69 citations · 103 across the 7 of their papers we have counts for
8 papers
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…
Pulse shape optimization against Doppler shifts and delays in optical quantum communication
Emanuel Schlake, Roy Barzel, Dennis Rätzel +1
High relative velocities and large distances in space-based quantum communication with satellites in lower earth orbits can lead to significant Doppler shifts and delays of the sig…
Entanglement dynamics of photon pairs and quantum memories in the gravitational field of the earth
Roy Barzel, Mustafa Gündoğan, Markus Krutzik +2
We investigate the effect of entanglement dynamics due to gravity -- the basis of a mechanism of universal decoherence -- for photonic states and quantum memories in Mach-Zehnder a…
Observer dependence of photon bunching: The influence of the relativistic redshift on Hong-Ou-Mandel interference
Roy Barzel, David Edward Bruschi, Andreas W. Schell +1
We study the influence of the relativistic redshift on Hong-Ou-Mandel (HOM) interference, and present a genuine quantum test of general relativity. We use Glauber's theory of quant…
Role of indistinguishability and entanglement in Hong-Ou-Mandel interference and finite bandwidth effects of frequency entangled photons
Roy Barzel, Claus Laemmerzahl
We investigate the relation between indistinguishability and quantum entanglement in Hong- Ou-Mandel-interference experiments theoretically and relate these quantum mechanical prin…
Delayed transition to coherent emission in nanolasers with extended gain media
Frederik Lohof, Roy Barzel, Paul Gartner +1
The realization of high- lasers is one of the prime applications of cavity-QED promising ultra-low thresholds, integrability and reduced power consumption in the field of \texti…
On thresholdless lasing features in high- nitride nanobeam cavities: a quantum optical study
Stefan T. Jagsch, Noelia Vico Triviño, Frederik Lohof +11
Exploring the limits of spontaneous emission coupling is not only one of the central goals in the development of nanolasers, it is also highly relevant regarding future large-scale…