Quantum theory has been successfully validated in numerous laboratory experiments. But
would such a theory, which effectively describes the behavior of microscopic physical …

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

Significant progress has been made in satellite-based quantum key distribution (QKD), and
urgent follow-up work is to explore the optimal solution for building practical quantum …

Entanglement swap** at telecom wavelengths is at the heart of quantum networking in
optical fiber infrastructures. Although entanglement swap** has been demonstrated …

Quantum cryptography is a promising technology that achieves unconditional security,
which is essential to a wide range of sensitive applications. In contrast to optical fiber, the …

Quantum key distribution (QKD) is a pioneering quantum technology on the brink of
widespread deployment. Nevertheless, the distribution of secret keys beyond a few 100 km …

A systematic analysis of the advantages and challenges associated with the satellite‐based
implementation of the high dimensional extended B92 (HD‐Ext‐B92) and high‐dimensional …

We demonstrate pulsed polarization-entangled photons generated from a periodically poled
KTiOPO_4 (PPKTP) crystal in a Sagnac interferometer configuration at telecom wavelength …

Polarization entangled photon pair source is widely used in many quantum information
processing applications such as teleportation, quantum communications, quantum …

Quantum entanglement was termed “spooky action at a distance” in the well-known paper
by Einstein, Podolsky, and Rosen. Entanglement is expected to be distributed over longer …