Changhun Oh

Optical estimation of unitary Gaussian processes without phase reference using Fock states

2020 · New Journal of Physics

Abstract Since a general Gaussian process is phase-sensitive, a stable phase reference is required to take advantage of this feature. When the reference is missing, either due to the volatile nature of the measured sample …

Universal Spreading of Conditional Mutual Information in Noisy Random Circuits

2024 · arXiv (Cornell University)

We study the evolution of conditional mutual information in generic open quantum systems, focusing on one-dimensional random circuits with interspersed local noise. Unlike in noiseless circuits, where conditional mutual information spreads linearly while being bounded …