Skip to content

Condensed Matter papers — page 170

cond-matBrowse archive

Theory of magnetic excitations in the Kondo lattice
We present a theory for the spin excitations of the Kondo lattice. We derive an effective Hamiltonian, which describes Fermionic spin 1/2 charge fluctuations interacting with Bosonic triplet spin…
R. EderAug 24, 1998
Learn
Poisoning of Hydrogen Dissociation at Pd (100) by Adsorbed Sulfur Studied by ab initio Quantum Dynamics and ab initio Molecular Dynamics
We report calculations of the dissociative adsorption of H2 at Pd (100) covered with 1/4 monolayer of sulfur using quantum dynamics as well as molecular dynamics and taking all six degrees of…
Axel Gross, Ching-Ming Wei, Matthias SchefflerAug 24, 1998
Learn
Reactions at surfaces studied by ab initio dynamics calculations
Due to the development of efficient algorithms and the improvement of computer power it is now possible to map out potential energy surfaces (PES) of reactions at surfaces in great detail. This…
Axel GrossAug 24, 1998
Learn
Dynamics of a Vortex in Two-Dimensional Superfluid He3-A: Force Caused by the l-Texture
Based on the Landau-Ginzburg Lagrangian, the dynamics of a vortex is studied for superfluid He3-A characterized by the l-texture. The resultant equation of motion for a vortex leads to the…
Hiroshi Kuratsuji, Hiroyuki YabuAug 24, 1998
Learn
Pairing of Fermions with Arbitrary Spin
Motivated by the recent success of optical trapping of alkali Bose condensate, we have studied the superfluid state of optically trapped alkali fermions, which can have Cooper pairs with total spin…
Tin-Lun Ho, Sungkit YipAug 22, 1998
Learn
Cellular Structures for Computation in the Quantum Regime
We present a new cellular data processing scheme, a hybrid of existing cellular automata (CA) and gate array architectures, which is optimized for realization at the quantum scale. For conventional…
S. C. Benjamin, N. F. JohnsonAug 21, 1998
Learn
Chiral Solitons in a Current Coupled Schrödinger Equation With Self Interaction
Recently non-topological chiral soliton solutions were obtained in a derivatively coupled non-linear Schrödinger model in 1+1 dimensions. We extend the analysis to include a more general…
E. Harikumar, C. Nagaraja Kumar, M. SivakumarAug 21, 1998
Learn
Persistent edge current in fractional quantum Hall liquids
The paper has been withdrawn.
Ken-ichiro ImuraAug 20, 1998
Learn
Reptation Quantum Monte Carlo
We present an elementary and self-contained account of the analogies existing between classical diffusion and the imaginary-time evolution of quantum systems. These analogies are used to develop a…
S. Baroni, S. MoroniAug 19, 1998
Learn
Back to basics: historical option pricing revisited
We reconsider the problem of option pricing using historical probability distributions. We first discuss how the risk-minimisation scheme proposed recently is an adequate starting point under the…
Jean-Philippe Bouchaud, Marc PottersAug 19, 1998
Learn
Universal Relationship Between Giant Magnetoresistance and Anisotropic Magnetoresistance in Spin Valve Multilayers
We measure the giant magnetoresistance (GMR) with the current both parallel and perpendicular to the direction of the magnetization in the ferromagnetic (FM) layers and thus probe the anisotropy of…
B. H. Miller, Branko P. Stojkovi'c, E. D. DahlbergAug 18, 1998
Learn
The Computational Complexity of Sandpiles
Given an initial distribution of sand in an Abelian sandpile, what final state does it relax to after all possible avalanches have taken place? In d >= 3, we show that this problem is P-complete, so…
Cristopher Moore, Martin NilssonAug 17, 1998
Learn
Solidity of Viscous Liquids
Recent NMR experiments on supercooled toluene and glycerol by Hinze and Bohmer show that small rotation angles dominate with only few large molecular rotations. These results are here interpreted by…
Jeppe C. DyreAug 17, 1998
Learn
Evidence for Stimulated Scattering of Excitons into Microcavity Polaritons
The wavefunction of a collection of identical quantum particles of integer spin (bosons) is even under exchange of the coordinates of any two of them. This symmetrization rule of quantum mechanics…
F. Tassone, R. Huang, Y. YamamotoAug 14, 1998
Learn
Electron-hole correlation effects in the emission of light from quantum wires
We present a self-consistent treatment of the electron-hole correlations in optically excited quantum wires within the ladder approximation, and using a contact potential interaction. The limitations…
Francesco Tassone, Carlo PiermarocchiAug 14, 1998
Learn
Exciting, Cooling And Vortex Trapping In A Bose-Condensed Gas
A straight forward numerical technique, based on the Gross-Pitaevskii equation, is used to generate a self-consistent description of thermally-excited states of a dilute boson gas. The process of…
R. J. Marshall, G. H. C. New, K. Burnett et al.Aug 13, 1998
Learn
On the Description of Quantum Vortices in Superfluid Films
The dynamics of vortices in a superfluid film at the absolute zero of temperature is studied. The quantum-mechanical, i.e., ``first-quantized'' description is compared to a recently proposed…
Joerg P. Kottmann, Adriaan M. J. SchakelAug 12, 1998
Learn
Having it Both Ways: Distinguishable Yet Phase-Coherent Mixtures of Bose-Einstein Condensates
We have begun a series of experiments on mixed bosonic quantum fluids. Our system is mixed Bose-Einstein condensates in dilute Rb-87. By simultaneously trapping the atoms in two different hyperfine…
E. A. Cornell, D. S. Hall, M. R. Matthews et al.Aug 12, 1998
Learn
Ab Initio Quantum Chemistry using the Density Matrix Renormalization Group
In this paper we describe how the density matrix renormalization group (DMRG) can be used for quantum chemical calculations for molecules, as an alternative to traditional methods, such as…
Steven R. White, Richard L. MartinAug 11, 1998
Learn
Quantum Monte Carlo calculation of Compton profiles of solid lithium
Recent high resolution Compton scattering experiments in lithium have shown significant discrepancies with conventional band theoretical results. We present a pseudopotential quantum Monte Carlo…
Claudia Filippi, David M. CeperleyAug 11, 1998
Learn
Inhomogeneous states in quantum dots. I
In this work we show that the Anderson impurity model applied to ``scar'' wave function may explain large fluctuations of ground state energy of electron gas in a quantum dot.
Daniel L. MillerAug 11, 1998
Learn
Compressibility of electron gas in presence of Anderson's impurity
We employ Wiegmann's solution of the Anderson impurity model in order to compute the compressibility of electron gas. We have found that there is a pair of neighbor levels separated by…
Daniel L. MillerAug 10, 1998
Learn
Numerical simulation of electromagnetic wave scattering from planar dielectric films deposited on rough perfectly conducting substrates
Electromagnetic wave scattering from planar dielectric films deposited on one-dimensional, randomly rough, perfectly conducting substrates is studied by numerical simulations for both p- and…
I. Simonsen, A. A. MaradudinAug 8, 1998
Learn
The Influence of the Bulk Density on the Intergranular Properties of YBa2Cu3-xFexOy (0<x<0.01) Ceramics
The influence of the bulk density of YBa2Cu3-xFexOy (0 < x < 0.01) ceramics on the intergranular superconducting (SC) properties was studied using the temperature dependence of AC magnetic…
S. K. Nikogosyan, A. A. Sahakyan, H. N. Yeritsyan et al.Aug 8, 1998
Learn
Nonadiabatic Geometric Phase and Hannay Angle: A Squeezed State Approach
The geometric phases of the cyclic states of a generalized harmonic oscillator with nonadiabatic time-periodic parameters are discussed in the framework of squeezed state. A class of cyclic states…
Jie Liu, Bambi Hu, Baowen LiAug 8, 1998
Learn
← PreviousPage 170Next →