Time: Thursday, September 26, 2024, 16:00
Location: Civil Engineering Building (B23), Lecture Hall B (https://esviewer.tudelft.nl/space/29/)
Who: Prof. Markus Müller, RWTH Aachen University and Forschungszentrum Jülich, Germany

To date, the construction of scalable fault-tolerant quantum computers remains a fundamental scientific and technological challenge. In my talk, I will first introduce basic concepts of fault-tolerant error correction, which allows one to protect quantum information by redundant encoding of quantum information in logical qubits formed of multiple physical qubits. I will then discuss recent progress, based on new theory concepts and collaborative experimental breakthroughs in state-of-the-art physical quantum processors, including trapped ions, Rydberg atoms and superconducting qubits. Specifically, I will present new fault-tolerance preserving protocols for autonomous quantum error correction, which do not require in-sequence measurements of qubits, which are often slow or technically challenging in many state-of-the-art physical quantum processor platforms. I will also show how quantum cellular automata can be designed to give rise to emergent many-body dynamics with quantum error-correcting capabilities. Towards universal fault-tolerant quantum computing with logical qubits – eventually outperforming computations on physical qubits – I will present new protocols and first experimental demonstrations of fault-tolerant code switching. These results mark exciting first steps into the era of early fault-tolerant quantum computing with logical qubits.

Host: Leo DiCarlo