Results 41 to 50 of about 22,663 (294)
Symmetry-Protected Topological Optical Lattice Clock
PRX QuantumWe theoretically propose a tunable implementation of symmetry-protected topological phases of matter in a synthetic superlattice, taking advantage of the long coherence time and exquisite spectral resolutions offered by gravity-tilted optical lattice ...
Tianrui Xu +6 more
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Laser Cooling of Lanthanides: from Optical Clocks to Quantum Simulators
EPJ Web of Conferences, 2015 We discuss current progress in laser cooling of lanthanides (Er, Yb, Dy, Tm etc.) focusing on applications. We describe some important peculiarities taking Thulium atom as an example: Two stage laser cooling, trapping in an optical lattice, anisotropic ...
Golovizin A. +6 more
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382 mW External-Cavity Frequency Doubling 461 nm Laser Based on Quasi-Phase Matching
Photonics, 2023 To rapidly improve strontium optical clocks, a high-power, high-efficiency, and high-beam-quality 461 nm laser is required. In blue lasers based on periodically poled KTiOPO4 crystals, the optical absorption in the crystals can induce thermal effects ...
Yingxin Chen +3 more
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Elinvar Materials: Recent Progress and Challenges
Advanced Engineering Materials, EarlyView.Elinvar materials, exhibiting temperature‐invariant elastic modulus, are critical for precision instruments and emerging technologies. This article reviews recent progress in the field, with a focus on the anomalous thermoelastic behavior observed in key material systems.
Wenjie Li, Yang Ren
wiley +1 more source
New frequency ratios with a PHz-scale atomic clock
New Journal of Physics, 2016 Atomic clocks are a tour de force when it comes to rigorous tests of measurement. The ultimate validation of one’s careful assessments is to find agreement on a given parameter with a completely independent laboratory.
J J McFerran
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Advanced Engineering Materials, EarlyView.It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti +11 more
wiley +1 more source
Prospective Optical Lattice Clocks in Neutral Atoms with Hyperfine Structure
AtomsOptical lattice clocks combine the accuracy and stability required for next-generation frequency standards. At the heart of these clocks are carefully engineered optical lattices tuned to a wavelength where the differential AC Stark shift between ground ...
Tobias Bothwell
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Nuclear Spin Effects in Optical Lattice Clocks
, 2007 We present a detailed experimental and theoretical study of the effect of nuclear spin on the performance of optical lattice clocks. With a state-mixing theory including spin-orbit and hyperfine interactions, we describe the origin of the $^1S_0$-$^3P_0$
Blatt, Sebastian +6 more
core +2 more sources
Advanced Engineering Materials, EarlyView.Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar +2 more
wiley +1 more source
Reducing the Instability of an Optical Lattice Clock Using Multiple Atomic Ensembles
Physical Review XThe stability of an optical atomic clock is a critical figure of merit for almost all clock applications. To this end, much optical atomic clock research has focused on reducing clock instability by increasing the atom number, lengthening the coherent ...
Xin Zheng +2 more
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