Rate-Fidelity Tradeoffs in All-Photonic and Memory-Equipped Quantum Switches
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866911481580224512 |
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| author | Promponas, Panagiotis Bacciottini, Leonardo Polakos, Paul Vardoyan, Gayane Towsley, Don Tassiulas, Leandros |
| author_facet | Promponas, Panagiotis Bacciottini, Leonardo Polakos, Paul Vardoyan, Gayane Towsley, Don Tassiulas, Leandros |
| contents | Quantum entanglement switches are a key building block for early quantum networks, and a central design question is whether near-term devices should use only flying photons or also incorporate quantum memories. We compare two architectures: an all-photonic entanglement generation switch (EGS) that repeatedly attempts Bell-state measurements (BSM) without storing qubits, and a quantum memory-equipped switch that buffers entanglement and triggers measurements only when heralded connectivity is available (herald-then-swap control). These two designs trade off simple, memoryless operation that avoids decoherence and memory-induced latency against heralding-based control that buffers entanglement to use BSMs more efficiently. We formalize both models under a common hardware abstraction and characterize their achievable rate-fidelity regions, yielding a benchmarking methodology that translates hardware and protocol parameters into network-level performance. Numerical evaluation quantifies the rate-fidelity tradeoffs of both models, identifies operating regions in which each architecture dominates, and shows how hardware and protocol knobs can be tuned to meet application-specific targets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_02610 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Rate-Fidelity Tradeoffs in All-Photonic and Memory-Equipped Quantum Switches Promponas, Panagiotis Bacciottini, Leonardo Polakos, Paul Vardoyan, Gayane Towsley, Don Tassiulas, Leandros Quantum Physics Networking and Internet Architecture Quantum entanglement switches are a key building block for early quantum networks, and a central design question is whether near-term devices should use only flying photons or also incorporate quantum memories. We compare two architectures: an all-photonic entanglement generation switch (EGS) that repeatedly attempts Bell-state measurements (BSM) without storing qubits, and a quantum memory-equipped switch that buffers entanglement and triggers measurements only when heralded connectivity is available (herald-then-swap control). These two designs trade off simple, memoryless operation that avoids decoherence and memory-induced latency against heralding-based control that buffers entanglement to use BSMs more efficiently. We formalize both models under a common hardware abstraction and characterize their achievable rate-fidelity regions, yielding a benchmarking methodology that translates hardware and protocol parameters into network-level performance. Numerical evaluation quantifies the rate-fidelity tradeoffs of both models, identifies operating regions in which each architecture dominates, and shows how hardware and protocol knobs can be tuned to meet application-specific targets. |
| title | Rate-Fidelity Tradeoffs in All-Photonic and Memory-Equipped Quantum Switches |
| topic | Quantum Physics Networking and Internet Architecture |
| url | https://arxiv.org/abs/2603.02610 |