Results 61 to 70 of about 22,663 (294)

Direct excitation of the forbidden clock transition in neutral 174Yb atoms confined to an optical lattice

, 2006
We report direct single-laser excitation of the strictly forbidden (6s^2)^1S_0 -(6s6p)^3P_0 clock transition in the even 174Yb isotope confined to a 1D optical lattice.
A. Taichenachev, A. V. Taichenachev, C. Hoyt, C. Oates, E. A. Cummings, J. Bergquist, L. Hollberg, L.-S. Ma, V. Yudin, Z. Barber   +9 more
core   +1 more source

Application of Raman and Photoluminescence Spectroscopy to MgO‐C Refractories

Advanced Engineering Materials, EarlyView.
Visible to near infrared luminescence of MgO is studied on MgO‐C bricks and nominally pure MgO powder, with focus on two similar sharp high‐intensity signals, at 699 and 871 nm, each surrounded by symmetrical sidebands. The nature of these sidebands is investigated by temperature‐dependent spectroscopic measurements, confirming phonon involvement by ...
Julia Richter, Felix Drechsler, Till M. J. Stadtmüller, Cameliu Himcinschi, Christos G. Aneziris, Jens Kortus   +5 more
wiley   +1 more source

Ab Initio Derivation of Lattice-Gauge-Theory Dynamics for Cold Gases in Optical Lattices

PRX Quantum, 2023
We introduce a method for quantum simulation of U(1) lattice gauge theories coupled to matter, utilizing alkaline-earth(-like) atoms in state-dependent optical lattices.
Federica Maria Surace, Pierre Fromholz, Nelson Darkwah Oppong, Marcello Dalmonte, Monika Aidelsburger   +4 more
doaj   +1 more source

Spectroscopy of the $^1S_0-{}^3P_0$ Clock Transition of $^{87}$Sr in an Optical Lattice

, 2003
We report on the spectroscopy of the $5s^2 {}^1S_0 (F=9/2) \to 5s5p {}^3P_0 (F=9/2)$ clock transition of ${}^{87}{\rm Sr}$ atoms (natural linewidth of 1 mHz) trapped in a one-dimensional optical lattice. Recoilless transitions with a linewidth of 0.7 kHz
H. Katori, H. Katori, H. Kluge, Hidetoshi Katori, Masao Takamoto, P. S. Jessen, R. H. Dicke, R. W. P. Drever   +7 more
core   +1 more source

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

Advanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios, Anthony Gonzalez, Aleksander Aleman, Tyler Dolmetsch, Tanaji Paul, Arvind Agarwal   +5 more
wiley   +1 more source

The Space Optical Clocks Project: Development of high-performance transportable and breadboard optical clocks and advanced subsystems [PDF]

, 2012
The use of ultra-precise optical clocks in space ("master clocks") will allow for a range of new applications in the fields of fundamental physics (tests of Einstein's theory of General Relativity, time and frequency metrology by means of the comparison ...
Abou-Jaoudeh, C., Alighanbari, S., Barwood, G., Bize, S., Bongs, K., Braxmaier, C., Calonico, D., Donati, A., Falke, S., Franzen, T., Gill, P., Görlitz, A., Holzwarth, R., Kaenders, W., Kulosa, A., Lecomte, S., Levi, F., Lisdat, Ch., Lodewyck, J., Mura, G., Nevsky, A., Ovchinnikov, Y., Poli, N., Rasel, E., Schiller, S., Schioppo, M., Singh, Y., Sterr, U., Stuhler, J., Tino, G. M., Vasilyev, S.   +30 more
core   +5 more sources

Phenomenological and Physically Based Modeling of Flow Stress and Strengthening Mechanism of Inconel 718

Advanced Engineering Materials, EarlyView.
Nickel‐based alloys are widely used in high‐temperature applications due to their excellent mechanical strength and oxidation resistance. However, properties such as high‐temperature strength and pronounced work‐hardening make them difficult to machine.
Soheil Rooein, Oliver Schenk, Christoph Broeckmann   +2 more
wiley   +1 more source

International System of Units-traceable temperature calibration based on optical lattice clocks

Physical Review Research
We present an International System of Units (SI)-traceable temperature calibration apparatus utilizing optical lattice clocks for precision metrology.
Jin Cao, Benquan Lu, Xiaotong Lu, Hong Chang   +3 more
doaj   +1 more source

Hanle Detection for Optical Clocks

The Scientific World Journal, 2015
Considering the strong inhomogeneous spatial polarization and intensity distribution of spontaneous decay fluorescence due to the Hanle effect, we propose and demonstrate a universe Hanle detection configuration of electron-shelving method for optical ...
Xiaogang Zhang, Shengnan Zhang, Duo Pan, Peipei Chen, Xiaobo Xue, Wei Zhuang, Jingbiao Chen   +6 more
doaj   +1 more source

The 87-Sr optical frequency standard at PTB

, 2011
With 87-Sr atoms confined in a one dimensional optical lattice, the frequency of the optical clock transition 5s^2 ^1S_0 - 5s5p ^3P_0 has been determined to be 429 228 004 229 872.9(5) Hz.
Falke, St., Grosche, G., Lipphardt, B., Lisdat, Ch., Middelmann, Th., Riehle, F., Schnatz, H., Sterr, U., Vogt, St., Weyers, S., Winfred, J. S. R. Vellore   +10 more
core   +1 more source