Two dimensional photonic crystalsThe topology, the symmetry involving the shape of dielectric cylinders, and the lattice structure are among the most important ingredients in the architecture of photonic crystals. In this paper, we…Pi-Gang Luan, Zhen Ye·May 22, 2001SaveLearn
On topological defect formation in the process of symmetry breaking phase transitionsBy resorting to some results in quantum field theories with spontaneous breakdown of symmetry we show that an explanation based on microscopic dynamics can be given of the fact that topological…E. Alfinito, O. Romei, G. Vitiello·May 22, 2001SaveLearn
Self-trapping transition for nonlinear impurities embedded in a Cayley treeThe self-trapping transition due to a single and a dimer nonlinear impurity embedded in a Cayley tree is studied. In particular, the effect of a perfectly nonlinear Cayley tree is considered. A sharp…Bikash C. Gupta, Sang Bub Lee·May 22, 2001SaveLearn
Topological interpretation of subharmonic mode locking in coupled oscillators with inertiaA topological argument is constructed and applied to explain subharmonic mode locking in a system of coupled oscillators with inertia. Via a series of transformations, the system is shown to be…M. Y. Choi, D. J. Thouless·May 22, 2001SaveLearn
Interaction corrections at intermediate temperatures: I. Longitudinal conductivity and kinetic equationIt is well known that electron-electron interaction in disordered systems leads to logarithmically divergent Altshuler-Aronov corrections to conductivity at low temperatures (Tτ 1; τ is the…Gabor Zala, B. N. Narozhny, I. L. Aleiner·May 21, 2001SaveLearn
Magnon Heat Transport in (Sr,La)14Cu24O41We have measured the thermal heat conductivity kappa of the compounds Sr14Cu24O41 and Ca9La5Cu24O41 containing doped and undoped spin ladders, respectively. We find a huge anisotropy of both,…C. Hess, C. Baumannn, U. Ammerahl et al.·May 21, 2001SaveLearn
Inelastic effects in electron tunneling through water layersCalculations of tunneling matrix elements associated with electron transfer through molecular environments are usually done for given frozen nuclear configurations, assuming that nuclear motions are…Michael Galperin, Abraham Nitzan·May 19, 2001SaveLearn
Geometrical aspects in Equilibrium ThermodynamicsWe discuss different aspects of the present status of the Statistical Physics focusing the attention on the non-extensive systems, and in particular, on the so called small systems.…L. Velazquez, ; F. Guzman·May 18, 2001SaveLearn
Controlled Generation of Dark Solitons with Phase ImprintingThe generation of dark solitons in Bose-Einstein condensates with phase imprinting is studied by mapping it into the classic problem of a damped driven pendulum. We provide simple but powerful…Biao Wu, Jie Liu, Qian Niu·May 18, 2001SaveLearn
Many-Electron Systems with Constrained CurrentA formulation for transport in an inhomogeneous, interacting electron gas is described. Electronic current is induced by a constraint condition imposed as a vector Lagrange multiplier. Constrained…D. S. Kosov, J. C. Greer·May 18, 2001SaveLearn
Synchronization in Scale-free Dynamical Networks: Robustness and FragilityRecently, it has been demonstrated that many large complex networks display a scale-free feature, that is, their connectivity distributions have the power-law form. In this paper, we investigate the…Xiao Fan Wang, Guanrong Chen·May 18, 2001SaveLearn
Some geometrical aspects of the Microcanonical DistributionIn the present work is presented some considerations for a possible generalization of the Microcanonical thermoestatics (M.Th) of D.H.E. Gross.The same reveals a geometric aspect that commonly it has…L. Velazquez, F. Guzman·May 18, 2001SaveLearn
Modulational instability of spinor condensatesWe demonstrate, analytically and numerically, that the ferromagnetic phase of the spinor Bose-Einstein condenstate may experience modulational instability of the ground state leading to a…Nicholas P. Robins, Weiping Zhang, Elena A. Ostrovskaya et al.·May 17, 2001SaveLearn
Interface roughening in Hele--Shaw flows with quenched disorder: experimental and theoretical resultsWe study the forced fluid invasion of an air-filled model porous medium at constant flow rate, in 1+1 dimensions, both experimentally and theoretically. We focus on the non-local character of the…A. Hernandez-Machado, J. Soriano, A. M. Lacasta et al.·May 17, 2001SaveLearn
Designability of lattice model heteropolymersProtein folds are highly designable, in the sense that many sequences fold to the same conformation. In the present work we derive an expression for the designability in a 20 letter lattice model of…G. Tiana, R. A. Broglia, D. Provasi·May 17, 2001SaveLearn
Critical behaviour of fully-frustrated Potts modelsA numerical transfer matrix calculation is presented for two fully-frustrated three-state Potts models on the square lattice: the Potts piled-up-domino model and the Potts zig-zag model. The ground…D P Foster, C Gerard, I Puha·May 16, 2001SaveLearn
"Marginal pinching" in soap filmsWe discuss the behaviour of a thin soap film facing a frame element: the pressure in the Plateau border around the frame is lower than the film pressure, and the film thins out over a certain…Achod Aradian, Elie Raphael, Pierre-Gilles de Gennes·May 16, 2001SaveLearn
Spectral Properties of the k-Body Embedded Gaussian Random EnsemblesSee cond-mat/0010425 and cond-mat/0010426.L. Benet, H. A. Weidenmueller·May 16, 2001SaveLearn
An elastoplastic theory of dislocations as a physical field theory with torsionWe consider a static theory of dislocations with moment stress in an anisotropic or isotropic elastoplastical material as a T(3)-gauge theory. We obtain Yang-Mills type field equations which express…Markus Lazar·May 14, 2001SaveLearn
Mechanical properties and formation mechanisms of a wire of single gold atomsA scanning tunneling microscope (STM) supplemented with a force sensor is used to study the mechanical properties of a novel metallic nanostructure: a freely suspended chain of single gold atoms. We…G. Rubio-Bollinger, S. R. Bahn, N. Agrait et al.·May 14, 2001SaveLearn
Failure of random matrix theory to correctly describe quantum dynamicsConsider a classically chaotic system which is described by a Hamiltonian H0. At t=0 the Hamiltonian undergoes a sudden-change H0 -> H. We consider the quantum-mechanical spreading of the evolving…Tsampikos Kottos, Doron Cohen·May 14, 2001SaveLearn
Spin Electronics and Spin ComputationWe review several proposed spintronic devices that can provide new functionality or improve available functions of electronic devices. In particular, we discuss a high mobility field effect spin…S. Das Sarma, Jaroslav Fabian, Xuedong Hu et al.·May 12, 2001SaveLearn
Quantum Annealing of a Disordered MagnetTraditional simulated annealing utilizes thermal fluctuations for convergence in optimization problems. Quantum tunneling provides a different mechanism for moving between states, with the potential…J. Brooke, D. Bitko, T. F. Rosenbaum et al.·May 11, 2001SaveLearn
Broken-Bond Rule for the Surface Energies of Noble MetalsUsing two different full-potential ab-initio techniques we introduce a simple, universal rule based on the number of broken first-neighbor bonds to determine the surface energies of the three noble…I. Galanakis, G. Bihlmayer, V. Bellini et al.·May 10, 2001SaveLearn
Generalized quasiperiodic Rauzy tilingsWe present a geometrical description of new canonical d-dimensional codimension one quasiperiodic tilings based on generalized Fibonacci sequences. These tilings are made up of rhombi in 2d and…J. Vidal, R. Mosseri·May 10, 2001SaveLearn