Universal monitored dynamics in multimode bosonic systems

• URL: http://arxiv.org/abs/2603.13125v1
• Date: Fri, 13 Mar 2026 16:17:43 GMT
• Title: Universal monitored dynamics in multimode bosonic systems
• Abstract summary: We propose a route to study monitored many-body dynamics in bosonic systems using circuit quantum electrodynamics.<n>We construct several bosonic models comprising brickwork circuits built from beam-splitter gates, local parity measurements, and optional on-site Hubbard interactions.<n>For realistic noise, gate, and measurement rates, these signatures are observable with near-term circuit QED hardware.
• Score: 0.9368753183086049
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• 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.

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