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Topic Area: Physics

Displaying records 91 to 100 of 763 records.
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91. Demonstrating a High Symmetric Single-Photon Heralding Efficiency in Spontaneous Parametric Downconversion
Topic: Physics
Published: 5/6/2013
Authors: Marcelo Pereira, Francisco E. Becerra Chavez, Boris L. Glebov, Jingyun Fan, Sae Woo Nam, Alan L Migdall
Abstract: We demonstrate a symmetric, single-spatial mode, single-photon heralding efficiency of 84% for a type-II spontaneous parametric downconversion process. This achievement of high efficiency, single-spatial mode collection is key to enabling many quantu ...

92. Individual Ion Addressing with Microwave Field Gradients
Topic: Physics
Published: 4/26/2013
Authors: Ulrich J. Warring, C. Ospelkaus, Yves Colombe, Robert Jordens, Dietrich G Leibfried, David J Wineland
Abstract: Individual-qubit addressing is a prerequisite for many instances of quantum information processing. We present this capability on trapped ions with microwave near-fields delivered by electrode structures integrated into a microfabricated surface-el ...

93. The Biological Evidence Preservation Handbook: Best Practices for Evidence Handlers
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7928
Topic: Physics
Published: 4/23/2013
Authors: Susan M Ballou, Margaret C Kline, Mark David Stolorow, Melissa K Taylor, Shannan R Williams, Phylis S Bamberger, Burney Yvette, Larry Brown, Cynthia E. Jones, Ralph Keaton, William Kiley, Karen Thiessen, Gerry LaPorte, Joseph Latta, Linda E Ledray, Randy Nagy, Linda Schwind, Stephanie Stoiloff, Brian Ostrom
Abstract: The report of the Technical Working Group on Biological Evidence Preservation offers guidance for individuals involved in the collection, examination, tracking, packaging, storing, and disposition of biological evidence. This may include crime sc ...

94. The SIM time scale
Topic: Physics
Published: 4/20/2013
Authors: Michael A Lombardi, J. Mauricio Lopez-Romero, Nelida Diaz-Munoz, E. de Carlos-Lopez
Abstract: Time measurement is of great importance for science, technology and commerce. Among the seven base units of the International System (SI), the second can be realized with the smallest uncertainty, currently reaching parts in 10^u16^. Keeping track of ...

95. Spin transport parameters in metallic multilayers determined by ferromagnetic resonance measurements of spin-pumping
Topic: Physics
Published: 4/19/2013
Authors: Carl Thomas Boone, Hans T. Nembach, Justin M Shaw, Thomas J Silva
Abstract: We measured spin-transport in nonferromagnetic (NM) metallic multilayers from the contribution to damping due to spin pumping from a ferromagnetic Co^d90^Fe^d10^ thin film. The multilayer stack consisted of NM^d1^/NM^d2^/Co^d90^Fe^d10^(2 nm)/NM^d2^/N ...

96. A critical compilation of energy levels, spectral lines, and transition probabilities of singly ionized silver, Ag II
Series: Journal of Research (NIST JRES)
Report Number: 118.009
Topic: Physics
Published: 4/15/2013
Author: Alexander Kramida
Abstract: All available experimental measurements of the spectrum of the Ag+ ion are critically reviewed. Systematic shifts are removed from the measured wavelengths. The compiled list of critically evaluated wavelengths is used to derive a comprehensive l ...

97. Microfabricated Atomic Magnetometers
Topic: Physics
Published: 4/15/2013
Authors: Svenja A Knappe, John E Kitching
Abstract: In this chapter, we discuss miniaturized atomic magnetometers, and the technology and applications relevant to this somewhat unusual direction in magnetometer research and development. By ,miniaturizedŠ, we mean, in addition to their size, magnetomet ...

98. Nuclear magnetic resonance gyroscopes
Topic: Physics
Published: 4/15/2013
Authors: Elizabeth A Donley, John E Kitching
Abstract: This review begins with an introduction to NMR gyroscopes (NMRGs), followed by a discussion of the frequency shifts and relaxation mechanisms that determine and their performance. Specific NMRG implementations are then reviewed, including dual NMR s ...

99. Sympathetic Electromagnetically-Induced-Transparency Laser Cooling of Motional Modes in an Ion Chain
Topic: Physics
Published: 4/12/2013
Authors: Yiheng Lin, John P Gaebler, Ting Rei Tan, Ryan Steven Bowler, John D. Jost, Dietrich G Leibfried, David J Wineland
Abstract: We use electromagnetically-induced transparency (EIT) laser cooling to cool motional modes of a linear ion chain. As a demonstration, we apply EIT cooling on ^u24^Mg^u+^ ions to cool the axial modes of a ^u9^Be^u+^-^u24^Mg^u+^ ion pair and a ^u9^Be^u ...

100. Nonequilibrium dynamics of arbitrary-range Ising models with decoherence: An exact analytic solution
Topic: Physics
Published: 4/3/2013
Authors: John J Bollinger, Michael Foss-Feig, Kaden R. Hazzard, Ana Maria Rey
Abstract: Understanding the interplay between interactions and decoherence in many-body systems is of fundamental importance in quantum physics: Decoherence can degrade correlations, but can also give rise to a variety of rich dynamical and steady-state beha ...

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