Quantum Circuits
& Materials.
Theory of Quantum Circuits & Materials
We are a theoretical research group at LSU working at the exciting intersection of superconducting quantum devices and quantum materials. Our overarching goal is to pioneer new applications of quantum circuits and materials for superconducting quantum information devices and information processing. Our current research interests in pursuit of this goal include the development of novel superconducting qubit designs with inbuilt error-protection, the development of high-fidelity quantum gate protocols, and the use of quantum materials for the design of highly-tunable quantum-limited parametric amplifiers. We also closely collaborate with multiple experimental research laboratories in the United States and in Europe.
Constantin Schrade
Constantin Schrade is an Assistant Professor (Tenure-Track) in the Department of Physics and Astronomy at the Louisiana State University (LSU) and the Principal Investigator of the “Theory of Quantum Circuits & Materials” group. Until the end of 2023, he held the position of a Research Assistant Professor in Quantum Information Science and Quantum Condensed Matter Physics at the Niels Bohr Institute in Copenhagen. Here, he was a member of the Center for Quantum Devices (QDev) and worked in close collaboration with several experimental groups on creating error-protected superconducting qubits and quantum coherent devices. Prior to joining the Niels Bohr Institute, Constantin Schrade was a postdoctoral researcher for three years (2017-2020) at the Department of Physics and the Material Research Laboratory (MRL) at the Massachusetts Institute of Technology (MIT). Under the supervision of Professor Liang Fu and Dr. Jagadeesh Moodera, his research at MIT focused on superconducting quantum information devices and novel quantum materials. Constantin Schrade obtained his Ph.D. (2017) under the supervision of Professor Daniel Loss at the University of Basel, where he conducted research on spin-based and topological quantum information processing. Before pursuing his doctorate, he earned his Master’s and Bachelor’s degrees from ETH Zurich in Switzerland. Beyond his academic pursuits, Constantin has a keen interest in outdoor activities.
We are looking for additional members!
Selected Publications
Charge-4e supercurrrent in an InAs-Al superconductor-semiconductor heterostructures
Carlo Ciaccia, Roy Haller, Asbjorn C. C. Drachmann, Tyler Lindemann, Michael J. Manfra, Constantin Schrade, Christian Schönenberger
arXiv:2306.05467 (2023)
Josephson diode effect in supercurrent interferometers
Ruben Seoane Souto, Martin Leijnse, and Constantin Schrade.
Phys. Rev. Lett. 129 267702 (2022)
Entangling transmons with low-frequency protected superconducting qubits
Andrea Maiani, Morten Kjaergaard, and Constantin Schrade
PRX Quantum, 030329 (2022)
Protected hybrid superconducting qubit in an array of gate-tunable Josephson interferometers
Constantin Schrade, Charles M. Marcus, and András Gyenis.
PRX Quantum 3, 030303 (2022)
Quantum Computing with Majorana Kramers Pairs
Constantin Schrade and Liang Fu.
Phys. Rev. Lett 129, 227002 (2022)
Majorana Superconducting Qubit
Constantin Schrade and Liang Fu.
Phys. Rev. Lett 121, 267002 (2018)
Parity-controlled 2π Josephson effect mediated by Majorana Kramers pairs
Constantin Schrade and Liang Fu.
Phys. Rev. Lett. 120, 267002 (2018)
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Featured News
Welcome to Rahul Devarakonda!
New group member! Rahul Devarakonda is joining the group to …
Invited Talk at March Meeting 2023
Check out the recording of Constantin’s Invited Talk at the …
New Preprint with Fatemi Lab
Together with the Fatemi Lab at Cornell University, we are …