69 citations · 251 across the 22 of their papers we have counts for
23 papers
Programmable photonic state fusion via heralded storage of asynchronously generated resources
Mustafa Gündoğan, Dennis Rätzel
Probabilistic photonic sources generate elementary states in different trials, whereas multiphoton protocols require them to interfere in common temporal modes. We propose a fusion…
Cascaded Optomechanical Sensing for Small Signals
Marta Maria Marchese, Daniel Braun, Stefan Nimmrichter +1
We propose a sensing scheme for detecting weak forces that achieves Heisenberg-limited sensitivity without relying on entanglement or other non-classical resources. Our scheme util…
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…
Gravitational attraction of ultra-relativistic matter: A new testbed for modified gravity at the Large Hadron Collider
Christian Pfeifer, Dennis Rätzel, Daniel Braun
We derive the scalar-tensor modification of the gravitational field of an ultrarelativistic particle beam and its effect on a test particle that is used as sensor. To do so, we sol…
Non-linear media in weakly curved spacetime: optical solitons and probe pulses for gravimetry
Alessio Belenchia, Felix Spengler, Dennis Rätzel +1
That light propagating in a gravitational field gets frequency-shifted is one of the basic consequences of any metric theory of gravity rooted in the equivalence principle. At the…
Spin Resonance Spectroscopy with an Electron Microscope
Philipp Haslinger, Stefan Nimmrichter, Dennis Rätzel
Coherent spin resonance methods, such as nuclear magnetic resonance and electron spin resonance spectroscopy, have led to spectrally highly sensitive, non-invasive quantum imaging…
Optical solitons in curved spacetime
Felix Spengler, Alessio Belenchia, Dennis Rätzel +1
Light propagation in curved spacetime is at the basis of some of the most stringent tests of Einstein's general relativity. At the same time, light propagation in media is at the b…
Enhanced Gravitational Entanglement via Modulated Optomechanics
A. Douglas K. Plato, Dennis Rätzel, Chuanqi Wan
The role of entanglement in determining the non-classicality of a given interaction has gained significant traction over the last few years. In particular, as the basis for new exp…
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…
Observation of Light-Induced Dipole-Dipole Forces in Ultracold Atomic Gases
Mira Maiwöger, Matthias Sonnleitner, Tiantian Zhang +7
We investigate an attractive force caused by light induced dipole-dipole interactions in freely expanding ultracold 87Rb atoms. This collective, light-triggered effect results in a…
Influence of cosmological expansion in local experiments
Felix Spengler, Alessio Belenchia, Dennis Rätzel +1
Whether the cosmological expansion can influence the local dynamics, below the galaxy clusters scale, has been the subject of intense investigations in the past three decades. In t…
Constraining modified gravity with quantum optomechanics
Sofia Qvarfort, Dennis Rätzel, Stephen Stopyra
We derive the best possible bounds that can be placed on Yukawa- and chameleon-like modifications to the Newtonian gravitational potential with a cavity optomechanical quantum sens…
Perspectives of measuring gravitational effects of laser light and particle beams
Felix Spengler, Dennis Rätzel, Daniel Braun
We study possibilities of creation and detection of oscillating gravitational fields from lab-scale high energy, relativistic sources. The sources considered are high energy laser…
A Quantum Klystron -- Controlling Quantum Systems with Modulated Electron Beams
Dennis Rätzel, Daniel Hartley, Osip Schwartz +1
Coherent control of quantum transitions -- indispensable in quantum technology -- generally relies on the interaction of quantum systems with electromagnetic radiation. Here, we th…
Analogue simulation of gravitational waves in a 3+1 dimensional Bose-Einstein condensate
Daniel Hartley, Tupac Bravo, Dennis Rätzel +2
The recent detections of gravitational waves (GWs) by the LIGO and Virgo collaborations have opened the field of GW astronomy, intensifying interest in GWs and other possible detec…
Frequency spectrum of an optical resonator in a curved spacetime
Dennis Rätzel, Fabienne Schneiter, Daniel Braun +4
The effect of gravity and proper acceleration on the frequency spectrum of an optical resonator - both rigid or deformable - is considered in the framework of general relativity. T…
Testing small scale gravitational wave detectors with dynamical mass distributions
Dennis Rätzel, Ivette Fuentes
The recent discovery of gravitational waves by the LIGO-Virgo collaboration created renewed interest in the investigation of alternative gravitational detector designs, such as sma…
Gravitational properties of light - The emission of counter-propagating laser pulses from an atom
Dennis Rätzel, Martin Wilkens, Ralf Menzel
The gravitational field of a laser pulse, although not detectable at the moment, comes with a peculiar feature which continues to attract attention; cause and effect propagate with…
The effect of polarization entanglement in photon-photon scattering
Dennis Rätzel, Martin Wilkens, Ralf Menzel
It is found that the differential cross section of photon-photon scattering is a function of the degree of polarization entanglement of the two-photon state. A reduced, general exp…
Gravitational properties of light - The gravitational field of a laser pulse
Dennis Rätzel, Martin Wilkens, Ralf Menzel
The gravitational field of a laser pulse of finite lifetime, is investigated in the framework of linearized gravity. Although the effects are very small, they may be of fundamental…
The effect of entanglement in gravitational photon-photon scattering
Dennis Rätzel, Martin Wilkens, Ralf Menzel
The differential cross section for gravitational photon-photon scattering calculated in Perturbative Quantum Gravity is shown to depend on the degree of polarization entanglement o…
Quantum field theory on timelike hypersurfaces in Rindler space
Daniele Colosi, Dennis Rätzel
The general boundary formulation of quantum field theory is applied to a massive scalar field in two dimensional Rindler space. The field is quantized according to both the Schrödi…
The Unruh-deWitt Detector and the Vacuum in the General Boundary formalism
Ralf Banisch, Frank Hellmann, Dennis Raetzel
We discuss how to formulate a condition for choosing the vacuum state of a quantum scalar field on a timelike hyperplane in the general boundary formulation (GBF) using the couplin…