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Displaying 2476 - 2500 of 3361

Atomic Transition Probabilities of AluminumA Critical Compilation

November 14, 2018
Author(s)
Daniel E. Kelleher, Larissa Podobedova
This compilation is the second in a series of updates to Atomic Transition Probabilities, Sodium through Calcium, published in 1969 by W. L. Wiese et al. Atomic transition probabilities have been critically evaluated and compiled for about 5000 spectral

Atomic Transition Probabilities of SiliconA Critical Compilation

November 14, 2018
Author(s)
Daniel E. Kelleher, Larissa Podobedova
This compilation is the third in a series of updates to Atomic Transition Probabilities, Sodium through Calcium, published in 1969 by W. L. Wiese et al. Atomic transition probabilities have been critically evaluated and compiled for about 5800 spectral

Wide Angle Polarization Analysis with Neutron Spin Filters

April 29, 2013
Author(s)
Qiang NMN Ye, Thomas R. Gentile, Jeffrey R. Anderson, Collin L. Broholm, WangChun Chen, Z DeLand, Ross W. Erwin, C. B. Fu, John E. Fuller III, Aaron V. Kirchhoff, J. A. Rodriguez-Rivera, V. Thampy, T G. Walker, Shannon Watson
We report substantial improvements in a compact wide angle neutron spin filter system that was recently employed on the Multi-Axis Crystal Spectrometer at the Center for Neutron Research at the U.S. National Institute of Standards and Technology. The

Nano-Lubrication: Concept and Design

January 1, 2001
Author(s)
Stephen M. Hsu
The advent of micro-electromechanical devices (MEMs), sensors, actuators, microsystems, and nanotechnology have called to attention the effect of friction on moving parts in nano/microdevices. To take full advantage of the opportunity to sense, compute

Advancements in Spintronics

September 25, 2017
Author(s)
Hideo Ohno, Mark D. Stiles, Bernard Dieny
Spintronics is the concept of using the spin degree of freedom to control electrical current to expand the capabilities of electronic devices. Over the last 10 years' considerable progress has been made. This progress has led to technologies ranging from

Calibration of Autler-Townes based electrometry in Rydberg states of alkali atoms

August 30, 2024
Author(s)
Noah Schlossberger, Nikunjkumar Prajapati, Alexandra Artusio-Glimpse, Samuel Berweger, Matthew Simons, William Watterson, Dangka Shylla, Christopher Holloway
Highly excited states of alkali atoms are a powerful tool for making SI-traceable electric field measurements without the need for an external reference. However, the calibration of these measurements suffers from ambiguity in which transition dipole

An Exception to Amontons' Law: The Friction of Carbon Surfaces in Air

February 19, 2017
Author(s)
P M. McGuiggan
The friction of carbon has been of much interest in recent years due to its good tribological properties. These properties include high wear resistance, high hardness, low friction coefficients, and low corrosion. 1 In computer hard disks, the magnetic

Mechanisms for the multistep spin reorientation of ultrathin Fe films on Gd

March 31, 2003
Author(s)
A P. Popov, A. V. Anisimov, David P. Pappas
The multistep spin reorientation transition of ultrathin iron films on bulk gadolinium is described theoretically. We find that it is necessary to include cubic terms in the magnetic anisotropy energy expansion in order to explain this phenomenon

A Well Collimated Quasi-Continuous Atom Laser

March 1, 1999
Author(s)
Edward W. Hagley, Lu Deng, M M. Kozuma, J Wen, Kristian Helmerson, S L. Rolston, William D. Phillips
We demonstrate extraction of sodium atoms from a trapped Bose-Einstein condensate (BEC) using a coherent stimulated Raman process. Optical Raman pulses drive transitions between trapped and untrapped magnetic sublevels so as to give the output coupled BEC

Uncertainty Improvements of the NIST Electronic Kilogram

Author(s)
Richard L. Steiner, Edwin R. Williams, Ruimin Liu, David B. Newell
This paper summarizes the latest uncertainty improvements in the NIST Electronic Kilogram experiment to obtain result of 7 +/- 37 nW/W for the ratio {W 90/W -1} (and the Planck constant), comparable to the NIST 2005 value but with a lower uncertainty. Of

METROLOGY FOR MRI: THE FIELD YOU'VE NEVER HEARD OF

March 19, 2025
Author(s)
Kathryn Keenan, Stephen Russek, Matt Hall
Quantitative MRI has been an active area of research for decades and has produced a huge range of approaches with enormous potential for patient benefit. In many cases, however, there are challenges with reproducibility which has hampered clinical

Phase-resolved electrical detection of coherently coupled magnonic devices

May 20, 2021
Author(s)
Yi Li, Chenbo Zhao, Vivek P. Amin, Zhizhi Zhang, Michael Vogel, Yuzan Xiong, Joseph Sklenar, Ralu Divan, John Pearson, Wei Zhang, Mark D. Stiles, Axel Hoffmann, Valentine Novosad
We demonstrate the electrical detection of a strongly coupled magnon-magnon hybrid system based on yttrium iron garnet/permalloy (YIG/Py) bilayer devices. Direct microwave current injection through the conductive Py layer drives the hybrid dynamics

Quantum simulation and many-body physics with hundreds of trapped ions

September 14, 2013
Author(s)
John J. Bollinger, Joseph W. Britton, Brian C. Sawyer
By employing forces that depend on the internal electronic state (or spin) of an atomic ion, the Coulomb potential energy of a trapped ion crystal can be modified in a spin-dependent way to mimic effective quantum spin Hamiltonians. We use simple models to

Molecular Insights into a-Synuclein and Its N-terminal Peptides at the Membrane Interface

February 1, 2012
Author(s)
Candace M. Pfefferkorn, Frank Heinrich, Alexander J. Sodt, Alexander S. Malstev, Richard W. Pastor, Jennifer C. Lee
The role of phospholipids in modulating α-synuclein (α-syn) conformation is of great interest because α-syn aggregation is linked to Parkinson¿s disease. Using a sparsely tethered-bilayer composed of 1:1 molar ratio of 1-palmitoyl-2-oleoyl-sn-glycero-3

Numerical Study of the Thermodynamics of Clinoatacamite

February 1, 2012
Author(s)
Ehsan Khatami, Joel Helton, Marcos Rigol
In this Brief Report, we discuss the use of linked-cluster expansions in solving quantum models that break certain symmetries of the underlying lattice. We sketch the algorithm for the numerical linked-cluster expansions (NLCEs) and show that although some

Talking Ceramics

November 1, 2002
Author(s)
Terrell A. Vanderah
This is an invited Perspective article describing the technical needs and state-of-the-art research activities in the materials science of microwave ceramics, especially dielectric materials which serve as critical elements in resonators and filters

Driving Phase Slips in a Superfluid Atom Circuit with a Rotating Weak Link

January 10, 2013
Author(s)
Kevin C. Wright, William D. Phillips, Gretchen K. Campbell
We have induced well-defined phase slips between quantized persistent current states around a toroidal atomic 23Na Bose-Einstein condensate by rotating a weak link (a localized region of reduced superfluid density) around the ring at low angular frequency
Displaying 2476 - 2500 of 3361
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