The detection of an optical signal using a photonic mixer device (PMD) as an alternative to the PIN photodiode for a high-speed infrared link is discussed. The PMD, at its linear range, is characterized as a correlator detector. The functionality of this PMD for a better Signal-to-Noise Ratio is described. With an improved mixing efficiency and photosensitive area, the PMD will replace the use ...

We present an X-ray-optical cross-correlator for the soft ([Formula: see text]) up to the hard X-ray regime based on a molybdenum-silicon superlattice. The cross-correlation is done by probing intensity and position changes of superlattice Bragg peaks caused by photoexcitation of coherent phonons. This approach is applicable for a wide range of X-ray photon energies as well as for a broad range...

We show that the formalism commonly used to implement BoseEinstein correlations in Monte-Carlo simulations can lead to values of the twoparticle correlator significantly smaller than unity, in the case of sources with strong position-momentum correlations. This is more pronounced when the phase space of the emitted particles is strongly reduced by experimental acceptance or kinematic analysis s...

Optical correlator systems due to their inherent parallel processing capabilities have the potential of processing large data bank to enable rapid identification of targets within an input signal. Purely optical correlation systems are not practical for real time applications. In this paper, we discuss and implement the hybrid correlator system. In this system, the input scene is Fourier transf...

The interior of the color flux tube joining a quark pair can be probed by evaluating the correlator of pair of Polyakov loops in a vacuum modified by another Polyakov pair, in order to check the dual superconductivity conjecture, which predicts a deconfined, hot core. We also point out that at the critical point of any 3D gauge theories with a continuous deconfining transition the Svetitsky-Yaf...

Multipath is one of the most dominant sources of errors in Global Navigation Satellite Systems (GNSS). In this paper we present two tracking structures with multiple gate delays and compare their performance with the performance of Narrow Correlator and High Resolution Correlator. The performance criteria are based on the Multipath Error Envelopes (MEEs), the Root Mean Square Errors (RMSEs) and...

We discuss the correlation function of hadronic currents in the Schwinger model at finite temperature T. We explicitly construct the retarded correlator in real time and obtain analytical results for the Euclidean correlator on a torus. Both constructions lead to the same finite temperature spectral function. The spatial screening lengths in the mesonic channels are related to the dynamical mes...

Several techniques for use in a stereo vision system are described. These include a stereo camera model solver, a high resolution stereo correlator for producing accurate matches with accuracy and confidence estimates, a search technique for using the correlator to produce a dense sampling of matched points for a pair of pictures, and a ground surface finder for distinguishing the ground from o...

Abstract: We analytically calculate higher order corrections to coefficient functions of the operator product expansion (OPE) for the Euclidean correlator of two energy-momentum tensors in massless QCD. These are the three-loop contribution to the coefficient C0 in front of the unity operator O0 = 1 and the one and two-loop contributions to the coefficient C1 in front of the gluon “condensate” ...

A simple physical model for the Synthetic Aperture Radar (SAR) is presented. This model explains the one dimensional and two dimensional nature of the received SAR signal in the range and azimuth directions. A time domain correlator, its algorithm and features are explained. The correlator is ideally suited for VLSI implementation. A real time SAR architecture using these correlators is propose...