U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 18326 - 18350 of 73868

Fractional Quantum Hall States of Rydberg Polaritons

March 31, 2015
Author(s)
Mohammad F. Maghrebi, Norman Y. Yao, Mohammad Hafezi, Thomas Pohl, Ofer Firstenberg, Alexey Gorshkov
We propose a scheme for realizing fractional quantum Hall states of light. In our scheme, photons of two polarizations are coupled to Rydberg atoms via auxiliary classical control fields to form two flavors of Rydberg polaritons, effective spin up and spin

Risk-Informed Performance-Based Design Concepts and Framework

March 31, 2015
Author(s)
Brian J. Meacham, Alberto Alvarez-Rodriguez
A new framework for a risk-informed performance-based approach to fire safety analysis and design has been proposed. It is structured around a paradigm in which the performance analysis is conducted relative to the performance of a building-occupant system

Considerations for Identity Management in Public Safety Networks

March 30, 2015
Author(s)
Nelson Hastings, Joshua M. Franklin
This document analyzes approaches to identity management for public safety networks in an effort to assist individuals developing technical and policy requirements for public safety use. These considerations are scoped into the context of their

CONTAM To EnergyPlus Infiltration Features of the CONTAM Results Export Tool

March 30, 2015
Author(s)
Brian J. Polidoro, Lisa C. Ng, William S. Dols, Steven J. Emmerich, Andrew K. Persily
As building envelope performance and HVAC equipment efficiencies continue to be improved to reduce building energy use, a greater percentage of the total energy loss of a building can occur through envelope leakage. Although the energy impacts of

Magic wavelengths for the 5s-18s transition in rubidium

March 30, 2015
Author(s)
Elizabeth A. Goldschmidt, Roger C. Brown, James V. Porto, Robert Wyllie, Silvio B. Koller, M S. Safronova, Ulyana I. Safronova, David Norris
Magic wavelengths, for which there is no differential ac Stark shift for the ground and excited state of the atom, allow trapping of excited Rydberg atoms without broadening the optical transition. This is an important tool for implementing quantum gates

Positive Operator-Valued Measure reconstruction of a beam-splitter tree based photon-number- resolving detector

March 30, 2015
Author(s)
Sergey V. Polyakov, Fabrizio Piacentini, Filippo Levi, A Avella, M Lopez, Stefan Kuck, Ivo P. Degiovanni, Giorgio Brida, Marco Genovese
Here we present a reconstruction of the Positive Operator-Value Measurement of a photon-number-resolving detector comprised of three 50:50 beamsplitters in a tree configuration, terminated with four single-photon avalanche detectors.

Assessing Effects of Asymmetries, Dynamics, and Failures on a Cloud Simulator

March 29, 2015
Author(s)
Kevin L. Mills, James J. Filliben, Christopher E. Dabrowski
We characterize the effects of asymmetries, dynamics, and failures when introduced into a cloud computing simulator, which had previously been characterized under static, homogeneous configurations with various patterns of demand and supply. We aim to

Calibration of thin-film platinum sensors for use in the JILA Sr II Clock

March 29, 2015
Author(s)
Weston L. Tew, Travis L. Nicholson, Ross B. Hutson
A set two pairs of thin-film platinum resistance thermometers (TFPRTs) have been calibrated on the International Temperature Scale of 1990 (ITS-90) for the purposes of determining temperatures inside the JILA Sr II Optical Lattice Clock vacuum chamber. The

Exponential scaling of clock stability with atom number

March 28, 2015
Author(s)
Till P. Rosenband, David R. Leibrandt
In trapped-atom clocks, the primary source of decoherence is often the phase noise of the oscillator. In this case, it is theoretically possible to derive exponential performance gains by combining several atomic ensembles. For example, M ensembles of N

Interactions of Microorganisms with Polymer Nanocomposites Containing Different Loadings of Oxidized Single and Multi-walled Carbon Nanotubes

March 27, 2015
Author(s)
David G. Goodwin , Kris M. Marsh, Iruhany B. Sosa, Julianne B. Payne, Justin Gorham, Edward J. Bouwer, D H. Fairbrother
The environmental fate and impact of polymer nanocomposites (PNCs) containing carbon nanotubes (CNTs) will depend upon their interactions with microorganisms, with implications for the antimicrobial properties and long term persistence of PNCs. Using

A Fundamental Equation of State for 1,1,1,3,3-Pentafluoropropane (R-245fa)

March 26, 2015
Author(s)
Ryo Akasaka, Yong Zhou, Eric Lemmon
A new fundamental equation of state explicit in the Helmholtz energy is presented for 1,1,1,3,3 pentafluoropropane (R 245fa), based on recent experimental data for the vapor pressures, densities, and vapor sound speeds. The functional form now uses

Design Challenges of the NIST Net Zero Energy Residential Test Facility

March 26, 2015
Author(s)
Betsy Pettit, Cathy Gates, Arthur H. Fanney, William M. Healy
Homeowners and builders have increasingly strived to build low energy use and environmentally friendly homes. As materials and equipment have improved, energy reduction as a goal has increasingly been replaced with the goal of net-zero energy use. But the

Draining Test Measures and Provers

March 26, 2015
Author(s)
Gloria D. Lee
This article reviews the correct procedures for draining 5-gallon test measures and truck mounted provers, frequently asked questions concerning the test procedures for draining test measures and provers, and provides information on additional training
Displaying 18326 - 18350 of 73868
Was this page helpful?