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 

Andrey Chubukov, Artem Abanov 


YiMing Wu, ShangShun Zhang, Artem Abanov, Andrey Chubukov 


YiMing Wu, Artem Abanov, Andrey Chubukov 

Valley magnetism, nematicity, and density wave orders in twisted bilayer graphene 
Dmitry Chichinadze, Laura Classen, Andrey Chubukov 

Laura Classen, Andrey Chubukov, Carsten Honerkamp, Michael Scherer 

YiMing Wu, Artem Abanov, Yuxuan Wang, Andrey Chubukov 

Yuxuan Wang, Andrey Chubukov 

Artem Abanov, Andrey Chubukov 

Vanuildo de Carvalho, Andrey Chubukov, Rafael Fernandes 

Eliashberg theory of phononmediated superconductivity  when it is valid and how it breaks down 
Andrey Chubukov, Artem Abanov, Ilya Esterlis, Steven Kivelson 

Identification of nonFermi liquid fermionic selfenergy from quantum Monte Carlo data 
Xiao Yan Xu, Avraham Klein, Kai Sun, Andrey Chubukov, Zi Yang Meng 

Normal state properties of quantum critical metals at finite temperature 
Avraham Klein, Yoni Schattner, Erez Berg, Andrey Chubukov 

The pairing glue in cuprate superconductors from the selfenergy revealed via machine learning 
Andrey Chubukov, Jörg Schmalian 

Dynamics of ion channels via nonHermitian quantum mechanics 
Tobias Gulden, Alex Kamenev 

Plasmonic Tuning of the Near Field Heat Transfer in Double Layer Graphene 
Xuzhe Ying, Alex Kamenev  
Nature of Protected Zero Energy States in Penrose Quasicrystals 
Ezra DayRoberts, Rafael Fernandes, Alex Kamenev 

SYK Superconductivity: Quantum Kuramoto and Generalized Richardson Models 
Hanteng Wang, Alexander Chudnovskiy, Alexander Gorsky, Alex Kamenev 

Multidimensional dark space and its underlying symmetries: towards dissipationprotected qubits 
Raul Santos, Fernando Iemini, Alex Kamenev, Yuval Gefen 

Marcos Garcia, Kunio Kaneta, Yann Mambrini, Keith Olive 


The Impact of New d(p,γ)He3 Rates on Big Bang Nucleosynthesis 
TsungHan Yeh, Keith Olive, Brian Fields 

John Ellis, Jason Evans, Natsumi Nagata, Keith Olive, Liliana VelascoSevilla 


Improving Helium Abundance Determinations with Leo P as a Case Study 
Erik Aver, Danielle Berg, Keith Olive, Richard Pogge, John Salzer, Evan Skillman 

John Ellis, Marcos Garcia, Natsumi Nagata, Dimitri Nanopoulos, Keith Olive, Sarunas Verner 


John Ellis, Dimitri Nanopoulos, Keith Olive, Sarunas Verner 


Dean Lee, UlfG. Meißner, Keith Olive, Mikhail Shifman, Thomas Vonk 

Marcos Garcia, Yann Mambrini, Keith Olive, Sarunas Verner 

Marcos Garcia, Kunio Kaneta, Yann Mambrini, Keith Olive 

Phenomenology and Cosmology of NoScale Attractor Models of Inflation 
John Ellis, Dimitri Nanopoulos, Keith Olive, Sarunas Verner 

Axion Kinetic Misalignment and Parametric Resonance from Inflation 
Raymond Co, Lawrence Hall, Keisuke Harigaya, Keith Olive, Sarunas Verner 

John Ellis, Marcos Garcia, Natsumi Nagata, Dimitri Nanopoulos, Keith Olive 

Emilian Dudas, Lucien Heurtier, Yann Mambrini, Keith Olive, Mathias Pierre 

Matheus Hostert, Kunio Kaneta, Maxim Pospelov 

Cristina Mondino, Maxim Pospelov, Joshua Ruderman, Oren Slone 


A. Antognini et al. 

David McKeen 


New Constraints on Millicharged Particles from Cosmicray Production 
Ryan Plestid, Volodymyr Takhistov, YuDai Tsai, Torsten Bringmann, Alexander Kusenko, Maxim Pospelov 

Jorge Martin Camalich, Maxim Pospelov, Pham Ngoc Hoa Vuong, Robert Ziegler, Jure Zupan 

J. Albert, D. Budker, K. Chance, I.E. Gordon, F. Pedreros Bustos, M. Pospelov, S.M. Rochester, H.R. Sadeghpour 


David McKeen, Maxim Pospelov, Nirmal Raj 


Maxim Pospelov, Harikrishnan Ramani 


Novel multilepton signatures of dark sectors in light meson decays 
Matheus Hostert, Maxim Pospelov 

Gaia Lanfranchi, Maxim Pospelov, Philip Schuster 


Roni Harnik, Ryan Plestid, Maxim Pospelov, Harikrishnan Ramani 


J. Albert, D. Budker, K. Chance, I.E. Gordon, F. Pedreros Bustos, M. Pospelov, S.M. Rochester, H.R. Sadeghpour 


Edges and Endpoints in 21cm Observations from Resonant Photon Production 
Andrea Caputo, Hongwan Liu, Siddharth MishraSharma, Maxim Pospelov, Joshua Ruderman, Alfredo Urbano 

Constraints on Decaying Sterile Neutrinos from Solar Antineutrinos 
Matheus Hostert, Maxim Pospelov 

David McKeen, Maxim Pospelov, Nirmal Raj 

New limits on dark photons from solar emission and keV scale dark matter 
Haipeng An, Maxim Pospelov, Josef Pradler, Adam Ritz 

Mikhail Shifman 


Operator Product Expansion and Calculation of the TwoLoop GellMannLow Function 
Mikhail Shifman, Arkady Vainshtein 
Sov. J. Nucl. Phys. 44, 321 (1986) 
Mikhail Shifman 


String "Baryon'' in FourDimensional N = 2 Supersymmetric QCD from 2D4D Correspondence 
E. Ievlev, M. Shifman, A. Yung 

Jin Chen, ChaoHsiang Sheu, Mikhail Shifman, Gianni Tallarita, Alexei Yung 

Daniel Schubring, Mikhail Shifman 

Mikhail Shifman 

Hidden Quantum Hall Stripes in Al_{x}Ga_{1−x}As/Al_{0.24}Ga_{0.76}As Quantum Wells 
X. Fu, Yi Huang, Q. Shi, B. Shklovskii, M. Zudov, G. Gardner, M. Manfra 

Spectral rigidity of nonHermitian symmetric random matrices near Anderson transition 
Yi Huang, B. Shklovskii 

Isotropically conducting (hidden) quantum Hall stripe phases in a twodimensional electron gas 
Yi Huang, M. Sammon, M. Zudov, B. Shklovskii 