Zobrazeno 1 - 10
of 46
pro vyhledávání: '"Wölk, Sabine"'
Autor:
Hamann, Arne, Wölk, Sabine
In the last decade quantum machine learning has provided fascinating and fundamental improvements to supervised, unsupervised and reinforcement learning. In reinforcement learning, a so-called agent is challenged to solve a task given by some environ
Externí odkaz:
http://arxiv.org/abs/2107.14001
Autor:
Saggio, Valeria, Asenbeck, Beate E., Hamann, Arne, Strömberg, Teodor, Schiansky, Peter, Dunjko, Vedran, Friis, Nicolai, Harris, Nicholas C., Hochberg, Michael, Englund, Dirk, Wölk, Sabine, Briegel, Hans J., Walther, Philip
Publikováno v:
Nature 591, 229-233 (2021)
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 within AI is reinforcement learning (RL), where agents interact with env
Externí odkaz:
http://arxiv.org/abs/2103.06294
Publikováno v:
Phys. Rev. Research 2, 023052 (2020)
We consider distributed sensing of non-local quantities. We introduce quantum enhanced protocols to directly measure any (scalar) field with a specific spatial dependence by placing sensors at appropriate positions and preparing a spatially distribut
Externí odkaz:
http://arxiv.org/abs/1905.06765
Autor:
Weidner, Felix M., Schwab, Julian D., Wölk, Sabine, Rupprecht, Felix, Ikonomi, Nensi, Werle, Silke D., Hoffmann, Steve, Kühl, Michael, Kestler, Hans A.
Publikováno v:
In Patterns 10 March 2023 4(3)
Publikováno v:
New J. Phys. 21, 013015 (2019)
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 necessarily completely positive due to statistical or systematic error
Externí odkaz:
http://arxiv.org/abs/1808.10336
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 RF radiation applied to bare ionic states in a static magnetic field
Externí odkaz:
http://arxiv.org/abs/1710.09241
Autor:
Sriarunothai, Theeraphot, Wölk, Sabine, Giri, Gouri Shankar, Friis, Nicolai, Dunjko, Vedran, Briegel, Hans J., Wunderlich, Christof
Publikováno v:
Quantum Sci. Technol. 4, 015014 (2019)
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-driven trapped ions. The decision-making process of a quantum learning
Externí odkaz:
http://arxiv.org/abs/1709.01366
Publikováno v:
Phys. Rev. A 96, 042319 (2017)
We develop a general theory to estimate magnetic field gradients in quantum metrology. We consider a system of $N$ particles distributed on a line whose internal degrees of freedom interact with a magnetic field. Usually gradient estimation is based
Externí odkaz:
http://arxiv.org/abs/1703.09123
Publikováno v:
New J. Phys. 20, 053058 (2018)
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 deviations from the maximally mixed state. We establish a direct connection bet
Externí odkaz:
http://arxiv.org/abs/1612.07570
Publikováno v:
Phys. Rev. A 94, 052306 (2016)
We investigate phase and frequency estimation with different measurement strategies under the effect of collective phase noise. First, we consider the standard linear estimation scheme and present an experimentally realisable optimization of the init
Externí odkaz:
http://arxiv.org/abs/1607.05160