700 research outputs found
Scaling the neutral atom Rydberg gate quantum computer by collective encoding in Holmium atoms
We discuss a method for scaling a neutral atom Rydberg gate quantum processor
to a large number of qubits. Limits are derived showing that the number of
qubits that can be directly connected by entangling gates with errors at the
level using long range Rydberg interactions between sites in an
optical lattice, without mechanical motion or swap chains, is about 500 in two
dimensions and 7500 in three dimensions. A scaling factor of 60 at a smaller
number of sites can be obtained using collective register encoding in the
hyperfine ground states of the rare earth atom Holmium. We present a detailed
analysis of operation of the 60 qubit register in Holmium. Combining a lattice
of multi-qubit ensembles with collective encoding results in a feasible design
for a 1000 qubit fully connected quantum processor.Comment: 6 figure
Langmuir-Schaefer films of a polyaniline-gold nanoparticle composite material for applications in organic memristive devices
Langmuir-Shaefer films of a polyaniline-gold nanoparticle composite were fabricated and characterized. The thickness of each deposited monolayer, determined with AFM, was found to be about 0.8 nm. The film morphology was studied by SEM, revealing the presence of embedded spherical-shaped gold nanoparticles of about 5-10 nm in diameter. The fabricated films were used as the active channel of the organic memristor. Its electric characterisation has revealed new phenomena, such as an increased working voltage range and sigmoidal voltage current characteristics that were connected to the charge trappin
Elastic Scattering Amplitude at 1.8 TeV and Determination of Total Cross Section
The data on p elastic scattering at 1.8 and 1.96 TeV are
analysed in terms of real and imaginary amplitudes, in a treatment with high
accuracy, covering the whole t-range and satisfying the expectation of
dispersion relation for amplitudes and for slopes. A method is introduced for
determination of the total cross section and the other forward scattering
parameters and to check compatibility of E-710, CDF and the recent D0 data.
Slopes and of the real and imaginary amplitudes, treated as
independent quantities, influence the amplitudes in the whole t-range and are
important for the determination of the total cross section. The amplitudes are
fully constructed, and a prediction is made of a marked dip in in
the range 3 - 5 GeV due to the universal contribution of the process
of three gluon exchange.Comment: 22 pages, 12 figures, 2 table
Renormalization Group Theory for a Perturbed KdV Equation
We show that renormalization group(RG) theory can be used to give an analytic
description of the evolution of a perturbed KdV equation. The equations
describing the deformation of its shape as the effect of perturbation are RG
equations. The RG approach may be simpler than inverse scattering theory(IST)
and another approaches, because it dose not rely on any knowledge of IST and it
is very concise and easy to understand. To the best of our knowledge, this is
the first time that RG has been used in this way for the perturbed soliton
dynamics.Comment: 4 pages, no figure, revte
Three- and Four-Body Scattering Calculations including the Coulomb Force
The method of screening and renormalization for including the Coulomb
interaction in the framework of momentum-space integral equations is applied to
the three- and four-body nuclear reactions. The Coulomb effect on the
observables and the ability of the present nuclear potential models to describe
the experimental data is discussed.Comment: Proceedings of the Critical Stability workshop, Erice, Sicily,
October 2008, to be published in Few-Body System
Formation of Nanoclusters and Nanopillars in Nonequilibrium Surface Growth for Catalysis Applications: Growth by Diffusional Transport of Matter in Solution Synthesis
Growth of nanoclusters and nanopillars is considered in a model of surface
deposition of building blocks (atoms) diffusionally transported from solution
to the forming surface structure. Processes of surface restructuring are also
accounted for in the model, which then yields morphologies of interest in
catalysis applications. Kinetic Monte Carlo numerical approach is utilized to
explore the emergence of FCC-symmetry surface features in Pt-type metal
nanostructures. Available results exemplify evaluation of the fraction of the
resulting active sites with desirable properties for catalysis, such as
(111)-like coordination, as well as suggest optimal growth regimes
Non-trivial Soliton Scattering in Planar Integrable Systems
The behavior of solitons in integrable theories is strongly constrained by
the integrability of the theory, that is by the existence of an infinite number
of conserved quantities that these theories are known to possess. As a result
the soliton scattering of such theories are expected to be trivial (with no
change of direction, velocity or shape). In this paper we present an extended
review on soliton scattering of two spatial dimensional integrable systems
which have been derived as dimensional reductions of the self-dual
Yang-Mills-Higgs equations and whose scattering properties are highly
non-trivial.Comment: 25 pages + 9 Figures, Review Paper to appear in International Journal
of Modern Physics
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