3 papers
gr-qc2026
General orbital perturbation theory in Schwarzschild space-time
Oleksii Yanchyshen, Eva Hackmann, Claus Lämmerzahl
We derive general relativistic Gaussian equations for osculating elements for orbits under the influence of a perturbing force without any restrictions in an underlying Schwarzschi…
quant-ph2025
Frequency shifts due to relativistic effects and retardation in continuous variable quantum key distribution
Emanuel Schlake, Jan P. Hackstein, Roy Barzel +3
Space-based quantum communication naturally involves satellites and ground stations exchanging optical signals at high altitudes and large relative velocities. Starting from genera…
gr-qc2024
Quantum Imaging of Gravity
Marian Cepok, Dennis Rätzel, Claus Lämmerzahl
We propose a quantum imaging-inspired setup for measuring gravitational fields using an atom that emits a photon at one of two possible locations. The atom acquires a gravitational…