Universal monitored dynamics in multimode bosonic systems
Abstract
We propose a route to study monitored many-body dynamics in multimode bosonic systems using circuit quantum electrodynamics. In this experimental setting, we construct several bosonic models comprising brickwork circuits built from beam-splitter gates, local parity measurements, and optional on-site Hubbard interactions, and diagnose their monitored dynamics via ancilla purification and a learnability-based probe. Under parity measurements, generic gate sets exhibit behavior that is largely consistent with a conventional measurement-induced phase transition, while a special class of beam-splitter circuits shows an apparent critical-like high-measurement regime in which purification times scale linearly with system size. We show that for realistic noise, gate, and measurement rates, these signatures are observable with near-term circuit QED hardware.
Keywords
Cite
@article{arxiv.2603.13125,
title = {Universal monitored dynamics in multimode bosonic systems},
author = {Shivam Patel and Catherine McCarthy and Ahana Chakraborty and Jordan Huang and Thomas J. DiNapoli and Romain Vasseur and J. H. Pixley and Srivatsan Chakram},
journal= {arXiv preprint arXiv:2603.13125},
year = {2026}
}