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Journals

Infrared Spectrum and Revised Energy Levels for Neutral Krypton

October 16, 2008

Author(s)

Craig J. Sansonetti, Marion Greene

We observed the spectrum of neutral krypton (Kr I) in its naturally occurring isotopic mixture as emitted by a microwave-excited electrodeless discharge lamp...

Infrared Synchrotron Radiation from Charged Particles Accelerated by a Confined Region of Magnetic Field

October 16, 2008

Author(s)

Ping-Shine Shaw

A new theoretical approach for treating the synchrotron radiation is applied to the case of a relativistic charged particle accelerated by a confined and...

Charge, Spin, and Lattice Excitations in Double-Layer Manganites

October 16, 2008

Author(s)

D B. Romero, H D. Drew, J.F. Mitchell, Y Moritomo

A Raman-scattering investigation of the double-layer manganites, La 2-2rSr 1+2rMn 2O 7 (x= 0.4,0.5), revealed signatures of a ) charge stripe formation and...

International Comparisons of Absolute Gravimeters - Their Relevance for Vertical Displacement Monitoring

October 16, 2008

Author(s)

J E. Faller

Insrument capabilities have evolved over the past 40 or so years to the point where, today, both relative and absolute measurements can nowbe made. at the parts...

Discrete Variable Representations for Singular Hamiltonians

October 16, 2008

Author(s)

B I. Schneider, N Nygaard

We discuss the application of the Discrete Variable Representation to Schr dinger problems which involve singular Hamiltonians. Unlike recent authors which...

Interaction Effects in Optically Dense Materials

October 16, 2008

Author(s)

Steven T. Cundiff, J M. Shacklette, Virginia O. Lorenz

The properties of optically dense materials are influenced by interactions between elementary optical excitations. Since such interactions are absent in the...

Excitations, Optical Absorption Spectra, and Optical Excitonic Gaps of Heterofullerenes: I. C₆₀, C₅₉N⁺ and C₄₈N₁₂

October 16, 2008

Author(s)

Rui-Hua Xie, Garnett W. Bryant, G Sun, M C. Nicklaus, V H. Smith, Y Araki, O Ito

Low-energy excitations and optical absorption spectrum of C 60 are computed by using time-dependent (TD) density functional theory (DFT). A detailed comparison...

A Modified Wigner's Inequality for Secure Quantum Key Distribution

October 16, 2008

Author(s)

Stefania Castelletto, Ivo P. Degiovanni, M L. Rastello

In this letter we discuss the insecurity with present implementations of the Ekert protocol for quantum-key distribution based on the Wigner Inequality. We...

Nanotechnology Research of NIST Scientists at JILA

October 16, 2008

Author(s)

S R. Leone

NIST scientists participate in a variety of nanotechnology activities, several of which are summarized here. The drive toward both ever-smaller integrated...

High Resolution X-ray Scattering Methods for ULSI Materials Characterization and Metrology for ULSI Technology

October 16, 2008

Author(s)

R J. Matyi

X-ray analytical methods with high angular resolution are becoming increasingly important for the characterization of materials used in ULSI fabrication...

Lifshitz-Like Transition and Enhancement of Correlations in a Rotating Bosonic Ring Lattice

October 16, 2008

Author(s)

A M. Rey, Karen G. Burnett, Indubala I. Satija, Charles W. Clark

We study the effects of rotation on one-dimensional ultra-cold bosons confined to a ring lattice. For commensurate systems, at a critical value of the rotation...

Intercomparisions of Reflectance Measurements

October 16, 2008

Author(s)

P Y. Barnes, B. Carol Johnson, James J. Butler, C J. Bruegge, S F. Biggar, P R. Spyak, M M. Pavlov, E A. Early

A comparison of spectral diffuse reflectance between different national standards laboratories is being planned under the direction of the Comit* Consultatif de...

Resummation in the Doubly-Cut Borel Plane: The LoSurdo-Stark Effect

October 16, 2008

Author(s)

U Jentschura

The divergent perturbation series for the LoSurdo--Stark effect has purely real coefficients. By contrast, the energy eigenvalue of the quasistationary states...

Large Scale MCHF Calculation of the Li I 4d-4f Energy Difference

October 16, 2008

Author(s)

C F. Fischedr, Y Ralchenko

The calculational methods in atomic structure are currently capable of providing the level of accuracy close to that of the most precise experiments. The...

A Structural Study of Ethylbenzene and a Conformational Study of N-Propylbenzene and n-Butylbenzene

October 16, 2008

Author(s)

B Mate, R D. Suenram, C Lugez

The rotational spectra of ethyl, n-propyl and n-butylbenzene have been observed and analyzed using a high-resolution Fourier transform microwave spectrometer...

Cone Emission Theory

October 16, 2008

Author(s)

B D. Paul, J W. Cooper, Alan Gallagher, M G. Raymer

A time-dependent theory of cone emission for near-resonant propagation of laser light in an atomic vapor is presented which includes full propagation for the...

Formation Dynamics of Layer-by-Layer Self-Assembled Films probed by Second Harmonic Generation

October 16, 2008

Author(s)

M Breit, M Gao, G von Plessen, U Lemmer, J Feldmann, S T. Cundiff

We investigate the formation dynamics of self-assembled polyelectrolyte multilayers on glass substrates by in situ and ex situ second harmonic generation (SHG)...

Amphiphilic Block Copolymer Nanotubes and Vesicles Stabilized byPhotopolymerization

October 16, 2008

Author(s)

Ana Jofre, John B. Hutchison, Laurie E. Locascio, Kristian Helmerson

Photopolymerization is implemented to crosslink and stabilize vesicles and nanotubes composed of amphiphilic block copolymer chains. Stabilized membranes of...

Comment on Nonlinear Band Structure in Bose-Einstein Condensates: Nonlinear Schroedinger Equation With a Kronig Penney Potential

October 16, 2008

Author(s)

Ippei Danshita, S Tsuchiya

In their recent paper [Phys. Rev. A 71, 033622], B. T. Seaman et al. studied Bloch states of the condensate wave function in a Kronig-Penney potential and...

Spectral Power and Irradiance Response Calibration of InSb Working Standard Radiometers

October 16, 2008

Author(s)

George P. Eppeldauer, M Racz

Fires and second generation InSb radiometers have been developed and characterized to hold the National Institute of Standards and Technology (NIST) spectral...

Reference Wavelengths for Strong Lines of Atomic Hydrogen and Deuterium

October 16, 2008

Author(s)

Joseph Reader

Wavelengths of the individual fine-structure components of the n=1-2(Ly alpha), n=1-3(Ly beta), n=1-4(Ly gamma), n=1-5(Ly delta), n=1-6(Ly epsilon), n=1-7(Ly xi...

Two-Photon and EIT-Assisted Doppler Cooling in a Three-Level Cascade System

October 16, 2008

Author(s)

Giovanna Morigi, E Arimondo

Laser cooling processes are theoretically investigated for a cascade scheme where the upper state decays more slowly than the intermediate one. A laser coupling...

Prospects for a Truly Portable Absolute Gravimeter

October 16, 2008

Author(s)

J E. Faller, A L. Vitouchkine

Absolute gravity measurements offer teh possibility of measuring vertical height changes (the subject of this meeting) at the centimeter level. Today's absolute...

New Working Standards to Disseminate NIST Radiometric and Photometric Scales

October 16, 2008

Author(s)

George P. Eppeldauer, Richard Austin, Charles Lustenberger

A new generation radiometer-photometer system has been developed in a National Institute of Standards and Technology (NIST) and Gamma Scientific (GS)...

Traceability in Nuclear Medicine

October 16, 2008

Author(s)

Brian E. Zimmerman, Steven Judge

Accurate, reproducible measurement of radioactivity in nuclear medicine applications is vital to ensuring the safety and effectiveness of disease diagnosis and...

Reliable Control of Josephson Phase Qubits

October 16, 2008

Author(s)

M Steffen, J M. Martinis, Isaac C. Chuang

A quantum bit is a closed two-dimensional Hilbert space, but often experimental systems have three or more energy levels. In a Josephson phase qubit the energy...

Coupled Macroscopic Quantum Resonators: Entanglement and Squeezed State

October 16, 2008

Author(s)

Lin Tian, Raymond Simmonds

Linear coupling between solid-state quantum resonators generates entanglement and squeezing effectively. We study the coupled system of a nanomechanical...

Enhanced Sensitivity to Variation of m_e/m_p in Molecular Spectra

October 16, 2008

Author(s)

D DeMille, S Sainis

We propose new experiments with high sensitivity to a variation in the electron-to-proton mass ratio \mu=me/mp. We consider a close pair of molecular...

Correcting Low Frequency Noise With Continuous Measurement

October 16, 2008

Author(s)

Lin Tian

Low frequency noise presents a serious source of decoherence in solid- state qubits. When combined with a continuous weak measurement of the eigenstates of a...

Ultrasensitive detection of weak resonances--application to optical frequency standards

October 16, 2008

Author(s)

Jun Ye, L -. Ma, John L. Hall

We present our latest results on the ultrasensitive molecular overtone spectroscopy using the cavity-enhanced frequency modulation (FM) technique. The principle...

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