Guang-Can Guo

TL;DR: Wang et al. as discussed by the authors showed that the general practical attacking schemes can be divided into the Trojan horse attack, strong randomness attack and weak randomness attacks respectively, and they proved security of BB84 protocol under randomness attacking models, and these results can be applied to guarantee the security of the practical quantum key distribution system.

TL;DR: In this paper, an approach of magnetic-free non-reciprocity by optically-induced magnetization in an atom ensemble was proposed and shown to achieve excellent isolation over a power dynamic range of 7 orders of magnitude, with the noiseless property verified by quantum statistics measurements.

TL;DR: In this article, a probabilistic quantum machine realized superposition of two arbitrary unknown photonic qubits as long as they have nonzero overlaps with the horizontal polarization state $|H\ensuremath{rangle}$.

TL;DR: In this paper, the authors proposed a robust, fast, and efficient photonic OAM switch device based on a topological process, where photons are adiabatically pumped to a target OAM state on demand.

TL;DR: In this paper, the authors present experimental results pertaining to the realization of optical isolators and circulators with a cross-Kerr nonlinearity achieved with a medium comprising a thermal vapor of N-type atoms.