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Journal articles on the topic 'Finite coherence length'

Author: Grafiati

Published: 10 March 2023

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1

Shinohara, Yuya, and Yoshiyuki Amemiya. "Effect of finite spatial coherence length on small-angle scattering." Journal of Applied Crystallography 48, no. 6 (2015): 1660–64. http://dx.doi.org/10.1107/s160057671501715x.

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This study shows that forward scattering at the origin of reciprocal space contributes to the scattering intensity profiles of ultra-small-angle scattering. The forward scattering corresponds to a Fourier transform of the X-ray coherent volume on a sample. This contribution is usually ignored in the study of small-angle scattering, while it is fully considered in the fields of X-ray imaging, such as coherent X-ray diffraction imaging and X-ray ptychography. This effect is explicitly illustrated in the context of small-angle scattering, and the effect of a finite spatial coherence length on sma

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2

Jacoboni, Carlo, and Paolo Bordone. "Wigner transport equation with finite coherence length." Journal of Computational Electronics 13, no. 1 (2013): 257–63. http://dx.doi.org/10.1007/s10825-013-0510-7.

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3

Baesens, C., and R. S. MacKay. "Finite coherence length for equilibrium states of generalized adiabatic Holstein models." Journal of Mathematical Physics 38, no. 4 (1997): 2104–14. http://dx.doi.org/10.1063/1.532197.

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4

Tomita, Makoto, and Hiroshi Ikari. "Influence of finite coherence length of incoming light on enhanced backscattering." Physical Review B 43, no. 4 (1991): 3716–19. http://dx.doi.org/10.1103/physrevb.43.3716.

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5

Hayashi, Masahito, Kun Fang, and Kun Wang. "Finite Block Length Analysis on Quantum Coherence Distillation and Incoherent Randomness Extraction." IEEE Transactions on Information Theory 67, no. 6 (2021): 3926–44. http://dx.doi.org/10.1109/tit.2021.3064009.

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6

Gong, Zhiben, Yingjian Wang, and Yi Wu. "Finite temporal measurements of the statistical characteristics of the atmospheric coherence length." Applied Optics 37, no. 21 (1998): 4541. http://dx.doi.org/10.1364/ao.37.004541.

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7

CRISAN, M., and I. GROSU. "BOSE–EINSTEIN QUASICONDENSATION IN 2D SYSTEMS." Modern Physics Letters B 19, no. 17 (2005): 821–27. http://dx.doi.org/10.1142/s0217984905008852.

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We calculate the finite temperature correlation function, the coherence length and the critical temperature for a two-dimensional (2D) bosonic system, which presents the quasicondensation (a finite number of occupied states with p0≠0 momentum) effect at very low temperatures. This state, discovered experimentally, appear below a critical temperature for a finite number of particles.

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8

Rajput, B. S., and Sandeep Kumar. "Superconductivity due to Condensation of Monopoles around RCD Strings in SU(2) Gauge Theory." Advances in High Energy Physics 2010 (2010): 1–22. http://dx.doi.org/10.1155/2010/768054.

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The study of the condensation of monopoles and the resulting chromomagnetic superconductivity have been undertaken in restricted chromodynamics of SU(2) gauge theory. Constructing the RCD Lagrangian and the partition function for monopoles in terms of string action and the action of the current around the strings, the monopole current in RCD chromo magnetic superconductor has been derived and it has shown that in London' limit the penetration length governs the monopole density around RCD string in chromo magnetic superconductors while with finite (nonzero) coherence length the leading behavio

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9

BEATO, V., and H. ENGEL. "COHERENCE RESONANCE PHENOMENA IN AN EXCITABLE SYSTEM DRIVEN BY COLORED NOISE." Fluctuation and Noise Letters 06, no. 01 (2006): L85—L94. http://dx.doi.org/10.1142/s0219477506003173.

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We study the coherence of noise-induced excitations in a modified stochastic Oregonator model for the light-sensitive Belousov-Zhabotinsky (BZ) reaction assuming that the intensity of the applied illumination is a spatio-temporal stochastic field with finite correlation time and correlation length. For a single excitable element, we find coherence resonance (CR) with respect to the correlation time. In the spatially extended medium of diffusively coupled excitable elements, we observe CR for suitable combinations of the correlation time and length of the noise.

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10

Westfahl, Harry, Sérgio A. Lordano Luiz, Bernd C. Meyer, and Florian Meneau. "The coherent radiation fraction of low-emittance synchrotrons." Journal of Synchrotron Radiation 24, no. 3 (2017): 566–75. http://dx.doi.org/10.1107/s1600577517003058.

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In this work the coherence properties of the synchrotron radiation beam from an X-ray undulator in a fourth-generation storage ring are analyzed. A slightly focused X-ray beam is simulated using a wavefront propagation through a non-redundant array of slits and the mutual coherence function is directly obtained and compared with the Gaussian–Schell approximation. The numerical wave propagation and the approximate analytical approaches are shown to agree qualitatively, and it is also shown that, when the coherent fraction is selected by a finite aperture before the focusing element, even achrom

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11

CRISAN, M., I. TIFREA, D. BODEA, and I. GROSU. "CRITICAL BEHAVIOR OF A TWO-DIMENSIONAL DILUTE BOSE GAS." Modern Physics Letters B 15, no. 20 (2001): 837–46. http://dx.doi.org/10.1142/s0217984901002634.

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We applied the Renormalization Group method at finite temperature to reconsider the two-dimensional dilute Bose gas. The general flow equations are obtained for the case of arbitrary dimensions, and by considering the two-dimensional limit, we estimate the value of the critical temperature, coherence length and specific heat. The value of the critical temperature is in agreement with previous calculations performed using the t-matrix method. The coherence length and the specific heat present a non-universal behavior, a logarithmic temperature dependence in the critical region being identified.

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12

Mattiucci, Nadia, Giuseppe D'Aguanno, Michael Scalora, and Mark J. Bloemer. "Coherence length for second-harmonic generation in nonlinear, one-dimensional, finite, multilayered structures." Journal of the Optical Society of America B 24, no. 4 (2007): 877. http://dx.doi.org/10.1364/josab.24.000877.

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13

GEORGELIN, Y., M. KNECHT, Y. LEBLANC, and J. C. WALLET. "FINITE TEMPERATURE LINEAR RESPONSE THEORY OF ANYONIC SUPERCONDUCTIVITY." Modern Physics Letters B 05, no. 03 (1991): 211–25. http://dx.doi.org/10.1142/s0217984991000265.

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We extend a zero temperature non-relativistic anyonic superconductivity model to the finite temperature case. Making use of the finite temperature linear response theory, we calculate temperature corrections to various parameters of zero temperature superconductivity such as the London penetration depth, the acoustic phonon velocity and the coherence length. These results are qualitatively compared to known experimental results. Our results are expected to be valid in the low temperature regime.

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14

Kim, Seong-Hu, and Yong-Hwa Park. "Interaural Coherence Estimation for Speech Processing in Reverberant Environment." Applied Sciences 10, no. 3 (2020): 769. http://dx.doi.org/10.3390/app10030769.

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Interaural coherence is used to quantify the effects of reverberation on speech, and previous studies applied the conventional method using all previous time data in the form of an infinite impulse response filter to estimate interaural coherence. To consider a characteristic of speech that continuously changes over time, this paper proposes a new method of estimating interaural coherence using time data within a finite length of speech, which is called the quasi-steady interval. The length of the quasi-steady interval is determined with various frequency bands, reverberation times, and short-

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15

LEBLANC, Y., and J. C. WALLET. "MORE ON FINITE TEMPERATURE ANYON SUPERCONDUCTIVITY." Modern Physics Letters B 06, no. 26 (1992): 1623–37. http://dx.doi.org/10.1142/s0217984992001332.

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In the framework of finite temperature linear response theory, we analyze to a greater extent the nature of anyonic superconductivity. Using identities among Laguerre polynomials and Bessel functions, we provide simple and useful expressions for the response function in the form of high temperature expansions. The physical penetration depth as well as the Landau-Ginzburg coherence length are calculated for all temperatures. We find that for statistics restricted by n≪450, anyon superconductors are type II local (London) superconductors at low temperature and type I non-local (Pippard) supercon

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16

Jin, Long, Zirui Zhang, Nuo Wang, Zixin Liu, Yuwei Deng, and Yanhua Fu. "Intensity Distribution of Partially Coherent Array Finite Airy Beams Propagating in Atmospheric Turbulence." International Journal of Optics 2021 (February 5, 2021): 1–11. http://dx.doi.org/10.1155/2021/6649144.

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Based on the extended Huygens–Fresnel integral and the Rytov phase structure function, the closed-form expression of a partially coherent array finite Airy beams (PCAFABs) cutting through the Kolmogorov atmospheric turbulence is derived in the space domain under the paraxial approximation. The characteristics of the PCAFABs evoluting in the atmospheric environment are investigated in detail on the basis of the derived wave propagation formulae. We mainly illustrate the intensity profile of this beam changed with the truncation parameter, coherence length, and turbulence factor at several cross

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17

Suzaki, Yoshifumi, Hiromu Iwata, Keisuke Nakayama, et al. "Apodization Method Owing to the Finite Length of UV Laser Coherence in Fabricating Fiber Bragg Gratings." Japanese Journal of Applied Physics 45, no. 12 (2006): 9100–9102. http://dx.doi.org/10.1143/jjap.45.9100.

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18

Rypina, Irina I., Timothy Getscher, Lawrence J. Pratt, and Tamay Ozgokmen. "Applying dynamical systems techniques to real ocean drifters." Nonlinear Processes in Geophysics 29, no. 4 (2022): 345–61. http://dx.doi.org/10.5194/npg-29-345-2022.

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Abstract. This paper presents the first comprehensive comparison of several different dynamical-systems-based measures of stirring and Lagrangian coherence, computed from real ocean drifters. Seven commonly used methods (finite-time Lyapunov exponent (FTLE), trajectory path length, trajectory correlation dimension, trajectory encounter volume, Lagrangian-averaged vorticity deviation, dilation, and spectral clustering) were applied to 144 surface drifters in the Gulf of Mexico in order to map out the dominant Lagrangian coherent structures. Among the detected structures were regions of hyperbol

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19

Lee, K. L., and F. L. Yang. "Asymptotic analysis for the propagation and arresting process of a finite dry granular mass down a rough incline." Journal of Fluid Mechanics 806 (September 30, 2016): 234–53. http://dx.doi.org/10.1017/jfm.2016.590.

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This work presents an asymptotic analysis for the propagation and arresting process of a two-dimensional finite granular mass down a rough incline in a shallow configuration. Bulk shear stress and arresting mechanism are formulated according to the coherence length model that considers momentum transport at a length scale over which grains are spatially correlated. A Bagnold-like streamwise velocity and a non-zero transverse velocity are solved and integrated into a surface kinematic condition to give an advection–diffusion equation for the bulk surface profile, $h(x,t)$, that is solved using

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20

Islam, Saiful, Johan Stiens, Gert Poesen, Irina Jaeger, and Roger Vounckx. "Passive Frequency Selective Surface Array as a Diffuser for Destroying Millimeter Wave Coherence." Active and Passive Electronic Components 2008 (2008): 1–6. http://dx.doi.org/10.1155/2008/391745.

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This paper presents the design, construction, and testing of grounded frequency selective surface (FSS) array as a diffuser for destroying millimeter wave coherence which is used to eliminate speckle in active millimeter wave imaging. To create stochastically independent illumination patterns, we proposed a diffuser based on random-phase distributions obtained by changing the incident frequency. The random-phase diffuser was obtained by mixing up the phase relations between the cells of a deterministic function (e.g., beam splitter). The slot length of FSS is the main design parameter used to

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21

Yun, Chol-Song, Chol-Jin Kang, Chang-Il Kim, and Song-Chan Li. "Magnetic field dependence of partially-separated Andreev bound states in semiconductor-superconductor nanowires with finite coherence length." Physica B: Condensed Matter 612 (July 2021): 412887. http://dx.doi.org/10.1016/j.physb.2021.412887.

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22

Baraff, G. A. "Model for the effect of finite phase-coherence length on resonant transmission and capture by quantum wells." Physical Review B 58, no. 20 (1998): 13799–810. http://dx.doi.org/10.1103/physrevb.58.13799.

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23

Kim, Su-Chan, and Hyun M. Jang. "Pb()O3-type Perovskites: Part II. Short-range Order Parameter as a Criterion of the Distinction Between Relaxor and Normal Ferroelectrics." Journal of Materials Research 12, no. 8 (1997): 2127–33. http://dx.doi.org/10.1557/jmr.1997.0285.

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A classification scheme of Pb()O3-type perovskites with respect to the B-site order parameters was proposed based on the theoretical calculation of the short-range order parameter (σ) using the pair-correlation model. The calculated order parameters predict that a Pb()O3-type perovskite without any charge difference between B′ and B″ cations [e.g., Pb(Zr1/2Ti1/2)O3 (PZT)] is represented by a completely disordered state with the absence of a finite coherence length. On the other hand, a Pb()O3-type perovskite system having different ionic charges is characterized either by the short-range order

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24

Chabchoub, Amin, Kento Mozumi, Norbert Hoffmann, et al. "Directional soliton and breather beams." Proceedings of the National Academy of Sciences 116, no. 20 (2019): 9759–63. http://dx.doi.org/10.1073/pnas.1821970116.

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Solitons and breathers are nonlinear modes that exist in a wide range of physical systems. They are fundamental solutions of a number of nonlinear wave evolution equations, including the unidirectional nonlinear Schrödinger equation (NLSE). We report the observation of slanted solitons and breathers propagating at an angle with respect to the direction of propagation of the wave field. As the coherence is diagonal, the scale in the crest direction becomes finite; consequently, beam dynamics form. Spatiotemporal measurements of the water surface elevation are obtained by stereo-reconstructing t

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25

Lubatsch, Andreas, and Regine Frank. "A Self-Consistent Quantum Field Theory for Random Lasing." Applied Sciences 9, no. 12 (2019): 2477. http://dx.doi.org/10.3390/app9122477.

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The spatial formation of coherent random laser modes in strongly scattering disordered random media is a central feature in the understanding of the physics of random lasers. We derive a quantum field theoretical method for random lasing in disordered samples of complex amplifying Mie resonators which is able to provide self-consistently and free of any fit parameter the full set of transport characteristics at and above the laser phase transition. The coherence length and the correlation volume respectively is derived as an experimentally measurable scale of the phase transition at the laser

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26

DI CASTRO, DANIELE, MARCELLO COLAPIETRO, and GINESTRA BIANCONI. "METALLIC STRIPES IN OXYGEN DOPED La2CuO4." International Journal of Modern Physics B 14, no. 29n31 (2000): 3438–43. http://dx.doi.org/10.1142/s0217979200003927.

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We have investigated the charge ordering in an oxygen doped La 2 CuO 4 crystal by diffuse high-resolution x-ray diffraction using synchrotron radiation. The micro-strain ε in the CuO 2 plane is close to the micro-strain ε0 for the formation of static charge ordered phases. The crystal shows the co-existence of a first phase with an insulating crystal of charge strings and a second superconducting phase of "supestripes". The first insulating phase is due to charges at the critical doping 1/8 self trapped into a crystal of ordered strings of finite length (~60 Å) and a commensurate period of 4 l

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27

Parra, Carolina, Francis C. Niestemski, Alex W. Contryman, et al. "Signatures of two-dimensional superconductivity emerging within a three-dimensional host superconductor." Proceedings of the National Academy of Sciences 118, no. 16 (2021): e2017810118. http://dx.doi.org/10.1073/pnas.2017810118.

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Spatial disorder has been shown to drive two-dimensional (2D) superconductors to an insulating phase through a superconductor–insulator transition (SIT). Numerical calculations predict that with increasing disorder, emergent electronic granularity is expected in these materials—a phenomenon where superconducting (SC) domains on the scale of the material’s coherence length are embedded in an insulating matrix and coherently coupled by Josephson tunneling. Here, we present spatially resolved scanning tunneling spectroscopy (STS) measurements of the three-dimensional (3D) superconductor BaPb1−xBi

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28

Abiuso, Paolo, Harry J. D. Miller, Martí Perarnau-Llobet, and Matteo Scandi. "Geometric Optimisation of Quantum Thermodynamic Processes." Entropy 22, no. 10 (2020): 1076. http://dx.doi.org/10.3390/e22101076.

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Differential geometry offers a powerful framework for optimising and characterising finite-time thermodynamic processes, both classical and quantum. Here, we start by a pedagogical introduction to the notion of thermodynamic length. We review and connect different frameworks where it emerges in the quantum regime: adiabatically driven closed systems, time-dependent Lindblad master equations, and discrete processes. A geometric lower bound on entropy production in finite-time is then presented, which represents a quantum generalisation of the original classical bound. Following this, we review

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29

CAMPI, G., D. DI CASTRO, C. DELL'OMO, et al. "TEMPERATURE AND X-RAY ILLUMINATION EFFECTS IN OXYGEN DOPED La2CuO4." International Journal of Modern Physics B 17, no. 04n06 (2003): 836–41. http://dx.doi.org/10.1142/s0217979203016698.

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We have investigated charge ordering in an oxygen doped La 2 CuO 4.1 crystal by high resolution x-ray diffraction using synchrotron radiation. Thanks to the high brilliance synchrotron radiation it has been possible to record a large number of weak superstructure spots due to charge ordering around the main peaks of the average structure. A study of the charge modulations with stage 3.5, and their behaviour as a function of the temperature and the intensity of the x-ray incident flux is reported. We are able to distinguish a microscopic decomposition in; 1) a stable domain, due to charges self

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30

TRIVEDI, NANDINI, YEN LEE LOH, KARIM BOUADIM, and MOHIT RANDERIA. "ASPECTS OF LOCALIZATION ACROSS THE 2D SUPERCONDUCTOR-INSULATOR TRANSITION." International Journal of Modern Physics: Conference Series 11 (January 2012): 22–37. http://dx.doi.org/10.1142/s2010194512006137.

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It is well known that the metal-insulator transition in two dimensions for non-interacting fermions takes place at infinitesimal disorder. In contrast, the superconductor-to-insulator transition takes place at a finite critical disorder (on the order of Vc ~ 2t), where V is the typical width of the distribution of random site energies and t is the hopping scale. In this article we compare the localization/delocalization properties of one and two particles. Whereas the metal-insulator transition is a consequence of single-particle Anderson localization, the superconductor-insulator transition (

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31

Chaudhari, Mayank K., Bipin K. Singh, and Praveen C. Pandey. "Enhanced light trapping in dye-sensitized solar cell by coupling to 1D photonic crystal and accounting for finite coherence length." Journal of Modern Optics 64, no. 21 (2017): 2385–93. http://dx.doi.org/10.1080/09500340.2017.1363918.

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32

Eichmann, B., and M. Kachelrieß. "Impact of the finite life-time of UHECR sources." Journal of Cosmology and Astroparticle Physics 2023, no. 02 (2023): 053. http://dx.doi.org/10.1088/1475-7516/2023/02/053.

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Abstract The observational data on ultrahigh energy cosmic rays (UHECR), in particular their mass composition, show strong indications for extremely hard spectra of individual mass groups of CR nuclei at Earth. In this work, we show that such hard spectra can be the result of the finite life-time of UHECR sources, if a few individual sources dominate the UHECR flux at the highest energies. In this case, time delays induced by deflections in the turbulent extragalactic magnetic field as well as from the diffusive or advective escape from the source environment can suppress low-energy CRs, leadi

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33

Crist, Buckley, and Paul R. Howard. "Lineshape Analysis of X-ray Diffraction Profiles: Polyethylene and Model Copolymers." Advances in X-ray Analysis 34 (1990): 519–29. http://dx.doi.org/10.1154/s0376030800014841.

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Studies of the shapes of X-ray diffraction peaks from synthetic polymers are still rather uncommon. One probable cause of this situation is the small peak-to-background ratio in most polymer diffraction experiments; it is difficult to achieve precise line profiles for quantitative analysis. Increased utilization of automated data collection/analysis systems and more intense X-ray sources should alleviate this restriction. We suspect, furthermore, that confusion about nomenclature has impeded the acceptance of lineshape analysis for polymers. The peak broadening mechanisms which are generally c

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34

BRANDOW, B. H. "VALENCE-FLUCTUATION MECHANISM FOR CUPRATE SUPERCONDUCTIVITY." International Journal of Modern Physics B 08, no. 19 (1994): 2667–719. http://dx.doi.org/10.1142/s021797929400107x.

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We explore the concept that the above-T c state is a normal Fermi liquid with strong correlations of the type found in valence-fluctuation and heavy-fermion materials. Experimental evidence and theoretical arguments for this phase are presented. Using an Anderson lattice model Hamiltonian, and a variational many-body formalism, the finite-U mechanism for s-like (full point-group symmetry) pairing is examined in detail. At the mean field or (1/N)0 level of approximation, the pairing tendency is strongly opposed by a magnetic tendency arising from a Gutzwiller version of hybridization renormaliz

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35

Ruzanski, Evan, John C. Hubbert, and V. Chandrasekar. "Evaluation of the Simultaneous Multiple Pulse Repetition Frequency Algorithm for Weather Radar." Journal of Atmospheric and Oceanic Technology 25, no. 7 (2008): 1166–81. http://dx.doi.org/10.1175/2007jtecha1042.1.

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Abstract Performance of the simultaneous multiple pulse repetition frequency algorithm (SMPRF) for recovery of mean power and mean Doppler velocity is investigated using simulated weather radar data. Operation and functionality of the algorithm is described; methods to estimate mean power values using statistical inversion and to estimate mean velocity from unevenly spaced autocorrelation function samples are presented and analyzed. A simulation technique for constructing multiple pulse repetition interval data is described and the algorithm performance results are presented for an example SMP

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36

Alok Dua, Mathias Clobes, and Thomas Höbbel. "Dynamic Analysis of Overhead Transmission Line under Turbulent Wind Loading." Electronic Journal of Structural Engineering 15 (June 1, 2015): 46–54. http://dx.doi.org/10.56748/ejse.15201.

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This paper compares the dynamic response of a test transmission line with the response due to static loads given by Eurocode. Finite element design software SAP2000 was used to model towers and power-lines. Nonlinear dynamic analysis including the large displacement effects was carried out. Macroscopic aspects of wind coherence along element length and integration time step were investigated. An approach is presented to compare the probabilistic dynamic response due to 7 different stochastically simulated wind fields with the response according to EN-50341. The developed model is used to study

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Ashoka, A., Bhagyashree K. S., and S. V. Bhat. "Magnetic Field Induced Berezinskii-Kosterlitz-Thouless Correlations in 3-Dimensional Manganites." MRS Advances 5, no. 44 (2020): 2251–60. http://dx.doi.org/10.1557/adv.2020.320.

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AbstractIdeal two-dimensional (2D) Heisenberg magnets lack long range magnetic order. However, the XY model with spins confined to a plane shows a topological phase transition at a finite temperature corresponding to binding and unbinding of vortices. Experimental evidence for such Berezinskii-Kosterlitz-Thouless (BKT) transitions has been difficult to obtain in condensed matter systems, where, even a weak interlayer coupling that is invariably present leads to long-range order, pre-empting the BKT transition. The BKT signatures are still discernible above the long-range ordering temperature,

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38

Kesharpu, Kaushal K., Vladislav D. Kochev, and Pavel D. Grigoriev. "Evolution of Shape and Volume Fraction of Superconducting Domains with Temperature and Anion Disorder in (TMTSF)2ClO4." Crystals 11, no. 1 (2021): 72. http://dx.doi.org/10.3390/cryst11010072.

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In highly anisotropic organic superconductor (TMTSF)2ClO4, superconducting (SC) phase coexists with metallic and spin-density wave phases in the form of domains. Using the Maxwell-Garnett approximation (MGA), we calculate the volume ratio and estimate the shape of these embedded SC domains from resistivity data at various temperature and anion disorder, controlled by the cooling rate or annealing time of (TMTSF)2ClO4 samples. We found that the variation of cooling rate and of annealing time affect differently the shape of SC domains. In all cases the SC domains have oblate shape, being the sho

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39

Zhang, Xiaolei, Yanzhong Ju, and Fuwang Wang. "Statistical Analysis of Wind-Induced Dynamic Response of Power Towers and Four-Circuit Transmission Tower-Line System." Shock and Vibration 2018 (2018): 1–18. http://dx.doi.org/10.1155/2018/5064930.

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Only one wind field model loading the transmission tower or the tower-line system was investigated in the previous studies, while the influence of two different wind field models was not considered. In addition, only one sample of the wind speed random process was used in the past numerical simulations, and the multiple dynamic response statistical analysis should be carried out. In this paper, statistical analysis of the wind-induced dynamic response of single towers and the transmission tower-line system is performed with the improved accuracy. A finite element model of the transmission towe

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40

Beniamini, Paz, Pawan Kumar, and Ramesh Narayan. "Faraday depolarization and induced circular polarization by multipath propagation with application to FRBs." Monthly Notices of the Royal Astronomical Society 510, no. 3 (2021): 4654–68. http://dx.doi.org/10.1093/mnras/stab3730.

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ABSTRACT We describe how the observed polarization properties of an astronomical object are related to its intrinsic polarization properties and the finite temporal and spectral resolutions of the observing device. Moreover, we discuss the effect that a scattering screen, with non-zero magnetic field, between the source and observer has on the observed polarization properties. We show that the polarization properties are determined by the ratio of observing bandwidth and coherence bandwidth of the scattering screen and the ratio of temporal resolution of the instrument and the variability time

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41

Zeng, Fuqiang, Wenzheng Yue, and Chao Li. "Dispersion analysis of borehole sonic measurements by Hilbert transform and band-pass filters." GEOPHYSICS 83, no. 4 (2018): D127—D150. http://dx.doi.org/10.1190/geo2017-0580.1.

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Dispersion analysis of waves can reveal important mechanical properties of the formation around the borehole. The traditional dispersion analysis methods are affected by wave modes and aliasing. A new method is developed to perform dispersion analysis of borehole array acoustic logging, which combines the semblance of time-slowness coherence based on differential phase (STC-DP) processing and band-pass filters. Unlike the classic STC method, STC-DP is not sensitive to the window length. Two kinds of band-pass filters, the multiple filter technique and the finite-impulse response filter, are us

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42

BUSH, JOHN W. M., and ANDREW W. WOODS. "Vortex generation by line plumes in a rotating stratified fluid." Journal of Fluid Mechanics 388 (June 10, 1999): 289–313. http://dx.doi.org/10.1017/s0022112099004759.

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We present the results of an experimental investigation of the generation of coherent vortical structures by buoyant line plumes in rotating fluids. Both uniform and stratified ambients are considered. By combining the scalings describing turbulent plumes and geostrophically balanced vortices, we develop a simple model which predicts the scale of the coherent vortical structures in excellent accord with laboratory experiments.We examine the motion induced by a constant buoyancy flux per unit length B, released for a finite time ts, from a source of length L into a fluid rotating with angular s

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Hattendorff, Johannes, Stefan Seidlmayer, Hubert A. Gasteiger, and Ralph Gilles. "Li-ion half-cells studied operando during cycling by small-angle neutron scattering." Journal of Applied Crystallography 53, no. 1 (2020): 210–21. http://dx.doi.org/10.1107/s160057671901714x.

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Small-angle neutron scattering (SANS) was recently applied to the in situ and operando study of the charge/discharge process in Li-ion battery full-cells based on a pouch cell design. Here, this work is continued in a half-cell with a graphite electrode cycled versus a metallic lithium counter electrode, in a study conducted on the SANS-1 instrument of the neutron source FRM II at the Heinz Maier-Leibnitz Zentrum in Garching, Germany. It is confirmed that the SANS integrated intensity signal varies as a function of graphite lithiation, and this variation can be explained by changes in the squa

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Zimnyakov, Dmitry, Elena Isaeva, Anna Isaeva, and Sergey Volchkov. "Band-Limited Reference-Free Speckle Spectroscopy: Probing the Fluorescent Media in the Vicinity of the Noise-Defined Threshold." Applied Sciences 10, no. 5 (2020): 1629. http://dx.doi.org/10.3390/app10051629.

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A method of reference-free speckle spectroscopy based on the statistical analysis of intensity spatial fluctuations of the spectrally-selected multiple-scattered fluorescence radiation is examined in the case of the finite-band spectral selection of fluorescence light emitted by the laser-pumped random medium, and detection conditions far from the ideal case. Intensity fluctuations are recorded during point-to-point scanning of the surface of a random multiple-scattering medium, which is characterized by the dependences of the second- and third-order statistical moments of intensity on the wav

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MA, Y. L., and X. X. DAI. "PHENOMENOLOGICAL IMPLICATIONS OF HIGH-Tc SUPERCONDUCTIVITY." International Journal of Modern Physics B 06, no. 14 (1992): 2499–519. http://dx.doi.org/10.1142/s0217979292001250.

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We develop a phenomenological model for high-T c superconductors. Some main features are emerging in copper oxides: characteristic quasi two-dimensional Cu-O planes, strong correlation of antiferromagnetism, existence of a vortex lattice structure, and observation of a small coherence length and a large penetration depth. These features indicate that the superconductive pair is reasonably constrained to a small volume in real space and may be conceived of as a string-carrying vortex, and therefore can be well simulated by the dual phenomenological local boson fields [Formula: see text] and Φ.

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Wu, Jian, Bing-Lin Gu, Jing-Zhi Yu, and Yoshiyuki Kawazoe. "Coherent Transport through Carbon Nanotubes with Finite Length." Materials Transactions, JIM 41, no. 5 (2000): 571–73. http://dx.doi.org/10.2320/matertrans1989.41.571.

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Shragge, Jeffrey, Jihyun Yang, Nader Issa, Michael Roelens, Michael Dentith, and Sascha Schediwy. "Low-frequency ambient distributed acoustic sensing (DAS): case study from Perth, Australia." Geophysical Journal International 226, no. 1 (2021): 564–81. http://dx.doi.org/10.1093/gji/ggab111.

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SUMMARY Ambient wavefield data acquired on existing (so-called ‘dark fibre’) optical fibre networks using distributed acoustic sensing (DAS) interrogators allow users to conduct a wide range of subsurface imaging and inversion experiments. In particular, recorded low-frequency (&lt;2 Hz) surface-wave information holds the promise of providing constraints on the shear-wave velocity (VS) to depths exceeding 0.5 km. However, surface-wave analysis can be made challenging by a number of acquisition factors that affect the amplitudes of measured DAS waveforms. To illustrate these sensitivity cha

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Okamoto, Taka-aki, and Iehisa Nezu. "Spatial evolution of coherent motions in finite-length vegetation patch flow." Environmental Fluid Mechanics 13, no. 5 (2013): 417–34. http://dx.doi.org/10.1007/s10652-013-9275-6.

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Kumbhakar, Dharmadas. "Nonlinear Coherent Directional Coupler: Coupled Mode Theory and BPM Simulation." International Journal of Optics 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/173250.

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Finite difference beam propagation method is an accurate numerical procedure, used here to explore the switching dynamics of a nonlinear coherent directional coupler. The coupling lengths derived from this simulation are compared with coupled mode theories. BPM results for the critical power follow the trend of the coupled mode theories, but it lies in between two coupled mode theories. Coupled mode theory is sensitive to numerical approximations whereas BPM results practically do not depend on grid size and longitudinal step size. Effect of coupling-region-width and core-width variations on c

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JANA, DEBNARAYAN. "UNIVERSAL DIAMAGNETISM: EXACT RESULTS AND APPLICATIONS." International Journal of Modern Physics B 15, no. 19n20 (2001): 2811–20. http://dx.doi.org/10.1142/s0217979201006379.

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Diamagnetism is a universal pheneomenon of spinless boson system at any finite temperature regardless of their interactions. We present here the exact, non-perturbative results of universal diamagnetism of charged scalar fields at any finite temperature. As an application, we study the effect of anisotropy of two coherence lengths on diamagnetic susceptibility of Cooper pairs in an arbitrary d-dimensions above the transition temperature.

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