415 citations · 2.7k across the 49 of their papers we have counts for
50 papers
Memory-assisted squeezed light velocimetry under realistic loss and incoherent noise
Mustafa Gündoğan, Arash Ahmadi, Markus Krutzik
We propose a velocity sensor based on a two-memory Mach--Zehnder interferometer fed by a coherent probe and squeezed vacuum, read out by balanced homodyne detection. One memory is…
Quantum Deep Learning: A Comprehensive Review
Yanjun Ji, Zhao-Yun Chen, Marco Roth +10
Quantum deep learning (QDL) explores the use of both quantum and quantum-inspired resources to determine when deep learning's core capabilities, such as expressivity, generalizatio…
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…
A 698 nm laser system for excitation of fluorescent quantum light sources on a CubeSat mission
Sven Schwertfeger, Elisa Da Ros, Marcel Bursy +6
This manuscript reports on the development and qualification of an ECDL-based, fiber-coupled laser system at a wavelength of λ = 698 nm for space applications. We designed and deve…
The QTF-Backbone: Proposal for a Nationwide Optical Fibre Backbone in Germany for Quantum Technology and Time and Frequency Metrology
Tara Cubel Liebisch, Peter Kaufmann, Harald Schnatz +166
The recent breakthroughs in the distribution of quantum information and high-precision time and frequency (T&F) signals over long-haul optical fibre networks have transformative po…
Satellites promise global-scale quantum networks
Sumit Goswami, Sayandip Dhara, Neil Sinclair +10
Academia, governments, and industry around the world are on a quest to build long-distance quantum communication networks for a future quantum internet. Using air and fiber channel…
Controlled Displacement of Stored Light at Room Temperature
Arash Ahmadi, Yağız Murat, Pei-Chen Kuan +2
We report the demonstration of spatially translating a stored optical pulse at room temperature over distances exceeding one optical wavelength. By implementing an interferometric…
Dark Energy Search by Atom Interferometry in the Einstein-Elevator
Charles Garcion, Sukhjovan S. Gill, Magdalena Misslisch +13
The DESIRE project aims to test chameleon field theories as potential candidates for dark energy. The chameleon field is a light scalar field that is subject to screening mechanism…
Terrestrial Very-Long-Baseline Atom Interferometry: Summary of the Second Workshop
Adam Abdalla, Mahiro Abe, Sven Abend +307
This summary of the second Terrestrial Very-Long-Baseline Atom Interferometry (TVLBAI) Workshop provides a comprehensive overview of our meeting held in London in April 2024, build…
Standalone mobile quantum memory system
Martin Jutisz, Alexander Erl, Janik Wolters +2
We present the implementation and performance analysis of a portable, rack-mounted standalone warm vapor quantum memory system, that also includes the laser package, control electr…
Proposal for a Bose-Einstein condensate based test of Born's rule using light-pulse atom interferometry
Simon Kanthak, Julia Pahl, Daniel Reiche +1
We propose and numerically benchmark light-pulse atom interferometry with ultra-cold quantum gases as a platform to test the modulo-square hypothesis of Born's rule. Our interferom…
Ramsey-Borde atom interferometry with a thermal strontium beam for a compact optical clock
Oliver Fartmann, Martin Jutisz, Amir Mahdian +4
Compact optical atomic clocks have become increasingly important in field applications and clock networks. Systems based on Ramsey-Borde interferometry (RBI) with a thermal atomic…
INTENTAS -- An entanglement-enhanced atomic sensor for microgravity
O. Anton, I. Bröckel, D. Derr +21
The INTENTAS project aims to develop an atomic sensor utilizing entangled Bose-Einstein condensates (BECs) in a microgravity environment. This key achievement is necessary to advan…
Micro-integrated crossed-beam optical dipole trap system with long-term alignment stability for mobile atomic quantum technologies
Marc Christ, Oliver Anton, Conrad Zimmermann +3
Quantum technologies extensively use laser light for state preparation, manipulation, and readout. For field applications, these systems must be robust and compact, driving the nee…
Additively manufactured ceramics for compact quantum technologies
Marc Christ, Conrad Zimmermann, Sascha Neinert +3
Quantum technologies are advancing from fundamental research in specialized laboratories to practical applications in the field, driving the demand for robust, scalable, and reprod…
Review and experimental benchmarking of machine learning algorithms for efficient optimization of cold atom experiments
Oliver Anton, Victoria A. Henderson, Elisa Da Ros +4
The generation of cold atom clouds is a complex process which involves the optimization of noisy data in high dimensional parameter spaces. Optimization can be challenging both in…
Terrestrial Very-Long-Baseline Atom Interferometry: Workshop Summary
Sven Abend, Baptiste Allard, Iván Alonso +250
This document presents a summary of the 2023 Terrestrial Very-Long-Baseline Atom Interferometry Workshop hosted by CERN. The workshop brought together experts from around the world…
Time-delayed single satellite quantum repeater node for global quantum communications
Mustafa Gündoğan, Jasminder S. Sidhu, Markus Krutzik +1
Global-scale quantum networking faces significant technical and scientific obstacles. Quantum repeaters (QRs) have been proposed to overcome the inherent direct transmission range…
QUICK -- Design of a satellite-based quantum light source for quantum communication and extended physical theory tests in space
Najme Ahmadi, Sven Schwertfeger, Philipp Werner +19
Modern quantum technologies have matured such that they can now be used in space applications, e.g., long-distance quantum communication. Here, we present the design of a compact t…
Proposal for a long-lived quantum memory using matter-wave optics with Bose-Einstein condensates in microgravity
Elisa Da Ros, Simon Kanthak, Erhan Sağlamyürek +2
Bose-Einstein condensates are a promising platform for optical quantum memories, but suffer from several decoherence mechanisms, leading to short memory lifetimes. While some of th…
Light-Pulse Atom Interferometric Test of Continuous Spontaneous Localization
Sascha Vowe, Sandro Donadi, Vladimir Schkolnik +3
We investigate the effect of the Continuous Spontaneous Localization (CSL) model on light-pulse atom interferometry. Using a path-integral approach with an additional stochastic po…
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…
Optical Atomic Clock aboard an Earth-orbiting Space Station (OACESS): Enhancing searches for physics beyond the standard model in space
Vladimir Schkolnik, Dmitry Budker, Oliver Fartmann +13
We present a concept for a high-precision optical atomic clock (OAC) operating on an Earth-orbiting space station. This pathfinder science mission will compare the space-based OAC…
Linien: A versatile, user-friendly, open-source FPGA-based tool for frequency stabilization and spectroscopy parameter optimization
Benjamin Wiegand, Bastian Leykauf, Robert Jördens +1
We present a user-friendly and versatile tool for laser frequency stabilization. Its main focus is spectroscopy locking, but the software is suitable for lock-in techniques in gene…