Adaptive Time-Reversal Symmetry Breaking for Robust Multi-Photon Adaptive Quantum State Routing Under Realistic Decay and Disorder

Reliable transport of multi-photon states is essential for scalable photonic quantum networks, yet conventional approaches typically rely on static time-reversal-symmetry breaking (TRSB) to introduce a fixed directional bias. However, static TRSB provides only limited control in realistic devices, where radiative decay and random onsite disorder disrupt transport and prevent high-fidelity routing. This project explores whether time-dependent TRSB phases can provide a more adaptive mechanism for directing quantum states. We modeled a four-site open photonic chain in which a two-photon excitation initialized at site 0 must be delivered to site 3 under realistic decay (κ = 0.02) and disorder. We hypothesized that a dynamically modulated TRSB phase ϕ(t), rather than a static value, could generate directed transport and suppress disorder-induced backflow. We used CMA-ES optimization, and the system learned a six-segment ϕ(t) protocol directly from physical feedback. The resulting adaptive control achieved a mean transfer fidelity of 0.705 (70.5%), more than doubling the static TRSB baseline of 0.306 (30.6%) across held-out disorder samples. Training curves showed stable convergence, and analysis revealed that the learned ϕ(t) constructs a time-ordered chiral bias that actively compensates for disorder and decay. These results provide the first demonstration that adaptive, time-dependent TRSB can act as a high-performance adaptive quantum state router for multi-photon excitations, opening new possibilities for programmable photonic links, reconfigurable quantum interconnects, and resilient components in future quantum communication architectures. Supplementary Material File (iris_final_draft (10).pdf) - Download - 737.19 KB Information & Authors Information Version history Copyright This work is licensed under a Non Exclusive No Reuse License.

- adaptive control systems - adaptive robust control - model reference adaptive control systems - quantum optimization, harmonic countermodulation, entangled hamiltonians, squeezed state encoding, adaptive quantum measurement - time-dependent time-reversal symmetry breaking adaptive quantum control multi-photon state routing open quantum systems disorder-robust photonic transport Authors Metrics & Citations Metrics Article Usage 253views 128downloads Citations Download citation Aditya Yadav. Adaptive Time-Reversal Symmetry Breaking for Robust Multi-Photon Adaptive Quantum State Routing Under Realistic Decay and Disorder. Authorea. 15 December 2025. DOI: https://doi.org/10.22541/au.176583123.36939872/v1 DOI: https://doi.org/10.22541/au.176583123.36939872/v1 If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download. For more information or tips please see 'Downloading to a citation manager' in the Help menu.