Zobrazeno 1 - 10
of 560
pro vyhledávání: '"Hassan Youssef"'
Autor:
Bothwell, Tobias, Hunt, Benjamin D., Siegel, Jacob L., Hassan, Youssef S., Grogan, Tanner, Kobayashi, Takumi, Gibble, Kurt, Porsev, Sergey G., Safronova, Marianna S., Brown, Roger C., Beloy, Kyle, Ludlow, Andrew D.
In state-of-the-art optical lattice clocks, beyond-electric-dipole polarizability terms lead to a break-down of magic wavelength trapping. In this Letter, we report a novel approach to evaluate lattice light shifts, specifically addressing recent dis
Externí odkaz:
http://arxiv.org/abs/2409.10782
Autor:
Chen, Chun-Chia, Siegel, Jacob L., Hunt, Benjamin D., Grogan, Tanner, Hassan, Youssef S., Beloy, Kyle, Gibble, Kurt, Brown, Roger C., Ludlow, Andrew D.
Publikováno v:
Phys. Rev. Lett. 133, 053401 (2024)
We demonstrate sub-recoil Sisyphus cooling using the long-lived $^{3}\mathrm{P}_{0}$ clock state in alkaline-earth-like ytterbium. A 1388 nm optical standing wave nearly resonant with the $^{3}\textrm{P}_{0}$$\,\rightarrow$$\,^{3}\textrm{D}_{1}$ tran
Externí odkaz:
http://arxiv.org/abs/2406.13782
Autor:
Hassan, Youssef S., Kobayashi, Takumi, Bothwell, Tobias, Seigel, Jacob L., Hunt, Benjamin D., Beloy, Kyle, Gibble, Kurt, Grogan, Tanner, Ludlow, Andrew D.
We demonstrate programmable control over the spatial distribution of ultra-cold atoms confined in an optical lattice. The control is facilitated through a combination of spatial manipulation of the magneto-optical trap and atomic population shelving
Externí odkaz:
http://arxiv.org/abs/2405.20520
Autor:
Siegel, Jacob, McGrew, William, Hassan, Youssef, Chen, Chun-Chia, Beloy, Kyle, Grogan, Tanner, Zhang, Xiaogang, Ludlow, Andrew
We implement coherent delocalization as a tool for improving the two primary metrics of atomic clock performance: systematic uncertainty and instability. By decreasing atomic density with coherent delocalization, we suppress cold-collision shifts and
Externí odkaz:
http://arxiv.org/abs/2402.04968
Autor:
Hussein, Hassan Youssef1, Khalil, Mothana Ali1 med.mu.707070@uoanbar.edu.iq, Majeed, Yasin H.2
Publikováno v:
Al-Anbar Medical Journal. Jun2024, Vol. 20 Issue 1, p62-68. 7p.
Autor:
Kim, May E., McGrew, William F., Nardelli, Nicholas V., Clements, Ethan R., Hassan, Youssef S., Zhang, Xiaogang, Valencia, Jose L., Leopardi, Holly, Hume, David B., Fortier, Tara M., Ludlow, Andrw D., Leibrandt, David R.
Comparisons of high-accuracy optical atomic clocks \cite{Ludlow2015} are essential for precision tests of fundamental physics \cite{Safronova2018}, relativistic geodesy \cite{McGrew2018, Grotti2018, Delva2019}, and the anticipated redefinition of the
Externí odkaz:
http://arxiv.org/abs/2109.09540
Autor:
Abdellatief, Mohamed, Hassan, Youssef M., Elnabwy, Mohamed T., Wong, Leong Sing, Chin, Ren Jie, Mo, Kim Hung
Publikováno v:
In Construction and Building Materials 19 July 2024 436
Publikováno v:
Frontiers in Endocrinology, Vol 15 (2024)
Prostate cancer is the second most commonly diagnosed cancer in men. The mammalian insulin-like growth factor (IGF) family is made up of three ligands (IGF-I, IGF-II, and insulin), three receptors (IGF-I receptor (IGF-1R), insulin receptor (IR), and
Externí odkaz:
https://doaj.org/article/4e48c2359b1140ed981815ebc5b1b0d4
Autor:
Shimaa Abdou Abd El Rahim, Mahmoud Mohamed Arafa, Hassan Youssef Abdelhamid, Adel El-Sayed Ahmed Mohamed
Publikováno v:
SVU-International Journal of Veterinary Sciences, Vol 6, Iss 2, Pp 88-103 (2023)
Zinc Oxide nanoparticles (ZnO-NPs) have promising positive effects on animal performance, feed utilization, antioxidant status, and immune response. This study aimed to evaluate the effects of the ZnO-Nps on some biochemical parameters of male Barki
Externí odkaz:
https://doaj.org/article/2ffbcee7727a4939ae4b62ff7a659a79
Publikováno v:
Eur. Phys. J. Plus (2020) 135:943
We present an analytic method, based on the Bohmian equations for quantum mechanics, for approaching the phase-retrieval problem in the following formulation: By knowing the probability density $\left\vert \psi\left(\overrightarrow{r},t\right)\right\
Externí odkaz:
http://arxiv.org/abs/2011.07063