Role of the surface height correlation function in the enhanced backscattering of light from random metallic surfaces

1991 ◽  
Author(s):  
Alexei A. Maradudin ◽  
T. Michel
Keyword(s):  
Correlation Function ◽  
Metallic Surfaces ◽  
Enhanced Backscattering

The coupling of single-photon exciton–biexciton quantum dot and cavity

2017 ◽  
Vol 26 (03) ◽  
pp. 1750029 ◽  
Author(s):  
Lina Jaya Diguna ◽  
Yudi Darma ◽  
Muhammad Danang Birowosuto
Keyword(s):  
Correlation Function ◽  
Quantum Dot ◽  
Density Matrix ◽  
High Probability ◽  
Single Photon ◽  
Photon Emission ◽  
Emission Properties ◽  
Proposed Model ◽  
Cavity System

We investigate the influence of multiple excitons on the photon emission properties of a quantum dot (QD)-cavity system via the master equation for the density matrix. We show that in the intermediate to strong coupling regimes, the multiple excitons lead to the suppressed QD emissions as well as the absence of anti-crossing near zero detuning, arising from the interaction between the multiple excitons and cavity. Furthermore, we analyze the role of the cavity-biexciton detuning in the photon emission properties of cavity and exciton through the second-order correlation function. The small cavity-biexciton detuning yields the significant Purcell effect and the high probability of single photon emissions. The proposed model offers the fundamental approach in developing efficient single-photon emitting devices.

Role of Fibronectin on Staphylococcal Adherence to Metallic Surfaces Used as Models of Orthopaedic Devices

1990 ◽  
pp. 349-352
Author(s):  
Marino Delmi ◽  
Pierre Vaudaux ◽  
Pierre Descouts ◽  
P. Daniel Lew ◽  
Harold Vasey
Keyword(s):  
Metallic Surfaces

On the role of the periodical structures induced by powerful laser irradiation of metallic surfaces in the energy coupling process

Physica B+C ◽  
1985 ◽  
Vol 132 (3) ◽  
pp. 395-402 ◽  
Author(s):  
I. Ursu ◽  
I.N. Mihăilescu ◽  
A.M. Prokhorov ◽  
V.I. Konov ◽  
V.N. Tokarev
Keyword(s):  
Laser Irradiation ◽  
Energy Coupling ◽  
Powerful Laser ◽  
Metallic Surfaces ◽  
Coupling Process

scholarly journals Multi-Particle Interference in an Electronic Mach–Zehnder Interferometer

Entropy ◽  
2021 ◽  
Vol 23 (6) ◽  
pp. 736
Author(s):  
Janne Kotilahti ◽  
Pablo Burset ◽  
Michael Moskalets ◽  
Christian Flindt
Keyword(s):  
Correlation Function ◽  
Diffraction Pattern ◽  
Charge Carriers ◽  
Zehnder Interferometer ◽  
Particle State ◽  
Electron Sources ◽  
First Order ◽  
Quantum Properties ◽  
Mach Zehnder Interferometer

The development of dynamic single-electron sources has made it possible to observe and manipulate the quantum properties of individual charge carriers in mesoscopic circuits. Here, we investigate multi-particle effects in an electronic Mach–Zehnder interferometer driven by a series of voltage pulses. To this end, we employ a Floquet scattering formalism to evaluate the interference current and the visibility in the outputs of the interferometer. An injected multi-particle state can be described by its first-order correlation function, which we decompose into a sum of elementary correlation functions that each represent a single particle. Each particle in the pulse contributes independently to the interference current, while the visibility (given by the maximal interference current) exhibits a Fraunhofer-like diffraction pattern caused by the multi-particle interference between different particles in the pulse. For a sequence of multi-particle pulses, the visibility resembles the diffraction pattern from a grid, with the role of the grid and the spacing between the slits being played by the pulses and the time delay between them. Our findings may be observed in future experiments by injecting multi-particle pulses into a Mach–Zehnder interferometer.

The role of mass transfer in the kinetics of anodic dissolution of gas-evolving metallic surfaces

1980 ◽  
Vol 10 (4) ◽  
pp. 543-547 ◽  
Author(s):  
G. H. Sedahmed ◽  
I. A. S. Mansour ◽  
A. A. Zatout ◽  
N. A. Abdel-Hay
Keyword(s):  
Mass Transfer ◽  
Anodic Dissolution ◽  
Metallic Surfaces ◽  
Kinetics Of

scholarly journals The role of galaxies and AGN in reionizing the IGM – III. IGM–galaxy cross-correlations at z ∼ 6 from eight quasar fields with DEIMOS and MUSE

2020 ◽  
Vol 494 (2) ◽  
pp. 1560-1578
Author(s):  
Romain A Meyer ◽  
Koki Kakiichi ◽  
Sarah E I Bosman ◽  
Richard S Ellis ◽  
Nicolas Laporte ◽  
...  
Keyword(s):  
Correlation Function ◽  
Cross Correlation ◽  
Mean Free Path ◽  
Lyman Break Galaxies ◽  
The Galaxy ◽  
Cross Correlations ◽  
The Mean ◽  
Improved Model ◽  
First Time

ABSTRACT We present improved results of the measurement of the correlation between galaxies and the intergalactic medium transmission at the end of reionization. We have gathered a sample of 13 spectroscopically confirmed Lyman-break galaxies (LBGs) and 21 Lyman-α emitters (LAEs) at angular separations 20 arcsec ≲ θ ≲ 10 arcmin (∼0.1–4 pMpc at z ∼ 6) from the sightlines to eight background z ≳ 6 quasars. We report for the first time the detection of an excess of Lyman-α transmission spikes at ∼10–60 cMpc from LAEs (3.2σ) and LBGs (1.9σ). We interpret the data with an improved model of the galaxy–Lyman-α transmission and two-point cross-correlations, which includes the enhanced photoionization due to clustered faint sources, enhanced gas densities around the central bright objects and spatial variations of the mean free path. The observed LAE(LBG)–Lyman-α transmission spike two-point cross-correlation function (2PCCF) constrains the luminosity-averaged escape fraction of all galaxies contributing to reionization to $\langle f_{\rm esc} \rangle _{M_{\rm UV}\lt -12} = 0.14_{-0.05}^{+0.28}\, (0.23_{-0.12}^{+0.46})$. We investigate if the 2PCCF measurement can determine whether bright or faint galaxies are the dominant contributors to reionization. Our results show that a contribution from faint galaxies ($M_{\rm UV} \gt -20 \, (2\sigma)$) is necessary to reproduce the observed 2PCCF and that reionization might be driven by different sub-populations around LBGs and LAEs at z ∼ 6.

scholarly journals The role of coherence on two-particle quantum walks

Open Physics ◽  
2015 ◽  
Vol 13 (1) ◽  
Author(s):  
Li-Hua Lu ◽  
Shan Zhu ◽  
You-Quan Li
Keyword(s):  
Correlation Function ◽  
Average Distance ◽  
Quantum Walk ◽  
Quantum Walks ◽  
Mixed States ◽  
Initial State ◽  
Photon Correlation ◽  
Two Photon ◽  
Degree Of Coherence

AbstractWe investigate the dynamical properties of the two-boson quantum walk in systems with different degrees of coherence, and where the effect of the coherence on the two-boson quantum walk can be naturally introduced. A general analytical expression for the two-boson correlation function, for both pure states and mixed states, is given.We propose a possible two-photon quantum-walk scheme with a mixed initial state, and find that the twophoton correlation function and the average distance between two photons can be influenced by the initial photon distribution, the relative phase, or the degree of coherence. The propagation features of our numerical results can be explained by our analytical two-photon correlation function.

Comparison of Bandwidths in the Inferior Colliculus and the Auditory Nerve. II: Measurement Using a Temporally Manipulated Stimulus

2008 ◽  
Vol 100 (4) ◽  
pp. 2312-2327 ◽  
Author(s):  
Myles Mc Laughlin ◽  
Joelle Nsimire Chabwine ◽  
Marcel van der Heijden ◽  
Philip X. Joris
Keyword(s):  
Correlation Function ◽  
Inferior Colliculus ◽  
Auditory Nerve ◽  
Low Frequency ◽  
Population Level ◽  
Broadband Noise ◽  
Center Frequency ◽  
Future Studies ◽  
Two Populations

To localize low-frequency sounds, humans rely on an interaural comparison of the temporally encoded sound waveform after peripheral filtering. This process can be compared with cross-correlation. For a broadband stimulus, after filtering, the correlation function has a damped oscillatory shape where the periodicity reflects the filter's center frequency and the damping reflects the bandwidth (BW). The physiological equivalent of the correlation function is the noise delay (ND) function, which is obtained from binaural cells by measuring response rate to broadband noise with varying interaural time delays (ITDs). For monaural neurons, delay functions are obtained by counting coincidences for varying delays across spike trains obtained to the same stimulus. Previously, we showed that BWs in monaural and binaural neurons were similar. However, earlier work showed that the damping of delay functions differs significantly between these two populations. Here, we address this paradox by looking at the role of sensitivity to changes in interaural correlation. We measured delay and correlation functions in the cat inferior colliculus (IC) and auditory nerve (AN). We find that, at a population level, AN and IC neurons with similar characteristic frequencies (CF) and BWs can have different responses to changes in correlation. Notably, binaural neurons often show compression, which is not found in the AN and which makes the shape of delay functions more invariant with CF at the level of the IC than at the AN. We conclude that binaural sensitivity is more dependent on correlation sensitivity than has hitherto been appreciated and that the mechanisms underlying correlation sensitivity should be addressed in future studies.

scholarly journals Instanton effects on the role of the low-energy theorem for the scalar gluonic correlation function

2001 ◽  
Vol 686 (1-4) ◽  
pp. 393-412 ◽  
Author(s):  
D. Harnett ◽  
T.G. Steele ◽  
V. Elias
Keyword(s):  
Correlation Function ◽  
Low Energy
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