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Journals

Connecting the Discrete and Continuous-Time Quantum Walks

October 16, 2008

Author(s)

Frederick Strauch

Recently, quantized versions of random walks have been explored as effective elements for quantum algorithms. In the simplest case of one dimension, the theory...

Comments on the Discrete Variable Representation

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 who invoke...

Broadband Optical Comb Generation With a Frequency Modulated Parametric Oscillator

October 16, 2008

Author(s)

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

We introduce a novel broadband optical frequency comb generator consisting of a parametric oscillator with an intracavity electro-optic phase modulator. The...

Straight-edge Diffraction of Planck Radiation

October 16, 2008

Author(s)

Peter J. Mohr, Eric L. Shirley

The irradiance diffraction profile of a straight edge is given as a Taylor series in powers of the distance from the geometrical shadow boundary to any point in...

Surface Effects on Capped and Uncapped Nanocrystals

October 16, 2008

Author(s)

Garnett W. Bryant, W Jaskolski

Surface effects significantly influence the functionality of semiconductor nanocrystals. A theoretical understanding of these effects requires an atomic-scale...

Towards A Simpler Bayesian Guide to the Expression of Uncertainty in Measurement

October 16, 2008

Author(s)

Raghu N. Kacker

The impact of the Guide to Expression of Uncertainty in Measurement is spreading from the national measurement institutes to the industrial measurement...

Rotation-Tunneling Spectrum of Deuterated Ammonia Dimer

October 16, 2008

Author(s)

E N. Karyakin, Gerald T. Fraser, J G. Loeser, R J. Saykally

The millimeter and submillimeter-wave molecular-beam spectrum of the perdeuterated ammonia dimer (ND3)2 has been measured between approximately 50 GHz and 400...

Coupling Effects in Vertically Stacked Double Quantum Dots: Tight-Binding Approach

October 16, 2008

Author(s)

W Jaskolski, M Zielinski, Garnett W. Bryant

Atomic-scale effects on electronic coupling in coupled quantum dots are studied. The empirical tight-binding approach is used to obtain the electronic structure...

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...

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