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Dr. Valla Fatemi, Cornell University

Inducing High Angular Momentum Spin Dynamics in a Microwave Oscillator

October 24 (Thursday), 2024
11:30 am to 12:30 pm (EDT)
Virtual via Zoom

Abstract: Quantum computing is presently in a “pre-vacuum-tube” era, with noisy devices that need error correction. But such architectures require many physical components, creating a high hardware and control overhead. Instead, a different paradigm based on individual devices, each with a high number of internal levels, has been proposed to achieve better hardware efficiency. The challenge then is how to accomplish universal control over such a multilevel system. This talk presents a new protocol for multi-level control (“matrix element modification”) in which the correspondence between control parameters and the resulting quantum dynamics of the oscillator is clear. This protocol was recently used to demonstrate high-dimensional quantum control of a harmonic oscillator, producing dynamics akin to that of a rotating top that are useful for logical quantum operations.

Biography: Dr. Fatemi received his PhD in Physics in the Jarillo-Herrero group at MIT in 2018. There he worked on electronic and quantum transport in topological insulator materials, including co-discoveries of superconductor and topological insulator states in monolayer WTe2. He then joined the Devoret group at Yale as a post-doctoral associate, researching the physics of Andreev bound states and non-equilibrium quasiparticles in superconducting devices, including the unveiling of the Andreev spin qubit. He recently joined the faculty of the School of Applied and Engineering Physics at Cornell University and is building a lab researching the physics of quantum materials, superconducting quantum circuits, and their intersections.