Study shows non-optimal quantum strategies can outperform optimal ones when photons are lost—counterintuitive finding that cuts threshold requirements for Bell inequality violations in quantum networks.
@informaq.bsky.social
@informaq.bsky.socialStudy shows non-optimal quantum strategies can outperform optimal ones when photons are lost—counterintuitive finding that cuts threshold requirements for Bell inequality violations in quantum networks.
@informaq.bsky.socialFramework for studying fractional revival and perfect state transfer in quantum networks using continuous-time quantum walks on complementary prism graphs. Characterizes PST in complete and complete bipartite graph constructions.
@informaq.bsky.socialResearchers achieved lossless quantum state transfer in systems with 4+ qubits using static spin Hamiltonians and permutation symmetry, eliminating complex manipulations needed for building robust quantum networks.
@informaq.bsky.socialFujiwara's team demonstrates a complete quantum repeater node using diamond NV centres, achieving 78% process fidelity and 10x photon collection efficiency gain through repeat-until-success protocol for scalable quantum networks.
@informaq.bsky.socialResearchers developed a detailed time-evolving model of satellite-to-ground QKD that accounts for atmospheric turbulence dynamics, enabling day-and-night operation analysis and improving turbulence mitigation strategies for space-based quantum networks.
@informaq.bsky.socialIntegrated optomechanical quantum memory successfully stores and retrieves telecom-band photons at the quantum ground state with unprecedented phonon suppression (0.32 occupancy), advancing practical scalable quantum networks.
@informaq.bsky.socialTwin-field QKD network demonstrated over 127 km without active phase stabilization. Using low-cost SPADs in a Sagnac architecture, researchers achieved 93% interference visibility and practical quantum key generation for multiple users.
@informaq.bsky.socialQUASAR enables efficient evaluation of satellite quantum networks by abstracting orbital dynamics, optical loss, and memory decoherence into network-layer routing metrics, achieving 10.2× speedup over continuous polling approaches.