178 citations · 571 across the 16 of their papers we have counts for
17 papers
Quantum control of solid state qubits via Reinforcement Learning
Dennis Herb, Mirko Rossini, Sabine Wölk +3
The use of reinforcement learning (RL) in the design of quantum control strategies for pulse level control of NISQ era quantum devices is attracting growing interest. Model-free RL…
A hybrid learning agent for episodic learning tasks with unknown target distance
Oliver Sefrin, Sabine Wölk
The "hybrid agent for quantum-accessible reinforcement learning", as defined in (Hamann and Wölk, 2022), provides a proven quasi-quadratic speedup and is experimentally tested. How…
Performance analysis of a hybrid agent for quantum-accessible reinforcement learning
Arne Hamann, Sabine Wölk
In the last decade quantum machine learning has provided fascinating and fundamental improvements to supervised, unsupervised and reinforcement learning. In reinforcement learning,…
Experimental quantum speed-up in reinforcement learning agents
Valeria Saggio, Beate E. Asenbeck, Arne Hamann +10
Increasing demand for algorithms that can learn quickly and efficiently has led to a surge of development within the field of artificial intelligence (AI). An important paradigm wi…
Quantum-accessible reinforcement learning beyond strictly epochal environments
A. Hamann, V. Dunjko, S. Wölk
In recent years, quantum-enhanced machine learning has emerged as a particularly fruitful application of quantum algorithms, covering aspects of supervised, unsupervised and reinfo…
Noisy distributed sensing in the Bayesian regime
S. Wölk, P. Sekatski, W. Dür
We consider non-local sensing of scalar signals with specific spatial dependence in the Bayesian regime. We design schemes that allow one to achieve optimal scaling and are immune…
Distinguishing between statistical and systematic errors in quantum process tomography
Sabine Wölk, Theeraphot Sriarunothai, Gouri S. Giri +1
It is generally assumed that every process in quantum physics can be described mathematically by a completely positive map. However, experimentally reconstructed processes are not…
Radio-frequency sideband cooling and sympathetic cooling of trapped ions in a static magnetic field gradient
Theeraphot Sriarunothai, Gouri Shankar Giri, Sabine Wölk +1
We report a detailed investigation on near-ground state cooling of one and two trapped atomic ions. We introduce a simple sideband cooling method for confined atoms and ions, using…
Speeding-up the decision making of a learning agent using an ion trap quantum processor
Theeraphot Sriarunothai, Sabine Wölk, Gouri Shankar Giri +4
We report a proof-of-principle experimental demonstration of the quantum speed-up for learning agents utilizing a small-scale quantum information processor based on radiofrequency-…
Estimation of gradients in quantum metrology
Sanah Altenburg, Michał Oszmaniec, Sabine Wölk +1
We develop a general theory to estimate magnetic field gradients in quantum metrology. We consider a system of particles distributed on a line whose internal degrees of freedom…
Maximal Coherence and the Resource Theory of Purity
Alexander Streltsov, Hermann Kampermann, Sabine Wölk +2
The resource theory of quantum coherence studies the off-diagonal elements of a density matrix in a distinguished basis, whereas the resource theory of purity studies all deviation…
Generalized Effective Operator Formalism for Decaying Systems
Marius Paraschiv, Sabine Wölk, Thomas Mannel +1
Systems of neutral kaons can be used to observe entanglement and the violation of Bell inequalities. The decay of these particles poses some problems, however, and recently an effe…
Quantum dynamics of trapped ions in a dynamic field gradient using dressed states
Sabine Wölk, Christof Wunderlich
Novel ion traps that provide either a static or a dynamic magnetic gradient field allow for the use of radio frequency (rf) radiation for coupling internal and motional states of i…
Versatile microwave-driven trapped ion spin system for quantum information processing
Ch. Piltz, Th. Sriarunothai, S. Ivanov +2
Using trapped atomic ions we demonstrate a tailored and versatile effective spin-system suitable for quantum simulations and universal quantum computation. By simply applying micro…
State selective detection of hyperfine qubits
Sabine Wölk, Christian Piltz, Theeraphot Sriarunothai +1
In order to faithfully detect the state of an individual two-state quantum system (qubit) realized using, for example, a trapped ion or atom, state selective scattering of resonanc…
Higher order wave-particle duality
Jie-Hui Huang, Sabine Wölk, Shi-Yao Zhu +1
The complementarity of single-photon's particle-like and wave-like behaviors can be described by the inequality , with being the path distinguishability and …
Accurate phase measurement with classical light
Sabine Wölk, Wenchao Ge, M. Suhail Zubairy
In this paper we investigate whether it is in general possible to substitute maximally path-entangled states, namely NOON-states by classical light in a Doppleron-type resonant mul…