IQC Colloquium featuring Machiel Blok

Beyond Binary Quantum Information in Superconducting Circuits: Taking the Transmon for a Spin

Machiel Blok | University of Rochester

Encoding quantum information in the many-level systems provides a resource efficient path towards quantum computing-, and simulation. Here I will discuss ongoing work in our lab at the University of Rochester to explore excited states in superconducting circuits. We demonstrate preparation and readout of Fock states of up to eleven microwave photons in a transmon circuit[1].

Furthermore, we illustrate how we can efficiently control this high-dimensional system using spin-displacement operations that correspond to rotations of large-angular moment spins[2]. In the long term, we anticipate this new approach to controlling higher-level quantum information to yield benefits for bosonic quantum error correction and qu-dit simulation.

[1] Systematic Study of High Ej/Ec transmon qudits up to d=12 Z. Wang et al arXiv:2407.17407 (2024)

[2] Multi-frequency control and measurement of a spin-7/2 system encoded in a transmon qudit E. Chamion et al arXiv:2405.15857 (2024)

Location

• QNC 0101