output
19952026
most citedThe virtual crystal approximation revisited: Application to dielectric and piezoelectric properties of perovskites

912 citations

Showing 2008Show all

16 papers · 1 filter

math.GT2008

Manifolds admitting both strongly irreducible and weakly reducible minimal genus Heegaard splittings

Tsuyoshi Kobayashi, Yo'av Rieck

We construct infinitely many manifolds admitting both strongly irreducible and weakly reducible minimal genus Heegaard splittings. Both closed manifolds and manifolds with boundary…

math.CO2008★ 13 cited

Finite planar emulators for K_{4,5} - 4K_2 and K_{1,2,2,2} and Fellows' Conjecture

Yo'av Rieck, Yasushi Yamashita

In 1988 Fellows conjectured that if a finite, connected graph admits a finite planar emulator, then it admits a finite planar cover. We construct a finite planar emulator for K_{4,…

quant-ph2008★ 47 cited

Phase-sensitive Manipulations of Squeezed Vacuum Field in an Optical Parametric Amplifier inside an Optical Cavity

Jing Zhang, Chenguang Ye, Feng Gao +1

Squeezed vacuum field can be amplified or deamplified when it is injected, as the signal beam, into a phase-sensitive optical parametric amplifier (OPA) inside an optical cavity. T…

math.CV2008★ 1 cited

Compactness of the Complex Green Operator on CR-Manifolds of Hypersurface Type

Andrew Raich

The purpose of this article is to study compactness of the complex Green operator on CR manifolds of hypersurface type. We introduce (CR-P_q), a potential theoretic condition on $(…

math.CV2008

-Dirac Operators

Craig A. Nolder, John Ryan

We introduce non-linear Dirac operators in associated to the -harmonic equation and we extend to other contexts including spin manifolds and the sphere.

astro-ph2008★ 18 cited

Absolute properties of the spotted eclipsing binary star CV Bootis

Guillermo Torres, Luiz Paulo R. Vaz, Claud H. Sandberg Lacy

We present new V-band differential brightness measurements as well as new radial-velocity measurements of the detached, circular, 0.84-day period, double-lined eclipsing binary sys…

astro-ph2008★ 13 cited

Infrared Imaging of SDSS Quasars: Implications for the Quasar K correction

Julia Kennefick, Shelly Bursick

We have imaged 45 quasars from the Sloan Digital Sky Survey (SDSS) with redshifts 1.85 < z < 4.26 in JHKs with the KPNO SQIID imager. By combining these data with optical magnitude…

quant-ph2008★ 26 cited

Gate fidelity of arbitrary single-qubit gates constrained by conservation laws

Tokishiro Karasawa, Julio Gea-Banacloche, Masanao Ozawa

Recent investigations show that conservation laws limit the accuracy of gate operations in quantum computing. The inevitable error under the angular momentum conservation law has b…

math.AP2008★ 2 cited

Generalized mean curvature flow in Carnot groups

Luca Capogna, Giovanna Citti

In this paper we study the generalized mean curvature flow of sets in the sub-Riemannian geometry of Carnot groups. We extend to our context the level sets method and the weak (vis…

cond-mat.mtrl-sci2008★ 54 cited

Cooperative response of Pb(ZrTi)O nanoparticles to curled electric fields

Ivan I. Naumov, Huaxiang Fu

Using first-principles based effective Hamiltonian and finite temperature Monte Carlo simulations we investigate cooperative responses, as well as microscopic mechanism for vortex…

cond-mat.mtrl-sci2008★ 11 cited

The structure of electronic polarization and its strain dependence

Yanpeng Yao, Huaxiang Fu

The $ϕ(\kpp)\sim \kpp$ relation is called polarization structure. By density functional calculations, we study the polarization structure in ferroelectric perovskite PbTiO, rev…

astro-ph2008★ 5 cited

A cosmologically motivated description of the dark matter halo profile for the Low Surface Brightness Galaxy, Malin 1

Marc S. Seigar

In this paper we derive a possible mass profile for the low surface brightness galaxy, Malin 1, based upon previously published space-based and ground-based photometric properties…

quant-ph2008★ 40 cited

Observation of lasing without inversion in a hot rubidium vapor under electromagnetically-induced transparency conditions

Haibin Wu, Min Xiao, J. Gea-Banacloche

We have observed CW lasing without inversion in a gas of hot rubidium atoms in an optical cavity under conditions of electromagnetically-induced transparency (EIT). The medium is p…

gr-qc2008★ 28 cited

Computational Efficiency of Frequency-- and Time--Domain Calculations of Extreme Mass--Ratio Binaries: Equatorial Orbits

Jonathan L. Barton, David J. Lazar, Daniel J. Kennefick +2

Gravitational waveforms and fluxes from extreme mass--ratio inspirals can be computed using time--domain methods with accuracy that is fast approaching that of frequency--domain me…

astro-ph2008★ 98 cited

Discovery of a relationship between spiral arm morphology and supermassive black hole mass in disk galaxies

Marc S. Seigar, Daniel Kennefick, Julia Kennefick +1

We present a relationship between spiral arm pitch angle (a measure of the tightness of spiral structure) and the mass of supermassive black holes (BHs) in the nuclei of disk galax…

math.GT2008★ 1 cited

Hyperbolic volume and Heegaard distance

Tsuyoshi Kobayashi, Yo'av Rieck

We prove (Theorem~1.5) that there exists a constant so that if is a -generic complete hyperbolic 3-manifold of volume $\vol[M] < \infty$ and is a Hee…