Zobrazeno 1 - 10
of 160
pro vyhledávání: '"Krüger, Olaf"'
Autor:
Pregnolato, Tommaso, Stucki, Marco E., Bopp, Julian M., Hoeven, Maarten H. v. d., Gokhale, Alok, Krüger, Olaf, Schröder, Tim
Color centers in diamond are quantum systems with optically active spin-states that show long coherence times and are therefore a promising candidate for the development of efficient spin-photon interfaces. However, only a small portion of the emitte
Externí odkaz:
http://arxiv.org/abs/2311.03618
We give a simple classification of the independent $n$-point interaction vertices for bosonic higher-spin gauge fields in $d$-dimensional Minkowski space-times. We first give a characterisation of such vertices for large dimensions, $d \geq 2n - 1$,
Externí odkaz:
http://arxiv.org/abs/1912.13476
Autor:
Krüger, Olaf
We give a precise connection between combinatorial Dyson-Schwinger equations and log-expansions for Green's functions in quantum field theory. The latter are triangular power series in the coupling constant $\alpha$ and a logarithmic energy scale $L$
Externí odkaz:
http://arxiv.org/abs/1906.06131
Publikováno v:
Phys. Rev. Lett. 123, 131601 (2019)
We analyse the constraints imposed by gauge invariance on higher-order interactions between massless bosonic fields in three-dimensional higher-spin gravities. We show that vertices of quartic and higher order that are independent of the cubic ones c
Externí odkaz:
http://arxiv.org/abs/1905.00093
Publikováno v:
Phys. Rev. D 100, 066019 (2019)
In the context of higher-spin holography, we compare the classification of cubic interaction vertices for higher-spin gravity theories in three dimensions to the possible three-point correlation functions of conserved higher-spin currents in two-dime
Externí odkaz:
http://arxiv.org/abs/1812.10462
Autor:
Küpers, Hanno, Lewis, Ryan B., Tahraoui, Abbes, Matalla, Mathias, Krüger, Olaf, Bastiman, Faebian, Riechert, Henning, Geelhaar, Lutz
Publikováno v:
Nano Res. (2018) 11: 2885
We present a novel two-step approach for the selective area growth (SAG) of GaAs nanowires (NWs) by molecular beam epitaxy which has enabled a detailed exploration of the NW diameter evolution. In the first step, the growth parameters are optimized f
Externí odkaz:
http://arxiv.org/abs/1708.05596
Autor:
Küpers, Hanno, Tahraoui, Abbes, Lewis, Ryan B., Rauwerdink, Sander, Matalla, Mathias, Krüger, Olaf, Bastiman, Faebian, Riechert, Henning, Geelhaar, Lutz
Publikováno v:
Semicond. Sci. Technol. 32 (2017) 115003
The selective area growth of Ga-assisted GaAs nanowires (NWs) with a high vertical yield on Si(111) substrates is still challenging. Here, we explore different surface preparations and their impact on NW growth by molecular beam epitaxy. We show that
Externí odkaz:
http://arxiv.org/abs/1708.02454
Akademický článek
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Autor:
Krüger, Olaf
Publikováno v:
Journal of High Energy Physics 5 (2016) 1-26
The uplift of SO(8) gauged N=8 supergravity to 11-dimensional supergravity is well studied in the literature. It is given by consistent relations between the respective vector and scalar fields of both theories. For example, recent work provided non-
Externí odkaz:
http://arxiv.org/abs/1602.03327
We derive new ansaetze for the 4-form field strength of D=11 supergravity corresponding to uplifts of four-dimensional maximal gauged supergravity. In particular, the ansaetze directly yield the components of the 4-form field strength in terms of the
Externí odkaz:
http://arxiv.org/abs/1507.07684