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Time-dependent density-functional theory beyond the adiabatic approximation: Insights from a two-electron model system
(American Institute of Physics, 2006)
Most applications of time-dependent density-functional theory (TDDFT) use the adiabatic local-density approximation (ALDA) for the dynamical exchange-correlation potential Vxc(r,t). An exact (i.e., nonadiabatic) extension ...
The ground state of a quantum critical system
(arXiv, 2006)
The competition between the tendency of magnetic moments to order at low temperatures, and the tendency of conduction electrons to shield these moments, can result in a phase transition that takes place at zero Kelvin, the ...
Non-Fermi-liquid behavior in Ce(Ru1‑xFex)2Ge2 : Cause and effect
(American Physical Society, 2006)
We present inelastic neutron scattering measurements on the intermetallic compounds Ce(Ru1−xFex)2Ge2 (x=0.65, 0.76, and 0.87). These compounds represent samples in a magnetically ordered phase, at a quantum critical point, ...
Collective excitations in quantum Hall liquid crystals: Single-mode approximation calculations
(American Physical Society, 2006)
A variety of recent experiments probing the low-temperature transport properties of quantum Hall systems have suggested an interpretation in terms of liquid crystalline mesophases dubbed quantum Hall liquid crystals. The ...
The dynamics of superfluid 4He
(arXiv, 2006)
We present neutron scattering results for the dynamic response by superfluid and normal-fluid 4He and the results of a simple perturbation-theory analysis which allows us to describe all aspects of the observed behavior ...
Integral charge quasiparticles in a fractional quantum Hall liquid
(American Physical Society, 2006)
Starting from a collective description of the incompressible fractional quantum Hall liquid as an elastic medium that supports gapped neutral excitations, I show that the one-electron spectral function of this system ...
Coulomb corrections to the extrinsic spin-Hall effect of a two-dimensional electron gas
(American Physical Society, 2006)
We develop the microscopic theory of the extrinsic spin-Hall conductivity of a two- dimensional electron gas, including skew- scattering, side-jump, and Coulomb interaction effects. We find that while the spin-Hall ...
Exchange and correlation effects on the plasmon dispersions and the Coulomb drag in low-density electron bilayers
(arXiv, 2006)
We investigate the effect of exchange and correlation (xc) on the plasmon spectrum and the Coulomb drag between spatially separated low-density two-dimensional electron layers. We adopt a new approach, which employs dynamic ...
The Origins Billions Star Survey: Galactic Explorer
(The Astronomical Society of the Pacific, 2006)
The Origins Billions Star Survey is a mission concept addressing the astrophysics of extrasolar planets, Galactic structure, the Galactic halo and tidal streams, the Local Group and local supercluster of galaxies, dark ...
Propagation of Light in the Field of Stationary and Radiative Gravitational Multipoles
(arXiv, 2006)
Extremely high precision of near-future radio/optical interferometric observatories like SKA, Gaia, SIM and the unparalleled sensitivity of LIGO/LISA gravitational-wave detectors demands more deep theoretical treatment of ...
Laser Ranging Delay in the Bi-Metric Theory of Gravity
(arXiv, 2006)
We introduce a linearized bi-metric theory of gravity with two metrics. The metric g_{ab} describes null hypersurfaces of the gravitational field while light moves on null hypersurfaces of the optical metric \bar{g}_{ab}. ...
Behavior of hexane on graphite at near-monolayer densities: Molecular dynamics study
(American Physical Society, 2006)
We present the results of molecular-dynamics studies of hexane physisorbed onto graphite for eight coverages in the range 0.875⩽ρ⩽1.05 (in units of monolayers). At low temperatures, the adsorbate molecules form a uniaxially ...
On the Speed of Gravity and Relativistic v/c Corrections to the Shapiro Time Delay
(arXiv, 2006)
Recent papers by Samuel [1,2] declared that the linearized post-Newtonian v/c effects are too small to have been measured in the recent experiment involving Jupiter and quasar J0842+1845 [3,4,5] that was used to measure ...
The effacing principle in the post-Newtonian celestial mechanics
(arXiv, 2006)
First post-Newtonian (PN) approximation of the scalar-tensor theory of gravity is used to discuss the effacing principle in N-body system, that is dependence of equations of motion of spherically-symmetric bodies comprising ...
Universality away from critical points in two-dimensional phase transitions
(arXiv, 2006)
The p-state clock model in two dimensions is a system of discrete rotors with a quasi-liquid phase in a region T1 < T < T2 for p > 4. We show that, for p > 4 and above a temperature Teu, all macroscopic thermal averages, ...
Spin-Hall Effect in a [110] GaAs Quantum Well
(American Physical Society, 2006)
A self-consistent treatment of the spin-Hall effect requires consideration of the spin- orbit coupling and electron-impurity scattering on equal footing. This is done here for the experimentally relevant case of a [110] ...
What is the Focus and Emphasis on Calculators in State-Level K-8 Mathematics Curriculum Standards Documents?
(NCSM Journal of Mathematics Education Leadership, 2006)
We conducted our own analysis of official state mathematics curriculum standards documents so that we might understand and describe the extent to which states support use of calculators in elementary and middle school ...
Alternative Sentencing & Strategies for Successful Prisoner Reentry
(University of Missouri - Columbia Institute of Public Policy, 2006)
Nationally, more than two million people are serving time in prison on any given day. Missouri ranks eighth in the nation in terms of imprisonment and has experienced substantial growth in incarceration over the past two ...
Overview of State Government
(University of Missouri - Columbia Institute of Public Policy, 2006)
General overview of the organization of Missouri state government prepared by David C. Valentine for the Missouri Legislative Academy.
Sex Offender Risk Assessment
(University of Missouri - Columbia Institute of Public Policy, 2006)
Compared to clinical methods, actuarial risk instruments are a preferred method to discern sex offenders risk for sexual as well as violent recidivism because, unlike clinical practices, they are considered inexpensive, ...