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Condensed Matter papers — page 91

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Stochastic theory of non-equilibrium wetting
We study a Langevin equation describing non-equilibrium depinning and wetting transitions. Attention is focused on short-ranged attractive substrate-interface potentials. We confirm the existence of…
F. de los Santos, M. M. Telo da Gama, Miguel A. MunozMar 26, 2001
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On the Ground State of Electron Gases at Negative Compressibility
Two- and three-dimensional electron gases with a uniform neutralizing background are studied at negative compressibility. Parametrized expressions for the dielectric function are used to access this…
Adriaan M. J. SchakelMar 26, 2001
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Correlated atomic motion and spin-ordering in bcc 3He
We propose a new way to treat the ordering of nuclear magnetism of solid 3He. We argue that the magnetic interaction arises indirectly as a consequence of correlated zero-point motion of the…
N. Gov, E. PolturakMar 26, 2001
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The Convergence of European Business Cycles 1978-2000
The degree of convergence of the business cycles of the economies of the European Union is a key policy issue. In particular, a substantial degree of convergence is needed if the European Central…
P Ormerod, C MounfieldMar 26, 2001
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Sine-Gordon description of the scaling three-state Potts antiferromagnet on the square lattice
The scaling limit as T->0 of the antiferromagnetic three-state Potts model on the square lattice is described by the sine-Gordon quantum field theory at a specific value of the coupling. We show that…
G. DelfinoMar 26, 2001
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Dynamical turbulent flow on the Galton board with friction and magnetic field
We study numerically and analytically the dynamics of charged particles on the Galton board, a regular lattice of disc scatters, in the presence of constant external force, magnetic field and…
A. D. Chepelianskii, D. L. ShepelyanskyMar 25, 2001
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Bose-Einstein Condensation of Metastable Helium
We have observed a Bose-Einstein Condensate in a dilute gas of 4He in the 23S1 metastable state. We find a critical temperature of (4.70.5) μK and a typical number of atoms at the…
F. Pereira Dos Santos, J. Leonard, Junmin Wang et al.Mar 24, 2001
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Vortex stabilization in a small rotating asymmetric Bose-Einstein condensate
We use a variational method to investigate the ground-state phase diagram of a small, asymmetric Bose-Einstein condensate with respect to the dimensionless interparticle interaction strength γ and…
Marion Linn, Matthias Niemeyer, Alexander L. FetterMar 23, 2001
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Coherent acceleration and Landau-Zener tunneling of Bose-Einstein condensates in 1-D optical lattices
We have loaded Bose-Einstein condensates into one-dimensional, off-resonant optical lattices and accelerated them by chirping the frequency difference between the two lattice beams. For small values…
O. Morsch, J. H. Müller, M. Cristiani et al.Mar 22, 2001
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Magneto-transport Properties near the Superconductor-Insulator Transition in 2D
We analyze here the behavior near the 2D insulator-superconductor quantum critical point in the presence of a perpendicular magnetic field. We show that with increasing field H, the quantum…
Denis Dalidovich, Philip PhillipsMar 21, 2001
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Traversal time for electron tunneling in water
The traversal time for tunneling is a measure of the time during which the transmitted particle can be affected by interactions localized in the barrier. The Buttiker-Landauer approach, which…
Michael Galperin, Abraham Nitzan, Uri PeskinMar 20, 2001
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A relationship between electron transfer rates and molecular conduction
This note discusses the relationship between a given intramolecular bridge assisted electron transfer rate and the corresponding zero bias molecular conduction of the same molecular species.
A. NitzanMar 20, 2001
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Macroscopic quantum tunneling of two-component Bose-Einstein condensates
We show theoretically the existence of a metastable state and the possibility of decay to the ground state through macroscopic quantum tunneling in two-component Bose-Einstein condensates with…
Kenichi Kasamatsu, Yukinori Yasui, Makoto TsubotaMar 19, 2001
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Bose-Einstein condensates in traps of time-dependent topology
Superfluid phenomena can be explained in terms of the topologies of the order parameter and of the confining vessel. For example, currents in a toroidal vessel can be characterized by a discrete and…
Th. Busch, J. R. Anglin, W. H. ZurekMar 19, 2001
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Self-Similar Extrapolation of Asymptotic Series and Forecasting for Time Series
The method of extrapolating asymptotic series, based on the Self-Similar Approximation Theory, is developed. Several important questions are answered, which makes the foundation of the method…
V. I. YukalovMar 19, 2001
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Cooperative Parrondo's Games
We introduce a new family of Parrondo's games of alternating losing strategies in order to get a winning result. In our version of the games we consider an ensemble of players and use…
R. ToralMar 19, 2001
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Exciton trapping in magnetic wire structures
The lateral magnetic confinement of quasi two-dimensional excitons into wire like structures is studied. Spin effects are take into account and two different magnetic field profiles are considered,…
J. A. K. Freire, F. M. Peeters, V. N. Freire et al.Mar 16, 2001
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Three-body recombination into deep bound states in a Bose gas with large scattering length
An effective field theory for the three-body system with large scattering length a is applied to three-body recombination into deep bound states in a Bose gas. The recombination constant αis…
Eric Braaten, H. -W. HammerMar 15, 2001
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Excited States of Ladder-type Poly-p-phenylene Oligomers
Ground state properties and excited states of ladder-type paraphenylene oligomers are calculated applying semiempirical methods for up to eleven phenylene rings. The results are in qualitative…
Joerg Rissler, Florian Gebhard, Peter Schwerdtfeger et al.Mar 15, 2001
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Storage Qubits and Their Potential Implementation Through a Semiconductor Double Quantum Dot
In the context of a semiconductor based implementation of a quantum computer the idea of a quantum storage bit is presented and a possible implementation using a double quantum dot structure is…
E. Pazy, I. D'Amico, P. Zanardi et al.Mar 14, 2001
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Bose beams: coherent propagation through a guide
We compute the stationary profiles of a coherent beam of Bose condensed atoms propagating through a guide. Special emphasis is put on the effect of an obstacle present on the trajectory of the beam.…
P. Leboeuf, N. PavloffMar 14, 2001
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Coulomb drag between a metal and a Wigner crystal
We calculated the Coulomb drag contribution to the resistivity and the transresistivity for a double layer system, in which the passive layer is a Wigner crystal pinned by impurities, and the active…
V. Braude, A. SternMar 14, 2001
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Turbulent Photon Filamentation in Resonant Media
Optical turbulence is the term that is used being based on the analogy between hydrodynamic and optical equations. The phenomenon of turbulent photon filamentation occurs in lasers and other active…
V. I. YukalovMar 14, 2001
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Multiply quantized vortices in trapped Bose-Einstein condensates
Vortex configurations in rotating Bose-Einstein condensed gases trapped in power-law and anharmonic potentials are studied. When the confining potential is steeper than harmonic in the plane…
Emil LundhMar 13, 2001
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Magnetically Stabilized Luminescent Excitations in Hexagonal Boron Nitride
Magnetically stabilized luminescence is observed in hexagonal boron nitride. The luminescence is induced by absorption of cold neutrons and is in the visible region. In the absence of a magnetic…
P. R. Huffman, C. R. Brome, J. S. Butterworth et al.Mar 13, 2001
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