Publications (30)
Towards Precision Spectroscopy of Antiprotonic Atoms for Probing Strong-field QED
Gonçalo Baptista, Shikha Rathi, Michael Roosa +26
PAX (antiProtonic Atom X-ray spectroscopy) is a new experiment with the aim to test strong-field quantum electrodynamics (QED) effects by performing high-precision x-ray spectrosco…
Ultracold Chemistry and its Reaction Kinetics
Florian Richter, Daniel Becker, Cédric Bény +3
We study the reaction kinetics of chemical processes occurring in the ultracold regime and systematically investigate their dynamics. Quantum entanglement is found to play a key ro…
Towards a -function in 4D quantum gravity
Daniel Becker, Martin Reuter
We develop a generally applicable method for constructing functions, , which have properties similar to Zamolodchikov's -function, and are geometrically natural objects relat…
Road Network Variation Based on HD Map Analysis for the Simulative Safety Assurance of Automated Vehicles
Daniel Becker, Christian Geller, Lutz Eckstein
The validation and verification of automated driving functions (ADFs) is a challenging task on the journey of making those functions available to the public beyond the current rese…
Strategy for implementing stabilizer-based codes on solid-state qubits
Tetsufumi Tanamoto, Vladimir M. StojanoviÄ, Christoph Bruder +1
We present a method for implementing stabilizer-based codes with encoding schemes of the operator quantum error correction paradigm, e.g., the "standard" five-qubit and CSS codes,…
Dynamic Generation of Topologically Protected Self-Correcting Quantum Memory
Daniel Becker, Tetsufumi Tanamoto, Adrian Hutter +2
We propose a scheme to dynamically realize a quantum memory based on the toric code. The code is generated from qubit systems with typical two-body interactions (Ising, XY, Heisenb…
Momentum distributions and numerical methods for strongly interacting one-dimensional spinor gases
Frank Deuretzbacher, Daniel Becker, Luis Santos
One-dimensional spinor gases with strong delta interaction fermionize and form a spin chain. The spatial degrees of freedom of this atom chain can be described by a mapping to spin…
Nonequilibrium quantum dynamics of the magnetic Anderson model
Daniel Becker, Stephan Weiss, Michael Thorwart +1
We study the non-equilibrium dynamics of a spinful single-orbital quantum dot with an incorporated quantum mechanical spin-1/2 magnetic impurity. Due to the spin degeneracy, double…
Exact Solution of Strongly Interacting Quasi-One-Dimensional Spinor Bose Gases
Frank Deuretzbacher, Klaus Fredenhagen, Daniel Becker +3
We present an exact analytical solution of the fundamental system of quasi-one-dimensional spin-1 bosons with infinite delta-repulsion. The eigenfunctions are constructed from the…
Nuclear Data Needs for Microcalorimetry and Non-destructive Assay
Geon-Bo Kim, Begona Aranguren-Barrado, Shamsuzzoha Basunia +5
Cryogenic microcalorimeters are state-of-the-art radiation detectors using superconducting and quantum technologies. They can resolve complex X-ray and low-energy γ-ray spectra wi…
Coulomb-Blocked Transport Through a Quantum Dot with Spin-Split Level: Increase of Differential Conductance Peaks by Spin Relaxation
Daniel Becker, Daniela Pfannkuche
Non-equilibrium transport through a quantum dot with one spin-split single-particle level is studied in the cotunneling regime at low temperatures. The Coulomb diamond can be subdi…
Integration of an Agent Model into an Open Simulation Architecture for Scenario-Based Testing of Automated Vehicles
Christian Geller, Daniel Becker, Jobst Beckmann +1
Simulative and scenario-based testing are crucial methods in the safety assurance for automated driving systems. To ensure that simulation results are reliable, the real world must…
On avoiding Ostrogradski instabilities within Asymptotic Safety
Daniel Becker, Chris Ripken, Frank Saueressig
We study the renormalization group flow of gravity coupled to scalar matter using functional renormalization group techniques. The novel feature is the inclusion of higher-derivati…
Design of a mission to measure the shape and substructure of the 511 keV gamma-ray line from the center of the Milky Way
Kun Hu, Matthew Fritts, Daniel Becker +23
The 511 keV electron-positron annihilation feature near the galactic center has been detected for more than half a century, yet its origin remains a mystery. In this paper, we desc…
Preserving universal resources for one-way quantum computing
Tetsufumi Tanamoto, Daniel Becker, Vladimir M. StojanoviÄ +1
The common spin Hamiltonians such as the Ising, XY, or Heisenberg model do not have ground states that are the graph states needed in measurement-based quantum computation. Various…
The 511-CAM Mission: A Pointed 511 keV Gamma-Ray Telescope with a Focal Plane Detector Made of Stacked Transition Edge Sensor Microcalorimeter Arrays
Farzane Shirazi, Md. Arman Hossen, Daniel Becker +18
The 511 keV gamma-ray emission from the galactic center region may fully or partially originate from the annihilation of positrons from dark matter particles with electrons from th…
Propagating gravitons vs. dark matter in asymptotically safe quantum gravity
Daniel Becker, Martin Reuter
Within the Asymptotic Safety scenario, we discuss whether Quantum Einstein Gravity (QEG) can give rise to a semi-classical regime of propagating physical gravitons (gravitational w…
Generation of Complex Road Networks Using a Simplified Logical Description for the Validation of Automated Vehicles
Daniel Becker, Fabian RuÃ, Christian Geller +1
Simulation is a valuable building block for the verification and validation of automated driving functions (ADF). When simulating urban driving scenarios, simulation maps are one i…
Is there a -function in 4D Quantum Einstein Gravity?
Daniel Becker, Martin Reuter
We describe a functional renormalization group-based method to search for `-like' functions with properties similar to that in 2D conformal field theory. It exploits the mode co…
Perfectly Secure Key Agreement Over a Full Duplex Wireless Channel
Gerhard Wunder, Axel Flinth, Daniel Becker +1
Secret key generation (SKG) between authenticated devices is a pivotal task for secure communications. Diffie-Hellman (DH) is de-facto standard but not post-quantum secure. In this…
Open-Source Tool Based Framework for Automated Performance Evaluation of an AD Function
Daniel Becker, Sanath Konthala, Lutz Eckstein
As automation in the field of automated driving (AD) progresses, ensuring the safety and functionality of AD functions (ADFs) becomes crucial. Virtual scenario-based testing has em…
Reflection positivity in higher derivative scalar theories
Francesca Arici, Daniel Becker, Chris Ripken +2
Reflection positivity constitutes an integral prerequisite in the Osterwalder-Schrader reconstruction theorem which relates quantum field theories defined on Euclidean space to the…
Guideline for Trustworthy Artificial Intelligence -- AI Assessment Catalog
Maximilian Poretschkin, Anna Schmitz, Maram Akila +11
Artificial Intelligence (AI) has made impressive progress in recent years and represents a key technology that has a crucial impact on the economy and society. However, it is clear…
ASCENT - A balloon-borne hard X-ray imaging spectroscopy telescope using transition edge sensor microcalorimeter detectors
Fabian Kislat, Daniel Becker, Douglas Bennett +26
Core collapse supernovae are thought to be one of the main sources in the galaxy of elements heavier than iron. Understanding the origin of the elements is thus tightly linked to o…
Semiparametric inference for partially linear regressions with Box-Cox transformation
Daniel Becker, Alois Kneip, Valentin Patilea
In this paper, a semiparametric partially linear model in the spirit of Robinson (1988) with Box- Cox transformed dependent variable is studied. Transformation regression models ar…
En route to Background Independence: Broken split-symmetry, and how to restore it with bi-metric average actions
Daniel Becker, Martin Reuter
The most momentous requirement a quantum theory of gravity must satisfy is Background Independence, necessitating in particular an ab initio derivation of the arena all non-gravita…
Highly-multiplexed microwave SQUID readout using the SLAC Microresonator Radio Frequency (SMuRF) Electronics for Future CMB and Sub-millimeter Surveys
Shawn W. Henderson, Zeeshan Ahmed, Jason Austermann +29
The next generation of cryogenic CMB and submillimeter cameras under development require densely instrumented sensor arrays to meet their science goals. The readout of large number…
Lithographic integration of TES microcalorimeters with SQUID multiplexer circuits for large format spectrometers
Robinjeet Singh, Avirup Roy, Daniel Becker +12
Arrays of hundreds or thousands of low temperature detectors have been deployed for many experiments, both bolometers for long wavelength applications and calorimeters for shorter…
Simulative Performance Analysis of an AD Function with Road Network Variation
Daniel Becker, Guido Küppers, Lutz Eckstein
Automated driving functions (ADFs) have become increasingly popular in recent years. However, their safety must be assured. Thus, the verification and validation of these functions…
Improved Nondestructive Isotopic Analysis with Practical Microcalorimeter Gamma Spectrometers
Mark Croce, Daniel Becker, Katrina E. Koehler +1
Advances in both instrumentation and data analysis software are now enabling the first ultra-high-resolution microcalorimeter gamma spectrometers designed for implementation in nuc…