Author

Xinan Chen

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Preprint Oct 2026

Universal Improvement of Channel Fidelity via Entanglement Assistance

Communication using quantum channels generally requires encoding and decoding on many identical uses of a quantum channel. In practical settings, decoherence may severely limit our ability to do so, potentially rendering each channel use nonidentical. Given $n$ nonidentical channels, we present an entanglement-assisted...

Xi-Nan Chen, Eric Chitambar · 0 citations

Preprint Jul 2026

Entanglement Distillation and Swapping Scheduling in Quantum Repeaters with Noisy Memories

Analysis of entanglement distillation and entanglement swapping at the level of the elementary building blocks of noisy quantum repeater networks provides instructive insights into the link-level principles that govern larger-scale architectures.

S. Chander, Xi-Nan Chen, Allen Zang · 0 citations

Preprint Jul 2026

Enhancing Entanglement Purification with Shared Randomness

It is proved that accumulating and shuffling improves the expected success probability and the success-weighted output Bell fidelity over the baseline without accumulating and shuffling, for every finite number of accumulation rounds and in the asymptotic limit.

Allen Zang, Bi-Kun Li, Xi-Nan Chen et al. · 1 citation