4 papers
Generation of squeezed optical states via stored classical pulses in a Bose gas
Sevilay Sevinçli, Dennis Rätzel, Markus Krutzik +2
We propose and analyze a scheme to generate squeezed light by storing a classical probe pulse in a Bose--Einstein condensate (BEC) and exploiting the nonlinear evolution caused by…
Gravitational time dilation in quantum clock interferometry with entangled multi-photon states and quantum memories
Mustafa Gündoğan, Roy Barzel, Dennis Rätzel
Gravitational time dilation implies that clocks held at different heights accumulate different proper times. We analyze a memory-assisted quantum clock interferometer in which a fr…
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…
Quantum Imaging as alternative readout in atom interferometry: The case 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…