Quantum

Boosted Entanglement Swapping

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 05/11/2026, 05:13:24 UTC.

Briefings

A 2026 arXiv preprint reports boosted entanglement swapping using ancilla-assisted linear optics, achieving a 62.5% success probability and 76.6% fidelity. The study uses 1550 nm photons and identifies all four Bell states, enabling efficient entanglement distribution for quantum repeaters and potentially fusion-based quantum computing. The acceptance rate is measured at 69.39% with a standard error of 0.39%.

Key points

• Ancilla-assisted linear optics boost entanglement swapping success probability from 50% to 62.5%.
• All four Bell states are successfully identified in the experiment.

Context

This research addresses the fundamental limitation of linear-optical Bell-state measurements, which caps success probability at 50%. The new protocol overcomes this by using ancilla photons to enhance the measurement efficiency, a critical advancement for practical quantum networks and fusion quantum computing applications.

Limitations

The study relies on a single preprint version (arXiv:2611.05497v1) from November 2026. The reported acceptance rate and fidelity are measured values, not forecasts. The specific experimental setup details beyond the 1550 nm wavelength and ancilla-assisted method are limited to the abstract summary.

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