IFIMAC+ICMM Joint Seminar Series focuses on cutting-edge research on condensed matter physics, bringing European speakers to our Cantoblanco Campus, this year via Zoom. You need to be subscribed to our mailing list at the link provided below to get the links to the seminar room. https://listas-correo.uam.es/sympa/subscribe/seminarios-ifimac-icmm-l.

Catching the quantum butterfly: Thermalization and information scrambling on a 53-qubit quantum processor

Xiao Mi, Google Research, Santa Barbara, USA

12:00 CEST, May 6, 2021


Over the past decade, rapid progress in quantum engineering has allowed full fabrication and control of superconducting quantum processors with over 50 qubits and full planar connectivity, as exemplified by Google’s Sycamore processor. Using random circuits carefully designed to randomly explore the immense Hilbert space with 10^16 dimensions, a bit-string sampling task that proves difficult for classical computation has been recently demonstrated on Sycamore. In this presentation, I will first detail the formulation and execution of the original “quantum supremacy” experiment. I will then describe current works being done in our group, with a particular emphasis on the efforts to discover useful quantum computing applications in the Noisy Intermediate-Scale Quantum (NISQ) era. As an example, I will present preliminary experimental results on using Sycamore to study the physics of information scrambling and thermalization in quantum circuits that are challenging to analyze or simulate classically.