A Universal Quantum Information Preserving Photonic Switch for Scalable Quantum Networks

• URL: http://arxiv.org/abs/2604.21902v1
• Date: Thu, 23 Apr 2026 17:48:51 GMT
• Title: A Universal Quantum Information Preserving Photonic Switch for Scalable Quantum Networks
• Abstract summary: We propose the Universal Quantum Switch, a building block allowing on-demand, non-blocking, and encoding-agnostic routing of quantum information.<n>We experimentally demonstrate robust switching with $le 4%$ decoherence via thermo-optic modulation and high-speed electro-optic switching of arbitrary entangled states at 1 MHz.<n>To our knowledge, this work represents the first demonstration of multi-node dynamic entanglement distribution at these speeds.
• Score: 5.53515119748664
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum networks are a keystone of the quantum internet. However, existing implementations remain largely confined to static point-to-point links due to the absence of a switching paradigm capable of dynamically routing fragile quantum entanglement without introducing decoherence. Here, we propose the Universal Quantum Switch, a foundational building block allowing on-demand, non-blocking, and encoding-agnostic routing of quantum information, as well as seamless modality conversion between disparate quantum platforms. We develop a prototype in thin-film lithium niobate and experimentally demonstrate robust switching with $\le 4\%$ decoherence via thermo-optic modulation and high-speed electro-optic switching of arbitrary entangled states at 1 MHz. Moreover, we show that our platform can support reconfiguration speeds up to 1 GHz. To our knowledge, this work represents the first demonstration of multi-node dynamic entanglement distribution at these speeds. Complementing these experimental results, we project the architecture's scalability, showing dimension-independent decoherence, and provide a scalable, interoperable building block for heterogeneous quantum network fabrics.

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