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Conferences

Active light-shift stabilization in modulated CPT clocks

Author(s)
V Shah, P Schwindt, Vladislav Gerginov, Svenja A. Knappe, Leo W. Hollberg, John E. Kitching
We demonstrate a simple technique to significantly improve the long-term frequency stability in atomic clocks based on coherent population trapping (CPT). In

Stability measurements of the Ca and Yb Optical Frequency Standards

Author(s)
Christopher W. Oates, C Hoyt, Yann Le Coq, Zeb Barber, Tara M. Fortier, Jason Stalnaker, Scott A. Diddams, Leo W. Hollberg
In this paper we describe two types of optical atomic clocks. The first is based on freely expanding calcium atoms and is optimized for experimental simplicity

Absolute Optical Frequency Measurements with a Fractional Uncertainty at 1 x 10-15

Author(s)
Jason Stalnaker, Scott A. Diddams, Leo W. Hollberg, Kyoungsik Kim, Elizabeth A. Donley, Thomas P. Heavner, Steven R. Jefferts, Filippo Levi, Thomas E. Parker, James C. Bergquist, Wayne M. Itano, Marie J. Jensen, Luca Lorini, Windell Oskay, Tara M. Fortier, J Torgerson
We report the technical details specific to our recent measurements of the optical frequency of the mercury single-ion clock in terms of the SI second as

A Local Oscillator for Chip-Scale Atomic Clocks at NIST

Author(s)
Alan Brannon, J Breitbarth, Z Popovic, Vladislav Gerginov, V Shah, Svenja A. Knappe, Leo W. Hollberg, John E. Kitching
We report the first local oscillator (LO) demonstrating viability in terms of performance, size, and power, for chip-scale atomic clocks (CSAC) at the National

Optical and microwave frequency synthesis with an integrated fiber frequency comb

Author(s)
Ingmar Hartl, Martin E. Fermann, William C. Swann, John J. McFerran, Ian R. Coddington, Qudsia Quraishi, Scott Diddams, Nathan R. Newbury, Carston Langrock, Martin M. Fejer, Paul S. Westbrook, Jeffrey W. Nicholson, K Feder
We demonstrate optical coherence over a broad spectral range of two independent fiber frequency combs. Additionally, we demonstrate microwave stability of

TheoH Bias-removal Method

Author(s)
David A. Howe, Jennifer A. Taylor, Tiffany Tassett
A version of Theo1 variance, called TheoBR variance (BR for ''bias-removed'' relative to the Allan variance), is constructed. This relative bias correction is

Relativity and Timing in X-ray Pulsar Navigation

Author(s)
Neil Ashby, David A. Howe
XNAV is a technology demonstration that will use photons from X-ray pulsars for navigation and spacecraft attitude determination. This paper summarizes

Chip-Scale Atomic Devices

Author(s)
John E. Kitching, Svenja A. Knappe, P Schwindt, Ying-ju Wang, Hugh Robinson, Leo W. Hollberg, Li-Anne Liew, John Moreland, Alan Brannon, J Breitbarth, Brad Lindseth, Z Popovic, V Shah, Vladislav Gerginov, Matt Eardley
We present an overview of recent work to develop chip-scale atomic devices such as frequency references and magnetometers. These devices take advantage of

New Collaboration Methods for Laboratory Liaisons

Author(s)
Nancy Allmang, Mylene S. Ouimette, Lea Wade
Three years ago the Information Services Division of the National Institute of Standards and Technology (NIST) initiated a library-laboratory liaison program

Implementing XML Schema Naming and Design Rules

Author(s)
Joshua Lubell, Boonserm Kulvatunyou, Katherine C. Morris, Betty Harvey
We are building a methodology and tool kit for encoding XML schema Naming and Design Rules (NDRs) in a computer-interpretable fashion, enabling automated rule

Selecting Effective Test Messages

Author(s)
Leonard E. Gebase, Roch Bertucat, Robert D. Snelick
One of the first problems that must be addressed when attempting to test the reliability of any software implementation is determining what is to be tested. The

Wrinkling of Ultrathin Polymer Films

Author(s)
Rui Huang, Christopher Stafford, B D. Vogt
This paper presents a bilayer model to account for surface effects on the wrinkling of ultrathin polymer films. Assuming a surface layer of finite thickness

Josephson Junction Materials Research Using Phase Qubits

Author(s)
Raymond Simmonds, Dustin P. Hite, Robert McDermott, Matthias Steffen, Ken B. Cooper, Kristine Lang, John M. Martinis, David P. Pappas
At present, the performance of superconducting qubits is limited by decoherence. Strong decoherence of phase qubits is associated with spurious microwave

Herding Hash Functions and the Nostradamus Attack

Author(s)
John M. Kelsey, Tadayoshi Kohno
In this paper, we develop a new attack on Damgaard-Merkle hash functions, called the herding attack, in which an attacker who can find many collisions on the

Temperature dependence of quantum dot homogeneous linewidth

Author(s)
Joseph J. Berry, Martin Stevens, Richard Mirin, Kevin L. Silverman
We examine the temperature dependence of the ground state homogeneous linewidth in InGaAs/GaAs quantum dots. Measurements are performed on quantum dots in a

Selecting Effective Test Sets

Author(s)
Leonard E. Gebase, Robert D. Snelick, Roch Bertucat
One of the first problems that must be addressed when attempting to test the reliability of any software implementation is determining what is to be tested. The
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