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Creation of Entangled Photonic States Using Linear Optics

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arxiv 2106.13825 v1 pith:Z6D2BT3N submitted 2021-06-25 quant-ph

classification quant-ph
keywords bellentangledlinearphotonicstatestatescreationdual-rail
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Using only linear optical elements, the creation of dual-rail photonic entangled states is inherently probabilistic. Known entanglement generation schemes have low success probabilities, requiring large-scale multiplexing to achieve near-deterministic operation of quantum information processing protocols. In this paper, we introduce multiple techniques and methods to generate photonic entangled states with high probability, which have the potential to reduce the footprint of Linear Optical Quantum Computing (LOQC) architectures drastically. Most notably, we are showing how to improve Bell state preparation from four single photons to up to p=2/3, boost Type-I fusion to 75% with a dual-rail Bell state ancilla and improve Type-II fusion beyond the limits of Bell state discrimination.

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Cited by 6 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. OpenAlex reports about 18 citations worldwide. Full citation record

  1. Single-photon-boosted type-I fusion gates

    quant-ph 2026-03 unverdicted novelty 7.0 of 10

    A type-I fusion gate, boosted with four single-photon ancillas and passive linear optics, reaches 3/4 success probability via a distillation protocol.

  2. Finding trail covers: near-optimal decompositions of graph states as linear fusion networks

    quant-ph 2025-08 conditional novelty 7.0 of 10

    The fusion-minimization problem for photonic graph states is formalized as minimum trail cover; most bounded variants are NP-hard, but heuristics plus a TSP reduction give near-optimal fusion counts in benchmarks.

  3. Adaptive Framework for Failure-Aware Protocols in Fusion-Based Graph-State Generation

    quant-ph 2026-01 conditional novelty 6.0 of 10

    Adaptive reuse of partially built graph states after failed fusion measurements, combined with graph-theoretic ordering, can cut expected fusion overhead by orders of magnitude relative to repeat-until-success.

  4. Heralded generation of a three-mode NOON state

    quant-ph 2025-12 conditional novelty 6.0 of 10

    A linear-optical circuit converts three single photons into a heralded three-mode two-photon NOON state with fidelity 0.823±0.018 and certified genuine tripartite entanglement.

  5. A vapor-cavity-QED system for quantum computation and communication

    quant-ph 2025-09 conditional novelty 6.0 of 10

    A theoretical proposal shows that warm atoms transiting high-cooperativity microcavities can generate, absorb, and gate single photons with fidelities around 0.96-0.99 in modeled parameter regimes.

  6. Limits of heralded photonic Bell-state generation in the presence of loss

    quant-ph 2026-08 conditional novelty 4.0 of 10

    A comparative simulation study finds that higher-photon-number interference schemes are more loss-robust, but which heralded Bell-state scheme wins depends on the dominant error source and the implementation architecture.

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