Article
Optics
Qian Chen, Zhijie Tan, Hong Yu, Shensheng Han
Summary: Ghost imaging based on high-order correlation of optical field has been rapidly developed and extended to the x-ray region. However, limited photon flux results in severe image deterioration. In this study, Fourier-transform ghost imaging with super-Rayleigh speckles is proposed to achieve high-quality ghost imaging at a low photon flux level. The super-Rayleigh speckles were designed using the direct binary search algorithm to optimize binary modulating screens. Experimental results show that speckle contrast can be greatly enhanced and high-visibility Fourier-transform diffraction patterns of the sample can be obtained. This method is of great importance for high-resolution imaging in photon-limited scenarios, especially for laboratory x-ray systems.
Article
Multidisciplinary Sciences
Andrea Steinfurth, Ivor Kresic, Sebastian Weidemann, Mark Kremer, Konstantinos G. Makris, Matthias Heinrich, Stefan Rotter, Alexander Szameit
Summary: This study theoretically and experimentally demonstrates the possibility of controlling light propagation and diffraction in inhomogeneous media through non-Hermitian tailoring.
Article
Optics
Wenxiang Yan, Yuan Gao, Zheng Yuan, Zhuang Wang, Zhi-Cheng Ren, Xi-Lin Wang, Jianping Ding, Hui-Tian Wang
Summary: This study introduces a method to generate self-accelerating zeroth-order Bessel beams with tunable z direction intensity profiles, which may attract interest in the fields of particle manipulation, microfabrication, and free-space optical interconnects.
Article
Optics
Yue Zhang, Xuan Zhang, Haiyun Wang, Yan Ye, Lin Liu, Yahong Chen, Fei Wang, Yangjian Cai
Summary: In this work, a simple and efficient method based on the superposition of mutually orthogonal Laguerre-Gaussian modes is demonstrated to generate twisted beams with a controllable twist phase. A smaller number of modes is required compared to pseudo-mode superposition due to the use of orthogonal coherent modes. Experimental results confirm theoretical predictions and show the potential application of twisted partially coherent beams in optical imaging and free-space optical communications.
Article
Physics, Fluids & Plasmas
Alexios P. Polychronakos
Summary: This study derives the length and area generating function of forward-moving discrete paths with height restrictions, known as Motzkin meanders, and the more general length-area generating functions for Motzkin paths with markers. The results are obtained by embedding Motzkin paths in a two-step anisotropic Dyck path process and using various techniques. A cluster expansion of the logarithm of the generating functions is presented to reveal their polynomial structure. These results are important for understanding the statistical mechanical properties of physical systems such as polymers and surfaces.
Article
Astronomy & Astrophysics
Ali Kaya
Summary: By analyzing the effects of gravity on a photon beam, we can determine the distribution of Cosmic Microwave Background (CMB) photons in the collecting area of a telescope today. In a simple inflationary model, we can ascertain the power spectrum of the pseudo-scalar at superhorizon scales and discuss potential observational consequences.
Article
Physics, Fluids & Plasmas
Benjamin De Bruyne, Satya N. Majumdar, Gregory Schehr
Summary: The method presented in the study accurately generates bridge trajectories for discrete-time random walks with efficiency, and can be generalized to other types of constrained random walks.
Article
Computer Science, Theory & Methods
Muhammad Aslam, Faten S. Alamri
Summary: This paper introduces a novel approach to simulate random variables from two different probability distributions and provides algorithms tailored to these methods. The study also explores the relationship between the level of uncertainty and the resulting random variables.
JOURNAL OF BIG DATA
(2023)
Article
Astronomy & Astrophysics
Dionysios Karagiannis, Jose Fonseca, Roy Maartens, Stefano Camera
Summary: The 21 cm emission line of neutral hydrogen can trace dark matter after reionisation; Next-generation intensity mapping surveys may serve as probes of primordial non-Gaussianity; Single-dish surveys typically outperform interferometer surveys in power spectrum but are not competitive in bispectrum.
PHYSICS OF THE DARK UNIVERSE
(2021)
Article
Computer Science, Software Engineering
Alex Baeuerle, Christian van Onzenoodt, Timo Ropinski
Summary: This paper introduces an automated approach for visualizing network architectures specified in Keras, aiming to create visualizations directly embeddable into any publication. By analyzing figures from ICCV and CVPR papers, a visual grammar for convolutional neural networks is proposed to achieve a unified and unambiguous visualization design.
IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS
(2021)
Article
Optics
Sachleen Singh, Vasu Dev, Vishwa Pal
Summary: This study presents the generation of asymmetric aberration laser beams (aALBs) with controlled intensity distribution using a diffractive optical element involving phase asymmetry. The results show that the spatial intensity distribution of aALBs can be controlled by adjusting the phase asymmetry parameter, leading to the formation of high-power density lobes. These findings have potential applications in optical trapping and manipulation as well as material processing.
Article
Optics
Xu-Lin Zhang, Feng Yu, Ze-Guo Chen, Zhen-Nan Tian, Qi-Dai Chen, Hong-Bo Sun, Guancong Ma
Summary: The study successfully demonstrates non-Abelian braiding by controlling the geometric-phase matrix in a photonic chip, observing its key characteristics crucial for realizing quantum logics. The experiment showed the swapping of photon dwell sites in both classical-light and single-photon experiments, indicating the potential for implementing non-Abelian physics in photonics. The proposed on-chip photonic system opens up possibilities for studying non-Abelian physics and may lead to the development of next-generation non-Abelian photonic devices.
Article
Optics
Ernesto P. Raposo, Ivan R. R. Gonzalez, Edwin D. Coronel, Antonio M. S. Macedo, Leonardo de S. Menezes, Raman Kashyap, Anderson S. L. Gomes, Robin Kaiser
Summary: The study proposes an approach based on random matrix theory to calculate the temporal second-order intensity correlation function of radiation emitted by random lasers, finding excellent agreement with experimental data and discussing the extension of the method to address the statistical properties of general disordered photonic systems.
Article
Physics, Fluids & Plasmas
V. Oreshkin, R. B. Baksht, R. K. Cherdizov, E. Oreshkin, N. A. Ratakhin, A. G. Rousskikh, A. Shishlov, V. A. Vankevich, A. S. Zhigalin
Summary: This study presents experimental and theoretical research on imploding metal-puff Z-pinches. The experiments demonstrated that pinches of this type are resistant to dynamic MRT instabilities when compressed. Analysis of the experimental results using one-dimensional radiation magnetohydrodynamic simulations revealed that the formation of high-temperature plasma and generation of X-rays occur at the stagantion stage in pinches with a tailored density profile.
PLASMA PHYSICS AND CONTROLLED FUSION
(2021)
Article
Engineering, Electrical & Electronic
Raed Alhamad, Hatem Boujemaa
Summary: This paper investigates the throughput of wireless communications when energy is harvested using a solar panel. The statistics of Signal to Noise Ratio (SNR) and Signal to Interference plus Noise Ratio (SINR) are computed for Rayleigh and Nakagami channels. The performance optimization and multi-user scenarios are discussed, considering the use of Non Orthogonal Multiple Access (NOMA) and the optimization of harvesting duration.
DIGITAL SIGNAL PROCESSING
(2022)
Article
Optics
Ohad Lib, Yaron Bromberg
Correction
Optics
Wen Xiong, Chia Wei Hsu, Yaron Bromberg, Jose Enrique Antonio-Lopez, Rodrigo Amezcua Correa, Hui Cao
LIGHT-SCIENCE & APPLICATIONS
(2020)
Article
Optics
Shachar Resisi, Yehonatan Viernik, Sebastien M. Popoff, Yaron Bromberg
Article
Multidisciplinary Sciences
Ohad Lib, Giora Hasson, Yaron Bromberg
Article
Optics
Wen Xiong, Brandon Redding, Shai Gertler, Yaron Bromberg, Hemant D. Tagare, Hui Cao
Article
Optics
Ohad Lib, Yaron Bromberg
Article
Optics
Shachar Resisi, Sebastien M. Popoff, Yaron Bromberg
Summary: When multimode optical fibers are perturbed, data transmission is disrupted, but a deep learning approach can recover input images successfully by utilizing hidden correlations in speckle patterns.
LASER & PHOTONICS REVIEWS
(2021)
Article
Physics, Multidisciplinary
Maxime W. Matthes, Yaron Bromberg, Julien de Rosny, Sebastien M. Popoff
Summary: Multimode optical fibers have shown potential in boosting optical communication data rates and reducing the invasiveness of endoscopic procedures, but are hindered by disorder. Researchers have introduced a framework to study and avoid the effect of disorder, identifying optical channels resilient to strong deformations induced by disorder.
Article
Optics
Ronen Shekel, Ohad Lib, Alon Sardas, Yaron Bromberg
Summary: This study demonstrates the use of a bright laser beam to control the spatial correlations between entangled photons for compensating their scattering by atmospheric turbulence. By optimizing the pump, the signal of entangled photons is enhanced by a factor of fifteen in simulated atmospheric turbulence conditions. This technique shows promise for realizing free-space quantum links with entangled photons.
Article
Quantum Science & Technology
Kfir Sulimany, Yaron Bromberg
Summary: This study demonstrates the generation of multimode photon pairs in a few-mode fiber using spontaneous four-wave mixing and verifies the correlation between photons in the fiber mode basis using an all-fiber mode sorter. This experiment provides an essential building block for realizing high-dimensional quantum protocols based on standard, commercially available fibers in an all-fiber configuration.
NPJ QUANTUM INFORMATION
(2022)
Article
Optics
Ohad Lib, Yaron Bromberg
Summary: This study introduces and demonstrates an incoherent light source based on phase-randomized spatially entangled photons, referred to as thermal biphotons, and discovers that the width of the HBT peak for thermal biphotons is determined by their correlations, violating the Siegert relation and disrupting the speckle-fluctuations interpretation. Furthermore, a connection between the HBT effect and coherent backscattering of light is established as an alternative interpretation of the results.
Article
Physics, Applied
Ohad Lib, Kfir Sulimany, Yaron Bromberg
Summary: High-dimensional entanglement plays a crucial role in quantum information science. In this study, a reconfigurable processor of entangled photons in high dimensions is demonstrated, overcoming the limitations of current devices. This achievement is made possible by using multiplane light conversion technology.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Multidisciplinary
Ohad Lib, Yaron Bromberg
Summary: This Perspective discusses the extent to which the quantum properties of light can be preserved and controlled in complex medium, and their relevance to applications in quantum communication and quantum computing.
Article
Physics, Multidisciplinary
Mamoon Safadi, Ohad Lib, Ho-Chun Lin, Chia Wei Hsu, Arthur Goetschy, Yaron Bromberg
Summary: In this study, it is discovered that multiply scattered entangled photons reflected from a dynamic complex medium remain partially correlated. Enhanced correlations are observed in experiments and full-wave simulations, which arise from the interference between scattering trajectories. This work points to opportunities for entanglement transport despite dynamic multiple scattering in complex systems.
Article
Optics
Zohar Finkelstein, Kfir Sulimany, Shachar Resisi, Yaron Bromberg
Summary: In recent years, there has been a growing interest in using multimode fibers for various technologies. However, challenges such as modal dispersion, mode coupling, and mechanical sensitivity have hindered their practical applications. In this study, we exploit these features to create reconfigurable spectral filters by applying computer-controlled deformations to the fiber. Using this approach, we demonstrate tunable bandpass filters and dual-band filters with exceptional spectral resolutions as low as 5 pm.
