2,301 research outputs found
A theorem for the beam splitter entangler
It is conjectured that the an entanglement output states from a beam splitter
requires the nonclassicality in the input state(M.S. Kim, W. Son, V. Buzek and
P. L. Knight, Phys. Rev. A, 65, 032323(2002)). Here we give a proof for this
conjecture.Comment: Two relevant literatures added. To appear in Phys. Rev.
Simulation of quantum random walks using interference of classical field
We suggest a theoretical scheme for the simulation of quantum random walks on
a line using beam splitters, phase shifters and photodetectors. Our model
enables us to simulate a quantum random walk with use of the wave nature of
classical light fields. Furthermore, the proposed set-up allows the analysis of
the effects of decoherence. The transition from a pure mean photon-number
distribution to a classical one is studied varying the decoherence parameters.Comment: extensively revised version; title changed; to appear on Phys. Rev.
Sectioned images and surface models of a cadaver head with reference to botulinum neurotoxin injection
Background: The aim of this study is to elucidate the anatomical considerations with reference to botulinum neurotoxin type A (BTX) injection, on sectioned images and surface models, using Visible Korean. These can be used for medical education and clinical training in the field of facial surgery.Materials and methods: Serially sectioned images of the head were obtained from a cadaver. Significant anatomic structures in the sectioned images were outlined and assembled to create a surface model.Results: The PDF file (27.8 MB) of the stacked models can be accessed for free. The file can also be obtained from the authors by email. Using this file, important anatomical structures associated with the BTX injection can be investigated in the sectioned images. All surface models and stereoscopic structures related with theBTX injection are described in real time.Conclusions: We hope that these state-of-the-art sectioned images, outlined images, and surface models will assist students and trainees in acquiring a better understanding of the anatomy associated with the BTX injection
Properties of a beam splitter entangler with Gaussian input states
An explicit formula is given for the quantity of entanglement in the output
state of a beam splitter, given the squeezed vacuum states input in each mode.Comment: To appear in Phys. Rev.
Preliminary Study of Treatment of Spent Test Tubes Used for Blood Tests by Acidic Electrolyzed Water
M-theory Supertubes with Three and Four Charges
Using the covariant M5-brane action, we construct configurations
corresponding to supertubes with three and four charges. We derive the BPS
equations and study the full structure of the solutions. In particular, we find
new solutions involving arbitrariness in field strengths.Comment: 24 pages, references added and typos correcte
Tailoring Single and Multiphoton Probabilities of a Single Photon On-Demand Source
As typically implemented, single photon sources cannot be made to produce
single photons with high probability, while simultaneously suppressing the
probability of yielding two or more photons. Because of this, single photon
sources cannot really produce single photons on demand. We describe a
multiplexed system that allows the probabilities of producing one and more
photons to be adjusted independently, enabling a much better approximation of a
source of single photons on demand.Comment: 4 pages, LaTex, 2 figures, twocolumn and RevTex Style for PR
Role of correlated two-pion exchange in scattering
A dynamical model for S-- and P--wave correlated (and )
exchange between a kaon and a nucleon is presented, starting from corresponding
amplitudes in the pseudophysical region, which
have been constructed from nucleon, --isobar and hyperon (,
) exchange Born terms and a realistic meson exchange model of the and amplitude. The
contribution in the s--channel is then obtained by performing a dispersion
relation over the unitarity cut. In the --channel, considerable
ambiguities exist, depending on how the dispersion integral is performed. Our
model, supplemented by short range interaction terms, is able to describe
empirical data below pion production threshold in a satisfactory way.Comment: 24 pages, REVTEX, figures available from the author
Flavor Twisted Boundary Conditions, Pion Momentum, and the Pion Electromagnetic Form Factor
We investigate the utility of partially twisted boundary conditions in
lattice calculations of meson observables. For dynamical simulations, we show
that the pion dispersion relation is modified by volume effects. In the isospin
limit, we demonstrate that the pion electromagnetic form factor can be computed
on the lattice at continuous values of the momentum transfer. Furthermore, the
finite volume effects are under theoretical control for extraction of the pion
charge radius.Comment: 15 pages, 8 figures, revisions to text, refs adde
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Feasibility study and design concept for an orbiting ice-penetrating radar sounder to characterize in three-dimensions the Europan ice mantle down to (and including) any ice/ocean interface
This report presents a radar sounding model based on the range of current working hypotheses for the nature of Europa's icy shell.Institute for Geophysic
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