physics, Astrophysics and Cosmology, and Condensed Matter and Biophysics
In addition to supporting the faculty, postdoctoral researchers, and graduate students involved in this research at the Institute, FTPI also hosts shortterm and longterm visitors and organizes workshops on topics of acute interest in the major areas of study.
High Energy Theory & Particle Astrophysics
The High Energy Theory Group focuses on understand the fundamental forces of nature and cosmology. The unification of the electromagnetic and weak nuclear force is well understood and is continually being tested experimentally. Among the objectives of the group in Minnesota is to push our understanding beyond the Standard Model of electroweak interactions. The strong nuclear force is inherently more complicated and understand the nature of strongly interacting systems is another major objective of the group.
Particle Astrophysics and Cosmology is another aspect of High Energy theory as the Universe provides a laboratory for studying particle interactions at energies much higher than can be achieved experimentally. Topics which are actively pursued include, inflation, the baryon asymmetry, dark matter, nucleosynthesis and large scale structure.
Condensed Matter Theory
As condensed matter theorists, one of our main goals is to understand how the microscopic behavior of a very large number of atoms or molecules is related to the macroscopic properties of solids and liquids. While this certainly applies to objects common in our daily lives, such as kitchen salt or water, we are also interested in quantum versions of solids, liquids, and gases. For example, the properties of many metals are well described in terms of a gas of nearly independent electrons, whereas in other systems the electronelectron interaction is so significant that they behave as strongly correlated quantum liquids.
At first sight, the problem may seem deceivingly straightforward, after all, the ions and electrons forming the atoms only talk to each other via the good old electrostatic repulsion. However, it turns out that the quantummechanical collective behavior of condensed matter systems is often very different than just the simple sum of its constituents. This phenomenon, called emergence, is behind many unique and fascinating properties, among which superconductivity is perhaps the best known.
Condensed matter theory is a very broad area, that ranges from concrete applications to more abstract models. At the University of Minnesota, we have a vibrant condensed matter theory group working on a diverse set of topics, such as quantum materials, superconductivity, liquid crystals, quantum magnets, topological quantum matter, disordered systems, and nonequilibrium physics. We also enjoy frequent collaborations with the condensed matter experimental group, creating an engaging atmosphere to perform research in this field.
Recent Publications
Title 
Authors 
Journal 

Haipeng An, Haoming Nie, Maxim Pospelov, Josef Pradler, Adam Ritz 


Yohei Ema, Ting Gao, Maxim Pospelov 


Smoke and Mirrors: Neutron Star Internal Heating Constraints on Mirror Matter 
David McKeen, Maxim Pospelov, Nirmal Raj 

Samer Afach et. al. (Pospelov) 


Prateek Agrawal et. al. (Pospelov) 


Terrestrial Probes of Electromagnetically Interacting Dark Radiation 
JuiLin Kuo, Maxim Pospelov, Josef Pradler 

David McKeen, Maxim Pospelov, Nirmal Raj 

Yann Mambrini, Keith Olive 

Yi Huang, Boris Shklovskii 

MetalInsulator Transition in ntype Bulk Crystals and Films of Strongly Compensated SrTiO_{3} 
Yi Huang, Y. Ayino, Boris Shklovskii 

John Ellis, Jason Evans, Natsumi Nagata, Dimitri Nanopoulos, Keith Olive 


Keith Olive 


Yi Huang, Boris Shklovskii 

John Ellis, Jason Evans, Natsumi Nagata, Keith Olive 

Emilian Dudas, Marcos Garcia, Yann Mambrini, Keith Olive, Marco Peloso, Sarunas Verner 

Marcos Garcia, Yann Mambrini, Keith Olive, Sarunas Verner 


Erik Aver et. al. (Olive) 


Onedimensional Scattering of Twodimensional Fermions Near Quantum Criticality 
Dimitri Pimenov, Alex Kamenev, Andrey Chubukov 

Dimitri Pimenov, Alex Kamenev, Andrey Chubukov 


YiMing Wu, ShangShun Zhang, Artem Abanov, Andrey Chubukov 

Pseudogap and Superconductivity Emerging from Quantum Magnetic Fluctuations: a Monte Carlo Study 
Weilun Jiang, Yuzhi Liu, Avraham Klein, Yuxuan Wang, Kai Sun, Andrey Chubukov, Zi Yang, Meng 

The Dynamical Exponent of a Quantum Critical Itinerant Ferromagnet: a Monte Carlo Study 
Yuzhi Liu, Weilun Jiang, Avraham Klein, Yuxuan Wang, Kai Sun, Andrey Chubukov, Zi Yang, Meng 

Specific Heat and the Gap Structure of a Nematic Superconductor, Application to FeSe 
Kazi Ranjibul Islam, Jakob Böker, Ilya Eremin, Andrey Chubukov 

Morten Christensen, Andrey Chubukov 


ShangShun Zhang, YiMing Wu, Artem Abanov, Andrey Chubukov 


SU(4) Symmetry in Twisted Bilayer Graphene  An Itinerant Perspective 
Dmitry Chichinadze, Laura Classen, Yuxuan Wang, Andrey Chubukov 

Mikhail Shifman 

Treating Divergent Perturbation Theory: Lessons from Exactly Solvable 2D Models at Large N 
Daniel Schubring, ChaoHsiang Sheu, Mikhail Shifman 

YangMills at Strong vs. Weak Coupling: Renormalons, OPE And All That 
Mikhail Shifman 























































































