Zobrazeno 1 - 10
of 642
pro vyhledávání: '"F. Roos"'
Autor:
F. Roos, R.C. Bansal
Publikováno v:
Journal of Energy in Southern Africa, Vol 30, Iss 1, Pp 34-48 (2019)
This study reports on a case study in Grootegeluk Mine: Exxaro Coal, Lephalale, South Africa, in terms of power factor correction (PFC), load flow, harmonic frequency scans and harmonic voltage distortion analyses. The DIgSilent PowerFactory software
Externí odkaz:
https://doaj.org/article/e293e9d23b5b455ba0595239316c845c
Autor:
H. Hainzer, D. Kiesenhofer, T. Ollikainen, M. Bock, F. Kranzl, M. K. Joshi, G. Yoeli, R. Blatt, T. Gefen, C. F. Roos
Publikováno v:
Physical Review X, Vol 14, Iss 1, p 011033 (2024)
Ramsey interferometry is a widely used tool for precisely measuring transition frequencies between two energy levels of a quantum system, with applications in time keeping, precision spectroscopy, quantum optics, and quantum information. Often, the c
Externí odkaz:
https://doaj.org/article/a5fa97830bdc4ef4b96a310f1760d108
Autor:
Ivan Vybornyi, Laura S. Dreissen, Dominik Kiesenhofer, Helene Hainzer, Matthias Bock, Tuomas Ollikainen, Daniel Vadlejch, Christian F. Roos, Tanja E. Mehlstäubler, Klemens Hammerer
Publikováno v:
PRX Quantum, Vol 4, Iss 4, p 040346 (2023)
Coulomb crystals of cold trapped ions are a leading platform for the realization of quantum processors and quantum simulations and, in quantum metrology, for the construction of optical atomic clocks and for fundamental tests of the standard model. F
Externí odkaz:
https://doaj.org/article/1b0131746cf646b894ccc6315a35a9ba
Autor:
Florian Kranzl, Stefan Birnkammer, Manoj K. Joshi, Alvise Bastianello, Rainer Blatt, Michael Knap, Christian F. Roos
Publikováno v:
Physical Review X, Vol 13, Iss 3, p 031017 (2023)
Over the recent years, coherent, time-periodic modulation has been established as a versatile tool for realizing novel Hamiltonians. Using this approach, known as Floquet engineering, we experimentally realize a long-ranged, anisotropic Heisenberg mo
Externí odkaz:
https://doaj.org/article/59d0999acd7c430aa11c8056c4ae8d3c
Autor:
Dominik Kiesenhofer, Helene Hainzer, Artem Zhdanov, Philip C. Holz, Matthias Bock, Tuomas Ollikainen, Christian F. Roos
Publikováno v:
PRX Quantum, Vol 4, Iss 2, p 020317 (2023)
Linear strings of trapped atomic ions held in radio-frequency (rf) traps constitute one of the leading platforms for quantum simulation experiments, allowing the investigation of interacting quantum matter. However, linear ion strings have drawbacks,
Externí odkaz:
https://doaj.org/article/7186c74e692b40de8b4b7350b5ec79c7
Autor:
Florian Kranzl, Aleksander Lasek, Manoj K. Joshi, Amir Kalev, Rainer Blatt, Christian F. Roos, Nicole Yunger Halpern
Publikováno v:
PRX Quantum, Vol 4, Iss 2, p 020318 (2023)
Quantum simulators have recently enabled experimental observations of the internal thermalization of quantum many-body systems. Often, the global energy and particle number are conserved and the system is prepared with a well-defined particle number
Externí odkaz:
https://doaj.org/article/0a25254dc6834bf0a93abb307743bc91
Akademický článek
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Publikováno v:
New Journal of Physics, Vol 22, Iss 10, p 103013 (2020)
We present experiments on polarization gradient cooling of Ca ^+ multi-ion Coulomb crystals in a linear Paul trap. Polarization gradient cooling of the collective modes of motion whose eigenvectors have overlap with the symmetry axis of the trap is a
Externí odkaz:
https://doaj.org/article/57c2016966d646a7a37b1c48fa047bac
Publikováno v:
New Journal of Physics, Vol 21, Iss 7, p 073017 (2019)
Fast entangling quantum gates can significantly enhance the performance of a trapped-ion quantum computer. In pursuit of implementing a fast two-qubit gate, we investigate the coherent excitation of a ^40 Ca ^+ ion with a train of picosecond pulses r
Externí odkaz:
https://doaj.org/article/41dd832861cd46a1bef80d1290fe04bf
Publikováno v:
New Journal of Physics, Vol 21, Iss 10, p 103003 (2019)
We perform quantum logic spectroscopy with a ^27 Al ^+ / ^40 Ca ^+ mixed ion crystal in a linear Paul trap for a measurement of the ${(3{s}^{2}){}^{1}{{\rm{S}}}_{0}\leftrightarrow (3s3p)}^{3}{{\rm{P}}}_{1},F=7/2$ intercombination transition in ^27 Al
Externí odkaz:
https://doaj.org/article/8076f1029ffb41659d9380ee1ce52e6e