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143 papers · 1 filter

physics.atom-ph2009★ 145 cited

Rydberg trimers and excited dimers bound by internal quantum reflection

V. Bendkowsky, B. Butscher, J. Nipper +8

Quantum reflection is a pure wave phenomena that predicts reflection of a particle at a changing potential for cases where complete transmission occurs classically. For a chemical…

physics.optics2009★ 1 cited

Anomalous Light Absorption by Small Particles

Michael I. Tribelsky

A new type of resonant light absorption by a small particle (nanocluster) is reported. The problem cannot be described within the commonly used dipole scattering approximation and…

cond-mat.supr-con2009★ 50 cited

Magnetic impurity resonance states and symmetry of the superconducting order parameter in iron-based superconductors

Alireza Akbari, Ilya Eremin, Peter Thalmeier

We investigate the effect of magnetic impurities on the local quasiparticle density of states (LDOS) in iron-based superconductors. Employing the two-orbital model where 3 elect…

q-bio.NC2009

Are the input parameters of white-noise-driven integrate-and-fire neurons uniquely determined by rate and CV?

Rafael D. Vilela, Benjamin Lindner

Integrate-and-fire (IF) neurons have found widespread applications in computational neuroscience. Particularly important are stochastic versions of these models where the driving c…

q-bio.NC2009★ 83 cited

A comparative study of different integrate-and-fire neurons: spontaneous activity, dynamical response, and stimulus-induced correlation

Rafael D. Vilela, Benjamin Lindner

Stochastic integrate-and-fire (IF) neuron models have found widespread applications in computational neuroscience. Here we present results on the white-noise-driven perfect, leaky,…

cond-mat.mes-hall2009★ 2 cited

Anderson orthogonality catastrophe in realistic quantum dots

Swarnali Bandopadhyay, Martina Hentschel

We study Anderson orthogonality catastrophe (AOC) for an parabolic quantum dot (PQD), one of the experimentally realizable few-electron systems. The finite number of electrons in P…

cond-mat.str-el2009★ 30 cited

Critical Kondo destruction in a pseudogap Anderson model: scaling and relaxational dynamics

Matthew T. Glossop, Stefan Kirchner, J. H. Pixley +1

We study the pseudogap Anderson model as a prototype system for critical Kondo destruction. We obtain finite-temperature (T) scaling functions near its quantum critical point, usin…

cond-mat.supr-con2009★ 24 cited

Unusual disorder effects in superconducting LaFeAs_(1-d)O_0.9F_0.1 as revealed by NMR spectroscopy

F. Hammerath, S. -L. Drechsler, H. -J. Grafe +6

We report 75As NMR measurements of the spin-lattice relaxation in the superconducting state of LaFeAsO_(0.9)F_(0.1) and As-deficient LaFeAs_(1-d)O_0.9F_0.1. The temperature behavio…

cond-mat.quant-gas2009★ 8 cited

Comment on "Coherent Ratchets in Driven Bose-Einstein Condensates"

G. Benenti, G. Casati, S. Denisov +4

C. E. Creffield and F. Sols (Phys. Rev. Lett. 103, 200601 (2009)) recently reported finite, directed time-averaged ratchet current, for a noninteracting quantum particle in a perio…

cond-mat.supr-con2009★ 8 cited

Charge creation and nucleation of longitudinal plasma wave in coupled Josephson junctions

Yu. M. Shukrinov, M. Hamdipour

We study the phase dynamics in coupled Josephson junctions describing by system of nonlinear differential equations. Results of detailed numerical simulations of charge creation in…

cond-mat.mes-hall2009★ 11 cited

Quantum corrections in the Boltzmann conductivity of graphene and their sensitivity to the choice of formalism

Janik Kailasvuori, Matthias C. Lüffe

Semiclassical spin-coherent kinetic equations can be derived from quantum theory with many different approaches (Liouville equation based approaches, nonequilibrium Green's functio…

cond-mat.mtrl-sci2009★ 48 cited

Controllability of ferromagnetism in graphene

Tianxing Ma, Feiming Hu, Zhongbing Huang +1

We systematically study magnetic correlations in graphene within Hubbard model on a honeycomb lattice by using quantum Monte Carlo simulations. In the filling region below the Van…

cond-mat.supr-con2009★ 161 cited

Magnetic degeneracy and hidden metallicity of the spin density wave state in ferropnictides

Ilya Eremin, Andrey V. Chubukov

We analyze spin density wave (SDW) order in iron-based superconductors and electronic structure in the SDW phase. We consider an itinerant model for Fe-pnictides with two hole band…

cond-mat.other2009★ 3 cited

Finite Temperature Properties of a Supersolid: a RPA Approach

A. J. Stoffel, M. Gulacsi

We study in random-phase approximation the newly discovered supersolid phase of He and present in detail its finite temperature properties. He is described within a har…

cond-mat.other2009★ 3 cited

Ground-state Properties of a Supersolid in RPA

A. J. Stoffel, M. Gulacsi

We investigate the newly discovered supersolid phase by solving in random-phase approximation the anisotropic Heisenberg model of the hard-core boson He lattice at zero tempe…

cond-mat.quant-gas2009★ 23 cited

Rotating three-dimensional solitons in Bose Einstein condensates with gravity-like attractive nonlocal interaction

F. Maucher, S. Skupin, M. Sheng +1

We study formation of rotating three-dimensional high-order solitons (azimuthons) in Bose Einstein condensate with attractive nonlocal nonlinear interaction. In particular, we demo…

cond-mat.supr-con2009★ 82 cited

Incommensurate itinerant antiferromagnetic excitations and spin resonance in the FeTeSe superconductor

D. N. Argyriou, A. Hiess, A. Akbari +8

We report on inelastic neutron scattering measurements that find incommensurate itinerant like magnetic excitations in the normal state of superconducting FeTeSe (\…

cond-mat.str-el2009★ 78 cited

Low-temperature properties of the Hubbard model on highly frustrated one-dimensional lattices

O. Derzhko, J. Richter, A. Honecker +2

We consider the repulsive Hubbard model on three highly frustrated one-dimensional lattices -- sawtooth chain and two kagomé chains -- with completely dispersionless (flat) lowest…

cond-mat.stat-mech2009★ 1 cited

Magnetism of Two Coupled Harmonic Oscillators

Mohammed Daoud, Mohamed El Bouziani, Rachid Houca +1

The thermodynamical properties of a system of two coupled harmonic oscillators in the presence of an uniform magnetic field B are investigated. Using an unitary transformation, we…

cond-mat.other2009★ 2 cited

RPA Green's Functions of the Anisotropic Heisenberg Model

Andre Johannes Stoffel, Miklos Gulacsi

We solve in random-phase approximation the anisotropic Heisenberg model, including nearest and next-nearest neighbour interactions by calculating all Green's functions and pair cor…

physics.atom-ph2009★ 276 cited

Dynamical Crystallization in the Dipole Blockade of Ultracold Atoms

T. Pohl, E. Demler, M. D. Lukin

We describe a method for controlling many-body states in extended ensembles of Rydberg atoms, forming crystalline structures during laser excitation of a frozen atomic gas. Specifi…

cond-mat.str-el2009★ 8 cited

Majorana zero modes in graphene with trigonal warping

Balazs Dora, Miklos Gulacsi, Pasquale Sodano

We study the low energy properties of warped monolayer graphene, where the symmetry of the original honeycomb lattice reveals itself. The zero energy solutions are Majorana fermion…

quant-ph2009★ 111 cited

Influence of Complex Exciton-Phonon Coupling on Optical Absorption and Energy Transfer of Quantum Aggregates

Jan Roden, Alexander Eisfeld, Wolfgang Wolff +1

We present a theory that efficiently describes the quantum dynamics of an electronic excitation that is coupled to a continuous, highly structured phonon environment. Based on a st…

physics.atom-ph2009★ 21 cited

Correlations of Rydberg excitations in an ultra-cold gas after an echo sequence

S. Wuster, J. Stanojevic, C. Ates +4

We show that Rydberg states in an ultra-cold gas can be excited with strongly preferred nearest-neighbor distance if densities are well below saturation. The scheme makes use of an…