Quantum key distribution (QKD) is a family of protocols for growing a private encryption key
between two parties. Despite much progress, all ground-based QKD approaches have a …

The recent launch of the Micius quantum-enabled satellite heralds a major step forward for
long-range quantum communication. Using single-photon discrete-variable quantum states …

We propose a quantum experiment to measure with high precision the Schwarzschild
spacetime parameters of the Earth. The scheme can also be applied to measure distances …

We propose performing quantum optics experiments in a ground-to-space scenario using
the International Space Station, which is equipped with a glass viewing window and a …

To implement the BB84 decoy-state quantum key distribution (QKD) protocol over a lossy
ground-satellite quantum uplink requires a source that has high repetition rate of short laser …

Quantum key distribution (QKD) is a cryptographic method enabling two parties to establish
a private encryption key. The range of communication of ground-based QKD is limited to an …

Spacetime curvature of the Earth deforms wave packets of photons sent from the Earth to
satellites, thus influencing the quantum state of light. We show that Gaussian steering of …

Light wave-packets propagating from the Earth to satellites will be deformed by the curved
background spacetime of the Earth, thus influencing the quantum state of light. We show that …

The preparation of quantum systems and the execution of quantum information tasks
between distant users are always affected by gravitational and relativistic effects. In this …

We study the problem of estimating the Schwarzschild radius of a massive body using
Gaussian quantum probe states. Previous calculations assumed that the probe state …