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Condensed Matter papers — page 76

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Resonant versus anti-resonant tunneling at carbon nanotube A-B-A heterostructures
Narrow antiresonances going to zero transmission are found to occur for general (2n,0)(n,n)(2n,0) carbon nanotube heterostructures, whereas the complementary configuration, (n,n)(2n,0)(n,n), displays…
N. Mingo, Liu Yang, Jie Han et al.Oct 11, 2001
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Applicability of the Broken-Bond Rule to the Surface Energy of the fcc Metals
We apply the Green's function based full-potential screened Korringa-Kohn-Rostoker method in conjunction with the local density approximation to study the surface energies of the noble and the…
I. Galanakis, N. Papanikolaou, P. H. DederichsOct 11, 2001
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Calculus of Sea-Displacement Operators
Sea-Displacement Operators for fermions are defined in terms of the Fermi fields in a one-component Fermi system. The main conclusions of this article fully corroborate the conjectures made in our…
Girish S. Setlur, D. S. CitrinOct 11, 2001
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Shake-up and shake-off excitations with associated electron losses in X-ray studies of proteins
Photoionisation of an atom by X-rays usually removes an inner-shell electron from the atom, leaving behind a perturbed "hollow ion" whose relaxation may take different routes. In light…
Petter Persson, Sten Lunell, Abraham Szoeke et al.Oct 11, 2001
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Conductance of metallic carbon nanotubes dipped into a metal
We calculate the conductance variation of several metallic carbon nanotubes as their end is being dipped into a liquid metal electrode, where experiments have shown an achievable conductance close to…
N. Mingo, Jie HanOct 11, 2001
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Riemannian geometry of irrotational vortex acoustics
We consider acoustic propagation in an irrotational vortex, using the technical machinery of differential geometry to investigate the ``acoustic geometry'' that is probed by the sound waves.…
Uwe R. Fischer, Matt VisserOct 10, 2001
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Current induced forces upon atoms adsorbed on conducting carbon nanotubes
We calculate the forces acting upon species adsorbed on a single wall carbon nanotube, in the presence of electric currents. We present a self consistent real space Green function method, which…
N. Mingo, Liu Yang, Jie HanOct 10, 2001
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Effects of Paramagnetic Ferrocenium Cations on the Magnetic Properties of the Anionic Single-Molecule Magnet [Mn12O12(O2CC6F5)16(H2O)4]-
The preparation and physical characterization are reported for several single-molecule magnet salts to investigate the effects of paramagnetic cations on the magnetization relaxation behavior of…
Takayoshi Kuroda-Sowa, Matthew Lam, Arnold L. Rheingold et al.Oct 10, 2001
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A nonlinear differential approach to the Saffman-Taylor finger
Nonlinear time-dependent differential equations for the Hele-Shaw, Saffman-Taylor problem are derived. The equations are obtained using a separable ansatz expansion for the stream function of the…
G. Kälbermann, R. WallachOct 10, 2001
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An empirical analysis of medium-term interest rates
In the present paper, an empirical study of LIBOR (London Interbank Offered Rate) data is presented. In particular, a data set of interest rates from 1997 to 1999, for two different currencies and…
Tiziana Di Matteo, Enrico Scalas, Marco AiroldiOct 8, 2001
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Entanglement and Quantum Gate Operations with Spin-Qubits in Quantum Dots
We give an elementary introduction to the notion of quantum entanglement between distinguishable parties and review a recent proposal about solid state quantum computation with spin-qubits in quantum…
John Schliemann, Daniel LossOct 8, 2001
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Boson peak in an harmonic scalar model
We study, analytically and numerically, an off-lattice model of scalar harmonic vibrations for structural glasses. The model has a Boson-Peak which we argue can be considered as a prototype for…
T. S. Grigera, V. Martin-Mayor, G. Parisi et al.Oct 7, 2001
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Signatures of resonance superfluidity in a quantum Fermi gas
In this letter, we predict a direct and observable signature of the superfluid phase in a quantum Fermi gas, in a temperature regime already accessible in current experiments. We apply the theory of…
M. L. Chiofalo, S. J. J. M. F. Kokkelmans, J. N. Milstein et al.Oct 6, 2001
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Principle of Pattern Selection for Nonequilibrium Phenomena
A general principle is advanced allowing the classification of nonunique solutions to nonlinear evolution equations, corresponding to different spatio-temporal patterns. This is done by defining the…
V. I. YukalovOct 5, 2001
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Microcanonical determination of the order parameter critical exponent
A highly efficient Monte Carlo method for the calculation of the density of states of classical spin systems is presented. As an application, we investigate the density of states OmegaN(E,M) of two-…
Alfred Huller, Michel PleimlingOct 4, 2001
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Measurement of the 3He mass diffusion coefficient in superfluid 4He over the 0.45-0.95 K temperature range
We have measured the mass diffusion coefficient D of 3He in superfluid 4He at temperatures lower than were previously possible. The experimental technique utilizes scintillation light produced when…
S. K. Lamoreaux, G. Archibald, P. D. Barnes et al.Oct 4, 2001
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Short range correlations in a one dimensional electron gas
We use the SSTL (Singwi, Sjolander, Tosi, Land) approximation to investigate the short--range correlations in a one dimensional electron gas, for the first time. Although SSTL is introduced to better…
Murat Tas, Mehmet TomakOct 3, 2001
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Quantum Depletion of an Excited Condensate
We analyze greying of the dark soliton in a Bose-Einstein condensate in the limit of weak interaction between atoms. The condensate initially prepared in the excited dark soliton state is loosing…
Jacek Dziarmaga, Zbyszek P. Karkuszewski, Krzysztof SachaOct 3, 2001
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Squeezing and entanglement in quasiparticle excitations of trapped Bose-Einstein condensates
We estimate the amount of temperature-dependent squeezing and entanglement in the collective excitations of trapped Bose-Einstein condensates. We also demonstrate an alternative method of temperature…
J. Rogel-Salazar, S. Choi, G. H. C. New et al.Oct 3, 2001
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Two-body correlations in Bose condensates
We formulate a method to study two-body correlations in a condensate of N identical bosons. We use the adiabatic hyperspheric approach and assume a Faddeev like decomposition of the wave function. We…
O. Sorensen, D. V. Fedorov, A. S. Jensen et al.Oct 3, 2001
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Self-consistent quantal treatment of decay rates within the perturbed static path approximation
The framework of the Perturbed Static Path Approximation (PSPA) is used to calculate the partition function of a finite Fermi system from a Hamiltonian with a separable two body interaction. Therein,…
C. Rummel, H. HofmannOct 2, 2001
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System Fitness and the Extinction Patterns of Firms under Pure Economic Competition
The relationships which characterise the outcomes of the interactions between firms in the economy appear to follow power law behaviour. In particular, there is evidence that the empirical power laws…
P Ormerod, H JohnsOct 2, 2001
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Interacting crumpled manifolds
In this article we study the effect of a delta-interaction on a polymerized membrane of arbitrary internal dimension D. Depending on the dimensionality of membrane and embedding space, different…
Henryk A. Pinnow, Kay Joerg WieseSep 30, 2001
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Chaotic Scattering of Microwaves
In this paper we analyze a recent experiment conducted in an anechoic chamber, where the scattering of microwaves from an array of metallic cylinders was measured. This is a system which displays…
Tsampikos Kottos, Uzy Smilansky, Joaquim Fortuny et al.Sep 30, 2001
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Tunneling between two semiconductors with localized electrons: Can it reveal the Coulomb gap?
It is shown that the voltage dependence of the tunneling conductance between two lightly doped semiconductors, which are separated by an large area tunneling barrier, can reveal the high energy part…
A. I. Larkin, B. I. ShklovskiiSep 26, 2001
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