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Condensed Matter papers — page 5

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Full Counting Statistics of Spin Currents
We discuss how to detect fluctuating spin currents and derive full counting statistics of electron spin transfers. It is interesting to consider several detectors in series that simultaneously…
Antonio Di Lorenzo, Yuli V. NazarovDec 1, 2003
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Optical pumping NMR in the compensated semiconductor InP:Fe
The optical pumping NMR effect in the compensated semiconductor InP:Fe has been investigated in terms of the dependences of photon energy (Ep), helicity (sigma+-), and exposure time (tauL) of…
Atsushi Goto, Kenjiro Hashi, Tadashi Shimizu et al.Dec 1, 2003
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Non-saturating magnetoresistance in heavily disordered semiconductors
The resistance of a homogeneous semiconductor increases quadratically with magnetic field at low fields and, except in very special cases, saturates at fields much larger than the inverse of the…
M. M. Parish, P. B. LittlewoodDec 1, 2003
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Sub- and Supersonic Heat Motion Induced by Femtosecond Laser Pulses
In this paper the superheating of electron plasma by femtosecond laser pulses is investigated. With Heaviside thermal equation (Lasers in Engineering, 12, (2002), p.17) the generation of superhot…
J. Marciak-Kozlowska, M. KozlowskiNov 28, 2003
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Breakup of the Hydrogen Bond Network In Water:The Momentum Distribution of the Protons
Neutron Compton Scattering measurements presented here of the momentum distribution of hydrogen in water at temperatures slightly below freezing to the supercritical phase show a dramatic change in…
G. Reiter, T. Abdul-Redah, J. C. LI et al.Nov 27, 2003
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Temperature dependent Bogoliubov approximation in the classical fields approach to weakly interacting Bose gas
A classical fields approximation to the finite temperature microcanonical thermodynamics of weakly interacting Bose gas is applied to the idealized case of atoms confined in a box with periodic…
Miroslaw Brewczyk, Peter Borowski, Mariusz Gajda et al.Nov 27, 2003
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The evolutionary minority game with local coordination
We discuss a modification of the Evolutionary Minority Game (EMG) in which agents are placed in the nodes of a regular or a random graph. A neighborhood for each agent can thus be defined and a…
E. Burgos, Horacio Ceva, R. P. J. PerazzoNov 27, 2003
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Correlations in interfering electrons irradiated by nonclassical microwaves
Electron interference in mesoscopic devices irradiated by external non-classical microwaves, is considered. In the case of one-mode microwaves, it is shown that both the average intensity and the…
C. C. Chong, D. I. Tsomokos, A. VourdasNov 26, 2003
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Atomic and molecular matter fields in periodic potentials
This paper deals with the conversion between atoms and molecules in optical lattices. We show that in the absence of collisional interaction, the atomic and molecular components in different lattice…
Klaus MolmerNov 26, 2003
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Non-equilibrium Born-Oppenheimer potential energy surfaces for molecular wires
We present a method for computing non-equilibrium, current-dependent Born-Oppenheimer potential energy surfaces for molecular wires. Calculations are performed for polyacetylene wire described by…
D. S. KosovNov 26, 2003
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The duration of recessions follows an exponential not a power law
Ormerod and Mounfield analysed GDP data of 17 leading capitalist economies from 1870 to 1994 and concluded that the frequency of the duration of recessions is consistent with a power-law. But in fact…
Ian WrightNov 25, 2003
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Manipulating the superfluid - Mott insulator transition of a Bose - Einstein condensate in an amplitude - modulated optical lattice
The superfluid - Mott insulator transition in a BEC confined in an amplitude - modulated optical lattice can be manipulated by the modulation strength. Two standing laser waves of main and sideband…
G. M. GenkinNov 25, 2003
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Direct measure of the exciton formation in quantum wells from time resolved interband luminescence
We present the results of a detailed time resolved luminescence study carried out on a very high quality InGaAs quantum well sample where the contributions at the energy of the exciton and at the…
J. Szczytko, L. Kappei, J. Berney et al.Nov 25, 2003
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Cure to the Landau-Pomeranchuk and Associated Long-Wavelength Fermi-surface Instabilities on Lattices
The cure to the =1 Landau-Pomeranchuk (L-P) instabilities in translationally invariant fermions is shown to be a state with an anisotropic gap at the fermi-surface. For higher and for…
C. M. VarmaNov 25, 2003
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Dissipation in Nanocrystalline-Diamond Nanomechanical Resonators
We have measured the dissipation and frequency of nanocrystalline-diamond nanomechanical resonators with resonant frequencies between 13.7 MHz and 157.3 MHz, over a temperature range of 1.4-274 K.…
A. B. Hutchinson, P. A. Truitt, K. C. Schwab et al.Nov 24, 2003
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Simulating spin-boson dynamics with stochastic Liouville-von Neumann equations
Based on recently derived exact stochastic Liouville-von Neumann equations, several strategies for the efficient simulation of open quantum systems are developed and tested on the spin-boson model.…
J. T. StockburgerNov 24, 2003
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Spin-dependent transport in lateral periodic magnetic modulations: a novel scheme for spin filters
A novel scheme for spin filters is proposed by studying the coherent transport of electrons through the quantum wires with lateral magnetic modulations. Unlike other schemes in the literature, the…
J. Zhou, Q. W. Shi, M. W. WuNov 23, 2003
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Universal depinning force fluctuations of an elastic line: Application to finite temperature behavior
The depinning of an elastic line in a random medium is studied via an extremal model. The latter gives access to the instantaneous depinning force for each successive conformation of the line. Based…
Damien Vandembroucq, Rune Skoe, Stephane RouxNov 20, 2003
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Magneto-Gyrotropic Photogalvanic Effect in Semiconductor Quantum Wells
We investigate both experimentally and theoretically, the magneto-gyrotropic photogalvanic effect in zinc-blende based quantum wells with C2v point-group symmetry using optical excitation in the…
V. V. Bel'kov, S. D. Ganichev, Petra Schneider et al.Nov 20, 2003
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Many-Body Density Matrices for Free Fermions
Building upon an analytical technique introduced by Chung and Peschel [M. Chung and I. Peschel, Phys. Rev. B 64, art. 064412 (2001)], we calculated the density matrix rhoB of a finite block of B…
Siew-Ann Cheong, Christopher L. HenleyNov 20, 2003
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Spin-polarized current amplification and spin injection in magnetic bipolar transistors
The magnetic bipolar transistor (MBT) is a bipolar junction transistor with an equilibrium and nonequilibrium spin (magnetization) in the emitter, base, or collector. The low-injection theory of…
Jaroslav Fabian, Igor ZuticNov 19, 2003
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Charge-based silicon quantum computer architectures using controlled single-ion implantation
We report a nanofabrication, control and measurement scheme for charge-based silicon quantum computing which utilises a new technique of controlled single ion implantation. Each qubit consists of two…
A. S. Dzurak, L. C. L. Hollenberg, D. N. Jamieson et al.Nov 19, 2003
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Snell's law for surface electrons: Refraction of an electron gas imaged in real space
On NaCl(100)/Cu(111) an interface state band is observed that descends from the surface-state band of the clean copper surface. This band exhibits a Moire-pattern-induced one-dimensional band gap,…
Jascha Repp, Gerhard Meyer, Karl-Heinz RiederNov 18, 2003
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Spherical Crystallography: Virus Buckling and Grain Boundary Scars
Ordered states on spheres require a minimum number of topological defects. For the case of crystalline order, triangular lattices must be interrupted by an array of at least 12 five-fold disclination…
David R. NelsonNov 18, 2003
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Stochastic energy-cascade model for 1+1 dimensional fully developed turbulence
Geometrical random multiplicative cascade processes are often used to model positive-valued multifractal fields such as the energy dissipation in fully developed turbulence. We propose a dynamical…
Juergen Schmiegel, Jochen Cleve, Hans C. Eggers et al.Nov 17, 2003
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