10.9k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
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- Joint Institute for Nuclear ResearchRU1.7k papers
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134 papers · 1 filter
Managing the supercell approximation for charged defects in semiconductors: finite size scaling, charge correction factors, the bandgap problem and the ab initio dielectric constant
C. W. M. Castleton, A. Hoglund, S. Mirbt
The errors arising in ab initio density functional theory studies of semiconductor point defects using the supercell approximation are analyzed. It is demonstrated that a) the lead…
Finite size scaling as a cure for supercell approximation errors in calculations of neutral native defects in InP
C. W. M. Castleton, S. Mirbt
The relaxed and unrelaxed formation energies of neutral antisites and interstitial defects in InP are calculated using ab initio density functional theory and simple cubic supercel…
HD 178892 - a cool Ap star with extremely strong magnetic field
T. Ryabchikova, O. Kochukhov, D. Kudryavtsev +6
We report a discovery of the Zeeman resolved spectral lines, corresponding to the extremely large magnetic field modulus <Bs>=17.5 kG, in the cool Ap star HD 178892. The mean longi…
Lie algebroids, Lie groupoids and TFT
Francesco Bonechi, Maxim Zabzine
We construct the moduli spaces associated to the solutions of equations of motion (modulo gauge transformations) of the Poisson sigma model with target being an integrable Poisson…
Hard diffraction -- 20 years later
Gunnar Ingelman
The idea of diffractive processes with a hard scale involved, to resolve the underlying parton dynamics, was published 1985 and experimentally verified 1988. Today hard diffraction…
Li and Be depletion in metal-poor subgiants
A. E. García Pérez, F. Primas
A sample of metal-poor subgiants has been observed with the UVES spectrograph at the Very Large Telescope and abundances of Li and Be have been determined. Typical signal-to-noise…
Oxygen abundances in metal-poor subgiants as determined from [O I], O I and OH lines
A. E. García Pérez, M. Asplund, F. Primas +2
The debate on the oxygen abundances of metal-poor stars has its origin in contradictory results obtained using different abundance indicators. To achieve a better understanding of…
Antiferromagnetic Operators in N=4 Supersymmetric Yang-Mills Theory
K. Zarembo
The spectrum of operators in the su(2) sector of N=4 SYM is bounded because the number of operators is finite. According to the AdS/CFT correspondence, the string spectrum in this…
Supersymmetry Parameter Analysis: SPA Convention and Project
J. A. Aguilar-Saavedra, A. Ali, B. C. Allanach +122
High-precision analyses of supersymmetry parameters aim at reconstructing the fundamental supersymmetric theory and its breaking mechanism. A well defined theoretical framework is…
Phase structure of an Abelian two-Higgs model and high temperature superconductors
M. N. Chernodub, E. -M. Ilgenfritz, A. Schiller
We study the phase structure of a three dimensional Abelian Higgs model with singly- and doubly-charged scalar fields coupled to a compact Abelian gauge field. The model is pretend…
Noncyclic geometric changes of quantum states
David Kult, Johan Åberg, Erik Sjöqvist
Non-Abelian quantum holonomies, i.e., unitary state changes solely induced by geometric properties of a quantum system, have been much under focus in the physics community as gener…
Jet Quenching from soft QCD Scattering in the Quark-Gluon Plasma
Korinna Zapp, Gunnar Ingelman, Johan Rathsman +1
We show that partons traversing a quark-gluon plasma can lose substantial amounts of energy also by scatterings, and not only through medium-induced radiation as mainly considered…
Embedded monopoles in quark eigenmodes in SU(2) Yang-Mills Theory
M. N. Chernodub, S. M. Morozov
We study the embedded QCD monopoles (``quark monopoles'') using low-lying eigenmodes of the overlap Dirac operator in zero- and finite-temperature SU(2) Yang-Mills theory on the la…
Hedgehogs in Wilson loops and phase transition in SU(2) Yang-Mills theory
V. A. Belavin, M. N. Chernodub, I. E. Kozlov
We suggest that the gauge-invariant hedgehoglike structures in the Wilson loops are physically interesting degrees of freedom in the Yang--Mills theory. The trajectories of these `…
Coherent bremsstrahlung, coherent pair production, birefringence and polarimetry in the 20-170 GeV energy range using aligned crystals
NA59 Collaboration, A. Apyan, R. O. Avakian +27
The processes of coherent bremsstrahlung (CB) and coherent pair production (CPP) based on aligned crystal targets have been studied in the energy range 20-170 GeV. The experimental…
The design and performance of the Gaia photometric system
C. Jordi, E. Hoeg, A. G. A. Brown +32
The European Gaia astrometry mission is due for launch in 2011. Gaia will rely on the proven principles of ESA's Hipparcos mission to create an all-sky survey of about one billion…
Inflation as a probe of new physics
Ulf H. Danielsson
In this paper we consider inflation as a probe of new physics near the string or Planck scale. We discuss how new physics can be captured by the choice of vacuum, and how this lead…
Measurement of the Isolated Photon Cross Section in p-pbar Collisions at sqrt{s}=1.96 TeV
D0 Collaboration
The cross section for the inclusive production of isolated photons has been measured in p anti-p collisions at sqrt{s}=1.96 TeV with the D0 detector at the Fermilab Tevatron Collid…
Magnetic interactions of supported magnetic clusters
Anders Bergman, Lars Nordstrom, Angela Burlamaqui Klautau +2
It is demonstrated that the magnetic interactions can be drastically different for nano-sized systems compared to those of bulk or surfaces. Using a real-space formalism we have de…
Non-equilibrium Magnetic Properties of Single Crystalline La0.7Ca0.3CoO3
Asish K. Kundu, P. Nordblad, C. N. R. Rao
Magnetic and electric properties of a single crystal of La0.7Ca0.3CoO3 have been experimentally studied. The system attains a ferromagnetic spontaneous moment below 170 K and exhib…
On presentations of Brauer-type monoids
Ganna Kudryavtseva, Volodymyr Mazorchuk
We obtain presentations for the Brauer monoid, the partial analogue of the Brauer monoid, and for the greatest factorizable inverse submonoid of the dual symmetric inverse monoid.…
Ground state alternative for p-Laplacian with potential term
Y. Pinchover, K. Tintarev
Let be a domain in , , and . Fix . Consider the functional and its Gâteaux derivative given b…
Current driven magnetization dynamics in helical spin density waves
Ola Wessely, Bjorn Skubic, Lars Nordstrom
A mechanism is proposed for manipulating the magnetic state of a helical spin density wave using a current. In this paper, we show that a current through a bulk system with a helic…
Non-equilibrium triplet blockade in parallel coupled quantum dots
J. Fransson
It is demonstrated that parallel weakly coupled quantum dots exhibit non-equilibrium blockade regimes caused by a full occupation in the spin triplet state, in analogy to the Pauli…