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Seminar: Beyond Binary Quantum Information
6 November 2023
Assistant Professor Machiel Blok University of Rochester, USA visits UCL.
HOST:听Prof. John Morton
SPEAKER: 听| Assistant Professor听|听University of Rochester, USA
TIME & VENUE: Tuesday | 21 November 2023听| 1:00 PM |听Medawar Building, Lankester Lecture Theatre G01
TITLE: Beyond Binary Quantum Information: Controlling Multi-Level Artificial Atoms in Superconducting Circuits
ABSTRACT: Encoding quantum information in the higher energy levels of the transmon circuit provides a resource efficient way to control large Hilbert spaces and to execute quantum algorithms at reduced circuit complexity. Building on recent demonstrations of the first 鈥榪utrit quantum processor鈥� at UC Berkeley [1,2], here I will discuss our ongoing work at the University of Rochester to explore the transmon spectrum. We demonstrate preparation and readout of Fock states of up to seven microwave photons. Furthermore, we illustrate how the strong Kerr non-linearity of the transmon allows us to implement non-Gaussian operations that are challenging to realise in a linear mode. Finally, we will discuss the prospects of this new platform for bosonic quantum error correction and qubit simulation.
[1] Quantum Information Scrambling in a Superconducting Qutrit Processor听M. S. Blok et al PRX听 11, (2) 021010 (2021).
[2] Qutrit Randomized Benchmarking听A. Morvan et al PRL 126 (21), 210504 (2021).