研究目的
To propose an alignment-free two-party polarization-entanglement transmission scheme for entangled photons that is robust against random channel noise and the instability of reference frames, without the need for ancillary photons or calibrated reference frames.
研究成果
The proposed alignment-free protocols for transmitting polarization-entangled photons effectively suppress infidelity from channel noise and reference frame misalignment. The protocols, utilizing simple linear-optical elements and active Pockels cells, offer a practical solution for long-distance quantum communication and distributed quantum networks, with the potential for high fidelity and efficiency.
研究不足
The success probability of the transmission with passive linear optical elements is dependent on the misalignment angle, which can decrease efficiency. Although active polarization modulators can, in principle, improve efficiency to unity, realistic PCs may cause photon losses due to finite transmission efficiency.
