Entanglement swapping via lossy channels using photon-number-encoded states
arxiv(2024)
摘要
Entanglement shared between distant parties is a key resource in quantum
networks. However, photon losses in quantum channels significantly reduce the
success probability of entanglement sharing, which scales quadratically with
the channel transmission. Quantum repeaters using entanglement swapping can
mitigate this effect, but usually require high-performance photonic quantum
memories to synchronize photonic qubits. In this work, we theoretically and
experimentally investigate an entanglement swapping protocol using
photon-number-encoded states that can effectively alleviate quantum channel
losses without requiring photonic quantum memories. We demonstrate that the
protocol exhibits a success probability scaling linearly with the channel
transmission. Furthermore, we show that while unbalanced channel losses can
degrade the shared entanglement, this effect can be compensated by optimally
adjusting the initial entangled states. Our results highlight the potential of
photon-number encoding for realizing robust entanglement distribution in lossy
quantum networks.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要