Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Stephan Häfner"'
Publikováno v:
International Journal of Antennas and Propagation, Vol 2019 (2019)
Antenna array calibration methods and narrowband direction finding (DF) techniques will be outlined and compared for a uniform circular array. DF is stated as an inverse problem, which solution requires a parametric model of the array itself. Because
Externí odkaz:
https://doaj.org/article/707e3480ec334375900504e94b143396
Publikováno v:
Signal Processing. 197:108542
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65c8119b3d32a64b17689bf49fb350fc
https://doi.org/10.1016/j.sigpro.2022.108542
https://doi.org/10.1016/j.sigpro.2022.108542
Autor:
Ivo Zawischa, Kian Janami, Dirk Sutter, Stephan Häfner, Benyamin Shnirman, Daniel Flamm, Ulf Quentin, Jonathan Brons, Aleksander Budnicki, Carolin Wagner, Steffen Ruebling, Daniel Grossmann, Marc Sailer, Axel Fehrenbacher, Markus Ginter
Publikováno v:
Nonlinear Frequency Generation and Conversion: Materials and Devices XX.
Ultrashort laser pulses in the deep ultraviolet (DUV) based on nonlinear-optical conversion of NIR solid state sources promise advantages for the machining of wide-bandgap materials such as compound semiconductors like indium / aluminum / gallium nit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::034c1b2126cbf47c488dea008037e19a
https://doi.org/10.1117/12.2577162
https://doi.org/10.1117/12.2577162
Publikováno v:
Physical Review A. 100
We report on the observation of dipolar splitting in $^{6}\mathrm{Li}\phantom{\rule{4pt}{0ex}}p$-wave Feshbach resonances by high-resolution atom-loss spectroscopy. The Feshbach resonances at 159, 185, and $215\phantom{\rule{0.28em}{0ex}}\mathrm{G}$
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::87c1dc956d04829c701d95c14899b24a
https://doi.org/10.1103/physreva.100.050701
https://doi.org/10.1103/physreva.100.050701
Publikováno v:
National Science Review. 3:174-188
The Efimov scenario is a universal three-body effect addressing many areas of modern quantum physics. It plays an important role in the transition between few- and many-body physics and has enabled important breakthroughs in the understanding of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa78fc84000db7e211bbbba9f63607c7
https://doi.org/10.1093/nsr/nww018
https://doi.org/10.1093/nsr/nww018
Autor:
Matthias Weidemüller, Yujun Wang, Chris H. Greene, Juris Ulmanis, Stephan Häfner, E. D. Kuhnle
We experimentally and theoretically study the effect of the intraspecies scattering length onto the heteronuclear Efimov scenario, following up on our earlier observation of Efimov resonances in an ultracold Cs-Li mixture for negative [Pires et al.,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4250895cceaf73386bc9779608659371
Autor:
Matthias Weidemüller, Chris H. Greene, Juris Ulmanis, R. Pires, Stephan Häfner, E. D. Kuhnle, Yujun Wang
We investigate theoretically and experimentally the heteronuclear Efimov scenario for a three-body system that consists of two bosons and one distinguishable particle with positive intraspecies scattering lengths. The three-body parameter at the thre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9c5e88a53102507c6bf2b8b411395739
Autor:
Matthias Weidemüller, Félix Werner, Dmitry S. Petrov, R. Pires, E. D. Kuhnle, Stephan Häfner, Juris Ulmanis
Publikováno v:
Physical Review A
Physical Review A, American Physical Society, 2016, 93, pp.022707
Physical Review A, American Physical Society, 2016, 93 (2), pp.022707. ⟨10.1103/PhysRevA.93.022707⟩
Physical Review A, American Physical Society, 2016, 93, pp.022707
Physical Review A, American Physical Society, 2016, 93 (2), pp.022707. ⟨10.1103/PhysRevA.93.022707⟩
We study Efimov resonances via three-body loss in an ultracold two-component gas of fermionic $^{6}\mathrm{Li}$ and bosonic $^{133}\mathrm{Cs}$ atoms close to a Feshbach resonance at 843 G, extending results reported previously [Pires et al., Phys. R
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f316f9cf57b4d788302edb530274134
Autor:
Andre Durr, Dennis Bohm, Dominik Schwarz, Stephan Hafner, Reiner Thoma, Christian Waldschmidt
Publikováno v:
IEEE Journal of Microwaves, Vol 2, Iss 2, Pp 239-252 (2022)
For multistatic radar networks in the upper mm-wave range with a large spacing between its radar sensor nodes, a coherent signal distribution is very complex and thus very costly. Hence, it is desirable to generate the mm-wave signals individually fo
Externí odkaz:
https://doaj.org/article/a656f94ee7af40dc9f1b966983112686
Autor:
Matthias Weidemüller, M. Repp, Juris Ulmanis, Stephan Häfner, A. Arias, E. D. Kuhnle, R. Pires
We observe two consecutive heteronuclear Efimov resonances in an ultracold Li-Cs mixture by measuring three-body loss coefficients as a function of magnetic field near a Feshbach resonance. The first resonance is detected at a scattering length of $a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a09159fa925a3ef10c4c3024d711c364