Results 91 to 100 of about 8,346 (279)

Cold collision shift cancelation and inelastic scattering in a Yb optical lattice clock

, 2011
Recently, p-wave cold collisions were shown to dominate the density-dependent shift of the clock transition frequency in a 171Yb optical lattice clock.
Lemke, N. D., Ludlow, A. D., Oates, C. W., Quemener, G., Rey, A. M., Sherman, J. A., von Stecher, J.   +6 more
core   +1 more source

The NIM Sr Optical Lattice Clock

Journal of Physics: Conference Series, 2016
A 87Sr optical lattice clock is built at the National Institute of Metrology (NIM) of China. The atoms undergo two stages of laser cooling before being loaded into a horizontal optical lattice at the magic wavelength of 813 nm. After being interrogated by a narrow linewidth 698 nm clock laser pulse, the normalized excitation rate is measured to get the
Y Lin, Q Wang, Y Li, F Meng, B Lin, E Zang, Z Sun, F Fang, T Li, Z Fang   +9 more
openaire   +1 more source

Impact of Pre‐Oxidation Treatments on a Recycled MgO/Steel‐Composite as Carbon Free Anode in Aluminum‐Electrolysis Environments

Advanced Engineering Materials, EarlyView.
Cermets (60 vol.% AISI 316L stainless steel, 40 vol.% recycled MgO), intended for use in aluminum electrolysis, were pre‐oxidized in three furnaces with different heating technologies and subjected to a cryolite corrosion test. The different atmospheres influenced the formation of oxide layers, which in turn affected corrosion resistance and ...
Patricia Kaiser, Felix Drechsler, Nora Brachhold, Florian Kerber, Christos G. Aneziris   +4 more
wiley   +1 more source

Increased atom-cavity coupling through cooling-induced atomic reorganization

Physical Review Research
The strong coupling of atoms to optical cavities can improve optical lattice clocks as the cavity enables metrologically useful collective atomic entanglement and high-fidelity measurement.
Chi Shu, Simone Colombo, Zeyang Li, Albert Adiyatullin, Enrique Mendez, Edwin Pedrozo-Peñafiel, Vladan Vuletić   +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

Affecting the Properties of Copper–Graphene Electroconductive Composite by Severe Plastic Deformation

Advanced Engineering Materials, EarlyView.
Copper‐based composites enhanced with carbon feature convenient mechanical properties and favorable electric conductivity. Processing via deformation and thermomechanical treatments can introduce advantageous microstructures further enhancing their performance. Herein, copper–graphene powder‐based composites are directly consolidated via rotary swaging
Radim Kocich, Lenka Kunčická, Pavel Czernek, Zifan Wang   +3 more
wiley   +1 more source

Spin Squeezing with Itinerant Magnetic Dipoles

Physical Review X
Entanglement can improve the measurement precision of quantum sensors beyond the shot noise limit. Neutral atoms, the basis of some of the most precise and accurate optical clocks and interferometers, do not naturally exhibit the all-to-all interactions ...
Alec Douglas, Vassilios Kaxiras, Lin Su, Michal Szurek, Vikram Singh, Ognjen Marković, Markus Greiner   +6 more
doaj   +1 more source

Engineering spin squeezing in a 3D optical lattice with interacting spin-orbit-coupled fermions

Physical Review Research, 2019
One of the most important tasks in modern quantum science is to coherently control and entangle many-body systems, and to subsequently use these systems to realize powerful quantum technologies such as quantum-enhanced sensors.
P. He, M. A. Perlin, S. R. Muleady, R. J. Lewis-Swan, R. B. Hutson, J. Ye, A. M. Rey   +6 more
doaj   +1 more source

Collisional losses, decoherence, and frequency shifts in optical lattice clocks with bosons

, 2009
We have quantified collisional losses, decoherence and the collision shift in a one-dimensional optical lattice clock with bosonic 88Sr. The lattice clock is referenced to the highly forbidden transition 1S0 - 3P0 at 698 nm, which becomes weakly allowed ...
Lisdat, Ch., Middelmann, T., Riehle, F., Sterr, U., Winfred, J. S. R. Vellore   +4 more
core   +1 more source

Robust Spot Melting by 3D Spot Arrangements in Electron Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
This work proposes an approach to replace separately melted contours for spot melting in electron beam powder fusion. Adapting the spot arrangements close to the contour combined with stacking yields a comparable surface quality without the inherent challenges of separate contours, as demonstrated, by electron optical images and roughness measurements.
Tobias Kupfer, Lukas Spano, Sebastian Pohl, Carolin Körner, Matthias Markl   +4 more
wiley   +1 more source