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Displaying records 731 to 740 of 777 records.
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731. Tunable spin-spin interactions and entanglement of ions in separate controlled potential wells
Topic: Physics
Published: 8/7/2014
Authors: Andrew C Wilson, Yves Colombe, K. R. Brown, Emanuel H Knill, Dietrich G Leibfried, David J Wineland
Abstract: Inspired by the ideas of Richard Feynman,^d1^ David Deutsch,^d2^ Seth Lloyd^d3^ and others, researchers in the field of quantum information processing and simulation seek to harness the quantum-mechanical properties of well-controlled laboratory sy ...

732. Tunable, stable source of femtosecond pulses near 2 {mu}m via supercontinuum of an Erbium mode-locked laser
Topic: Physics
Published: 11/7/2014
Authors: Andrew M Klose, Gabriel George Ycas, Daniel Isaiah Lutwak Maser, Scott A Diddams
Abstract: Ultrashort pulses of light in the 2 {mu}m region were generated using supercontinuum broadening from an erbium fiber system. The output of a mode-locked erbium oscillator was polarized and used as a seed for a polarization maintaining erbium fiber am ...

733. Tunnel junction sensors for HCI-surface measurements at low kinetic energies
Topic: Physics
Published: 1/25/2013
Authors: Joshua M Pomeroy, Russell Lake
Abstract: In recent years, we have developed and deployed the capability to make and use tunnel junctions sensors (TJS) as extremely sensitive tools for the measurement of surface nanofeatures created by particle surface interactions. Highly charged ion (HCI) ...

734. Two-Way Satellite Time and Frequency Transfer Using 1 MChip/S codes
Topic: Physics
Published: 11/16/2009
Authors: Victor Shufang Zhang, Thomas Edward Parker, Demetrios Matsakis, Joseph Achkar, Daniele Rovera, Dirk Piester, Andreas Bauch, Luca Lorini
Abstract: The Ku-band transatlantic and Europe to Europe two-way satellite time and frequency transfer (TWSTFT) operations used the 2.5 MChip/s pseudo-random codes with 3.5 MHz bandwidth until the end of July, 2009. The cost of TWSTFT operation is associated w ...

735. Ultra-Broadband Frequency Comb Generation in Superconducting Resonators
Topic: Physics
Published: 10/30/2014
Authors: David P Pappas, Michael Robert Vissers, Martin Olof Sandberg, Jiansong Gao, Steven R Jefferts, Robert P Erickson
Abstract: Multi-octave frequency combs are generated in superconducting microresonators due to their low loss, strong Kerrlike kinetic inductance nonlinearity, and low frequency dispersion. This effect is illustrated at low frequency (60 MHz to 20 GHz) in long ...

736. Ultra-Cold Collisions of Atoms and Molecules
Topic: Physics
Published: Date unknown
Author: Paul S Julienne
Abstract: The study of collisions of neutral atoms and molecules at ultralow collision energies is made possible by advances in techniques for cooling and trapping such species. Excellent reviews of laser cooling of atoms are given in the Nobel Lectures of Ch ...

737. Ultra-Low Level Plutonium Isotopes in the NIST SRM 4355A (Peruvian Soil-1)
Topic: Physics
Published: 1/9/2009
Authors: Kenneth G Inn, Jerome LaRosa, Svetlana Nour, James J Filliben, George Brooks, Stephen Lamont, Rob Steiner, Ross Williams, Brad Patton, Debbie Bostick, Gregory Eiden, Steve Petersen, Donna Beals, James Cadieux, Greg Hall, Steve Goldenberg, Stephen Vogt
Abstract: For more than 20 years, countries and their agencies which monitor discharge sites and storage facilities have relied on the National Institute of Standards and Technology (NIST) Standard Reference Material (SRM) 4355 Peruvian Soil reference material ...

738. Ultra-Low-Field NMR Relaxation and Diffusion Measurements Using an Optical Magnetometer
Topic: Physics
Published: 7/31/2014
Authors: John E Kitching, P. Ganssle, H Shin, Scott J Seltzer, Vikram S. Bajaj, Micah P. Ledbetter, Dimitry Budkerl, Svenja A Knappe, A Pines
Abstract: In this work, we have demonstrated for the first time that an alkali vapor cell magnetometer has sufficient sensitivity to chemically resolve a heterogeneous mixture of oil and water by its relaxation and diffusion properties, both in one dimensional ...

739. Ultra-cold mechanical resonators coupled to atoms in an optical lattice
Topic: Physics
Published: 9/17/2009
Authors: Andrew Geraci, John E Kitching
Abstract: We propose an experiment utilizing an array of cooled micro-cantilevers coupled to a sample of ultra-cold atoms trapped near a micro-fabricated surface. The cantilevers allow individual lattice site addressing for atomic state control and readout, an ...

740. Ultra-low noise regenerative frequency divider
Topic: Physics
Published: 11/11/2012
Authors: Archita Hati, Craig W Nelson, Corey Andrew Barnes, Danielle Grace Lirette, Jason A. (Jason) DeSalvo, David Allan Howe
Abstract: We designed ultra-low noise regenerative divider-by-2 circuits that operate at input frequencies of 20 MHz and 10 MHz. We achieved residual output-referred single-sideband phase noise below -162 dBc/Hz at 10 Hz offset for a single divider at these f ...

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