Quantum secure direct communication (QSDC) leverages quantum states to transmit
information securely and reliably over a noisy, lossy, and wiretapped quantum channel. It …

Free-space quantum key distribution (QKD) systems are often designed to implement
polarization-encoding protocols. Alternatively, time-bin/phase-encoding protocols are …

Fiber-based quantum communication networks are currently limited without quantum
repeaters. Satellite-based quantum links have been proposed to extend the network …

Over the last decade, free-space quantum key distribution (QKD), a secure key sharing
protocol, has risen in popularity due the adaptable nature of free-space networking and the …

Quantum key distribution (QKD) enables tap-proof exchange of cryptographic keys
guaranteed by the very laws of physics. One of the last remaining roadblocks on the way …

Experimental quantum key distribution through free-space channels requires accurate
pointing-and-tracking to co-align telescopes for efficient transmission. The hardware …

Phase stabilization of distant quantum time-bin interferometers is a major challenge for
quantum communication networks, and is typically achieved by exchanging optical …

We present an integrated single-photon detection device custom designed for quantum key
distribution (QKD) with time-bin encoded single photons. We implemented and …

Quantum key distribution (QKD) allows two users to exchange a provably secure key for
cryptographic applications. In prepare-and-measure QKD protocols, the states must be …

We demonstrate a compensation-free approach to the realization of multi-mode delay
interferometers, mainly for use in phase-encoded quantum key distribution (QKD). High …