Zobrazeno 1 - 10
of 1 966
pro vyhledávání: '"Richter, Stefan"'
Autor:
Jaksch, Kevin, Dirmeier, Thomas, Weiser, Yannick, Richter, Stefan, Bayraktar, Ömer, Hacker, Bastian, Rösler, Conrad, Khan, Imran, Petscharning, Stefan, Grafenauer, Thomas, Hentschel, Michael, Ömer, Bernhard, Pacher, Christoph, Kanitschar, Florian, Upadhyaya, Twesh, Lin, Jie, Lütkenhaus, Norbert, Leuchs, Gerd, Marquardt, Christoph
Continuous-variable (CV) quantum key distribution (QKD) allows for quantum secure communication with the benefit of being close to existing classical coherent communication. In recent years, CV QKD protocols using a discrete number of displaced coher
Externí odkaz:
http://arxiv.org/abs/2410.12915
Autor:
Aleman, Alexandru, Richter, Stefan
Let $D(\mu)$ denote a harmonically weighted Dirichlet space on the unit disc $\mathbb D$. We show that outer functions $f\in D(\mu)$ are cyclic in $D(\mu)$, whenever $\log f$ belongs to the Pick-Smirnov class $N^+(D(\mu))$. If $f$ has $H^\infty$-norm
Externí odkaz:
http://arxiv.org/abs/2409.20298
Autor:
Katic, Dragoljub, Richter, Stefan
Based on geometrical considerations, we propose a new oscillator for technical market analysis, the tube oscillator. This oscillator measures the trending behavior of a fixed market instrument based on its past history. It is shown in an empirical an
Externí odkaz:
http://arxiv.org/abs/2407.08036
Autor:
Verde, Maurizio, Schaefer, Ansgar, Zenz, Benjamin, Shehata, Zyad, Richter, Stefan, Schmiegelow, Christian T., von Zanthier, Joachim, Schmidt-Kaler, Ferdinand
We study collective light scattering from linear crystals with up to twelve $^{40}\text{Ca}^+$ ions, acting as coherent single photon emitters. Light-scattering is induced by two-photon laser excitation, starting from the S$_{1/2}$ to D$_{5/2}$ quadr
Externí odkaz:
http://arxiv.org/abs/2404.12513
Intensity interferometry is a re-emerging interferometry tool that alleviates some of the challenges of amplitude interferometry at the cost of reduced sensitivity. We demonstrate the feasibility of intensity interferometry with fast single photon co
Externí odkaz:
http://arxiv.org/abs/2303.13265
Let $H^2_d$ be the Drury-Arveson space, and let $f\in H^2_d$ have bounded argument and no zeros in $\mathbb{B}_d$. We show that $f$ is cyclic in $H^2_d$ if and only if $\log f$ belongs to the Pick-Smirnov class $N^+(H^2_d)$. Furthermore, for non-vani
Externí odkaz:
http://arxiv.org/abs/2301.10091
Let $\mathcal{H}$ be a space of analytic functions on the unit ball $\mathbb B_d$ in $\mathbb C^d$ with multiplier algebra $\mathrm{Mult}(\mathcal{H})$. A function $f\in \mathcal{H}$ is called cyclic if the set $[f]$, the closure of $\{\varphi f:\var
Externí odkaz:
http://arxiv.org/abs/2301.04994
Autor:
Richter, Stefan, Sautel, Jesse
Let $d\in \mathbb{N}$ and $f(z)= \sum_{\alpha\in \mathbb{N}_0^d} c_\alpha z^\alpha$ be a convergent multivariable power series in $z=(z_1,\dots,z_d)$. In this paper we present two conditions on the positive coefficients $c_\alpha$ which imply that $f
Externí odkaz:
http://arxiv.org/abs/2208.07349
Jury and Martin establish an analogue of the classical inner-outer factorization of Hardy space functions. They show that every function $f$ in a Hilbert function space with a normalized complete Pick reproducing kernel has a factorization of the typ
Externí odkaz:
http://arxiv.org/abs/2203.08179