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
Zhaoqi Leng joined the lab in 2015. He worked on creating and stabilizing entanglement in circuit QED systems. He is researching new optimization/machine... Read more about Zhaoqi Leng
Master of Science in Physics from Indian Institute of Science (IISc) [2016] Bachelor of Science (Research) in Physics with Distinction from Indian Institute of Science (IISc) [2015]
Pranav hails from Nasik, the wine capital of India, but he does not know his wines. On finding a problem interesting and impactful enough, he does not hesitate... Read more about Pranav Mundada
Srikanth Srinivasan was brave enough to be the first graduate student in the Houck Lab. While he was a graduate student, he worked on both the tunable coupling... Read more about Srikanth Srinivasan
Neereja became a member of the lab in the spring of 2013. She studied the ultra-low frequency regime in circuit QED and explored the interactions that arise... Read more about Neereja Sundaresan
Ph.D. Princeton University B.S Physics and Mathematics University of Wisconsin- River Falls
Devin Underwood works on arrays of cQED elements for purposes of studying condensed matter physics with photons. He hales from frosty Alaska, and is known for... Read more about Devin Underwood
Andrei joined the HouckLab in 2015 after finishing his undergraduate studies at University College London. His work has been focused on engineering photon... Read more about Andrei Vrajitoarea
Ph.D Electrical Engineering, Princeton University (2018) M.S Electrical Engineering, Tsinghua University (2011) B.S Electrical Engineering, Tsinghua University (2008)
Gengyan became a member of the Houck Lab in 2011 after receiving his bachelor's and master's degree from Tsinghua University. Known in the group as the fab... Read more about Gengyan Zhang
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.
