Cosmin is a senior majoring in Physics with certificates in Applied Mathematics and Applications of Computing. His research is about quasiparticle-induced... Read more about Cosmin Andrei
A.B Physics, University of California, Berkeley (2018)
Jake is a fourth year graduate student from Wilmington NC and completed his bachelors at the University of California, Berkeley majoring in physics....
Ph.D Physics, MIT (2018) B.A Physics, Princeton University (2012)
Cody completed his senior thesis in our group, looking at tunable coupling in 3D cavities. He often sports a snazzy briefcase. He currently works as an AMO... Read more about William Cody Burton
Ph.D. 2019, Physics, Harvard B.S. 2013, Physics and Applied Math, MIT
Christie is a Princeton Materials Science Postdoctoral Fellow exploring novel lattice geometries to study condensed matter systems with superconducting... Read more about Christie Chiu
B.S. Engineering Physics & B.A. Economics, Stanford University (2021)
Jeremiah is a first year graduate student working on fabricating novel junctions, such as quantum phase slip wires, for new protected qubits. He is from Los... Read more about Jeremiah Coleman
Xanthe is a Dicke Fellow originally from Australia. Her current research is focussed on protected superconducting qubits. She completed her PhD at the... Read more about Xanthe Croot
B.S. Physics, University of California, San Diego (2016)
Kevin is a fourth year graduate student from San Rafael, CA. He received his B.S. in Physics from the University of California, San Diego, and is currently... Read more about Kevin D Crowley
Ph.D Electrical Engineering, Princeton University (2019) B.A Physics Middlebury College (2013)
Mattias hails from the great state of Oregon and is a graduate of Middlebury College. He became a member of the lab in 2013 and worked on nonequilibrium phase... Read more about Mattias Fitzpatrick
Youqi is a senior majoring in Electrical Engineering with certificates in Engineering Physics and Applications of Computing. She explores ways to tune... Read more about Youqi Gang
Charlie is a third year grad student from Fort Wayne, Indiana and got his bachelors in applied physics at Purdue University. He works on engineering novel... Read more about Charlie Guinn
The origin of many quantum-material phenomena is intimately related to the presence of flat electronic bands. In quantum simulation, such bands have been realized through line-graph lattices, a class of lattices known to exhibit flat bands. Based on that work, we conduct a high-throughput screening for line-graph lattices among the crystalline structures of the Materials Flatband Database and report on new candidates for line-graph materials and lattice models. In particular, we find materials with line-graph-lattice structures beyond the two most commonly known examples, the kagomé and pyrochlore lattices. We also identify materials which may exhibit flat topological bands. Finally, we examine the various line-graph lattices detected and highlight those with gapped flat bands and those most frequently represented among this set of materials. With the identification of real stoichiometric materials and theoretical lattice geometries, the results of this work may inform future studies of flat-band many-body physics in both condensed matter experiment and theory.
The geometric properties of a lattice can have profound consequences on its band spectrum. For example, symmetry constraints and geometric frustration can give rise to topologicially nontrivial and dispersionless bands, respectively. Line-graph lattices are a perfect example of both of these features: Their lowest energy bands are perfectly flat, and here we develop a formalism to connect some of their geometric properties with the presence or absence of fragile topology in their flat bands. This theoretical work will enable experimental studies of fragile topology in several types of line-graph lattices, most naturally suited to superconducting circuits.
