Math, Physics and Computation Seminar: "Watching a quantum system: How to continuously measure a superconducting qubit"
with Prof. Justin Dressel
Hosted By
Schmid College of Science and Technology
Mathematics & Physics at Schmid College
Computational Sciences at Schmid College
Title: "Watching a quantum system: How to continuously measure a superconducting qubit"
Speaker: Prof. Justin Dressel, Ph.D.
Abstract:
It has recently become experimentally possible to monitor the energy levels of a superconducting transmon qubit continuously in time using microwave fields. Such measurements weakly perturb the qubit per unit time, lead to a competition between unitary Hamiltonian dynamics and non-unitary collapse dynamics. I review several subtleties about modeling this measurement process, and discuss several recent achievements made in collaboration with the Siddiqi laboratory at UC Berkeley. Topics include simultaneous measurements of multiple non-commuting observables, the active use of the quantum Zeno effect with a moving measurement basis for qubit control, and subtle aspects about the information content contained in the collected stochastic readout.
Bio:
Justin Dressel received his Ph.D. in quantum physics from U Rochester in 2013, was a visiting researcher at RIKEN Wako-shi in Saitama, Japan in 2013, and was a postdoctoral scholar at UC Riverside between 2013-2015, after which he started as an Assistant Professor in Physics and Computational Science at Chapman University. He researches quantum information, computing, and foundations, which is a natural intersection point between physics, mathematics, and computer science. His recent research has focused on algebraic approaches to generalized quantum measurements, quantum computation with superconducting transmon quantum bits using circuit quantum electrodynamics, and Clifford algebraic approaches to relativistic field theory. Though the bulk of his work is theoretical in nature, he works closely with experimental teams whenever possible.
You can contact the event organizer, at dressel@chapman.edu.
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