نتایج جستجو برای: incoherent formulation

تعداد نتایج: 118294  

Journal: :CoRR 2017
Richard Pettigrew

We would like to arrive at a single coherent pair of credences in X and X. Perhaps we wish to use these to set our own credences; or perhaps we wish to publish them in a report of the WHO as the collective view of expert epidemiologists; or perhaps we wish to use them in a decision-making process to determine how medical research funding should be allocated in 2018. Given their expertise, we wo...

2017
C. Bénard C. BÉNARD

2014 The origin of the chaotic bunching effect is studied from a theoretical point of view. With this in mind, we propose an incohérent atomic source model consisting of atoms excited at stochastically independent times emitting without any interaction. By comparing the fields emitted by such a source and by a chaotic source, we propose the existence of an incoherent bunching effect, the only o...

Journal: :Physical review letters 2014
Ryan Beams Luiz Gustavo Cançado Sang-Hyun Oh Ado Jorio Lukas Novotny

Inelastic light scattering in crystals has historically been treated as a spatially incoherent process, giving rise to incoherent optical radiation. Here we demonstrate that Raman scattering can be spatially coherent, in which case it depends on the dimensionality and symmetry of the scatterer. Using near-field spectroscopy, we measure a correlation length of ∼30  nm for the optical phonons in ...

2005
S. K. Taneja

We evaluate within a microscopic calculation the contributions of both coherent and incoherent deeply virtual Compton scattering from a spin-0 nucleus. The coherent contribution is obtained when the target nucleus recoils as a whole, whereas for incoherent scattering break-up configurations for the final nucleus into a an outgoing nucleon and an A−1 system are considered. The two processes enco...

1999
Young-Su KIM Young-Soo KIM Han-Kyu PARK

In this paper, we propose a new algorithm of enhancing covariance matrix estimate to be used for estimating the directions-of-arrival (DOAs) of multiple incoherent signals incident on a uniform circular array. The underlying covariance matrix possesses a special theoretical property such as having spatial stationarity. The proposed enhancement approach based on the use of this property is found...

Journal: :Optics express 2015
Manuel Rius Mario Bolea José Mora Beatriz Ortega José Capmany

We experimentally demonstrate, for the first time, a chirped microwave pulses generator based on the processing of an incoherent optical signal by means of a nonlinear dispersive element. Different capabilities have been demonstrated such as the control of the time-bandwidth product and the frequency tuning increasing the flexibility of the generated waveform compared to coherent techniques. Mo...

Journal: :Optics express 2012
Mario Bolea José Mora Beatriz Ortega José Capmany

A novel all-optical technique based on the incoherent processing of optical signals using high-order dispersive elements is analyzed for microwave arbitrary pulse generation. We show an approach which allows a full reconfigurability of a pulse in terms of chirp, envelope and central frequency by the proper control of the second-order dispersion and the incoherent optical source power distributi...

Journal: :Optics letters 1996
V Binjrajka C C Chang A W Emanuel D E Leaird A M Weiner

We demonstrate the use of a femtosecond pulse-shaping apparatus for electronically programmable phase filtering of amplified spontaneous emission from an erbium-doped fiber amplifier. Pulse shaping applied to a broadband incoherent light (noise) input results in reshaped noise, with a specially tailored electric field correlation function. Our experiments clearly reveal that phase filtering can...

2016
Eckehard Schöll Anna Zakharova Aleksandar Gjurchinovski

We investigate the influence of time-delayed coupling in a ring network of non-locally coupled Stuart-Landau oscillators upon chimera states, i.e., space-time patterns with coexisting partially coherent and partially incoherent domains. We focus on amplitude chimeras which exhibit incoherent behavior with respect to the amplitude rather than the phase and are transient patterns, and show that t...

Journal: :Physical review. A, Atomic, molecular, and optical physics 2008
Christoph A Marx Upendra Harbola Shaul Mukamel

Nonlinear optical signals from an assembly of N noninteracting particles consist of an incoherent and a coherent component, whose magnitudes scale ~ N and ~ N(N - 1), respectively. A unified microscopic description of both types of signals is developed using a quantum electrodynamical (QED) treatment of the optical fields. Closed nonequilibrium Green's function expressions are derived that inco...

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