Leif Grönberg

Qubit Measurement by Multichannel Driving

2018 · arXiv (Cornell University)

We theoretically propose and experimentally implement a method of measuring a qubit by driving it close to the frequency of a dispersively coupled bosonic mode. The separation of the bosonic states corresponding to different qubit …

Broadband continuous variable entanglement generation using Kerr-free Josephson metamaterial

2021 · arXiv (Cornell University)

Entangled microwave photons form a fundamental resource for quantum information processing and sensing with continuous variables. We use a low-loss Josephson metamaterial comprising superconducting, non-linear, asymmetric inductive elements to generate frequency-entangled photons from vacuum fluctuations …