Over the past few decades, significant progress has been made in quantum information
technology, from theoretical studies to experimental demonstrations. Revolutionary quantum …

Since its discovery, the quantum entanglement becomes a promising resource in quantum
communication and computation. However, the entanglement is fragile due to the presence …

High-quality long-distance entanglement is essential for both quantum communication and
scalable quantum networks. Entanglement purification is to distill high-quality entanglement …

Quantum secure direct communication (QSDC) can directly transmit secrete messages
through a quantum channel. Device-independent (DI) QSDC can guarantee the …

Quantum repeaters—important components of a scalable quantum internet—enable
entanglement to be distributed over long distances. The standard paradigm for a quantum …

Entangled photon sources are desirable and key elements for photonic quantum information
processing. The spontaneous parametric down‐conversion (SPDC) process is a convenient …

The phenomenon of entanglement marks one of the furthest departures from classical
physics and is indispensable for quantum information processing. Despite its fundamental …

Entanglement purification is to distill high-quality entangled states from low-quality
entangled states. It is a key step in quantum repeaters, determines the efficiency and …

Photonic quantum information processing relies on operating the quantum state of photons,
which usually involves bulky optical components unfavorable for system miniaturization and …

The standard approach to realize a quantum repeater relies upon probabilistic but heralded
entangled state manipulations and the storage of quantum states while waiting for …