Article
Optics
Jiho Park, Heonoh Kim, Han Seb Moon
Summary: This study demonstrates a second-order interference experiment using thermal light from a warm atomic ensemble in two spatially separated unbalanced Michelson interferometers. The bright thermal light used for second-order interference is emitted via collective two-photon coherence in Doppler-broadened cascade-type Rb-87 atoms. The results suggest that the temporal waveforms of the interfering thermal light in the two spatially separated interferometers exhibit similarities with time-energy entangled photon pairs in Franson interferometry.
PHOTONICS RESEARCH
(2021)
Article
Optics
Yuchen He, Yu Zhou, Jianbin Liu, Sheng Luo, Huaibin Zheng, Hui Chen, Yanyan Liu, Fuli Li, Zhuo Xu
Summary: In this paper, the theoretical and numerical study of two-photon interference of broadband chaotic light in a Michelson interferometer was conducted with the consideration of polarizations. The research shows that polarization can tune the second-order interference pattern, acting as switches to manipulate the interference process and opening up possibilities for new experimental schemes.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2022)
Article
Optics
Sheng Luo, Yu Zhou, Huaibin Zheng, Jianbin Liu, Hui Chen, Yuchen He, Wanting Xu, Shuanghao Zhang, Fuli Li, Zhuo Xu
Summary: This study proposes a method to achieve the superbunching effect with chaotic light, exceeding the theoretical limit. The development of two-photon superbunching theory and prediction that coherence can be greater than 2 after chaotic light propagates multiple times in the CMI are in agreement with experimental results. Additionally, a weak signal detection setup using chaotic light circulating in a CMI is proposed to greatly increase sensitivity.
Article
Mathematics
Nawal AL-Zaid, Amani AL-Refaidi, Huda Bakodah, Mariam AL-Mazmumy
Summary: This paper introduces a method for solving two-point boundary-value problems involving second- and higher-order nonlinear ordinary differential equations, and demonstrates its efficacy on numerous test problems, achieving a high level of exactitude between the obtained approximate solution and the available exact solution.
Article
Engineering, Mechanical
D. Dooner, R. Garcia-Garcia, J. M. Rico
Summary: It is established that generalized spatial motion of a rigid body can be defined by two axodes: a fixed axode and a moving axode. These axodes are unique ruled surfaces that roll and slide upon each other. Two instantaneous invariants, relative angular displacement and relative axial displacement, are presented to define the relative motion between the two axodes. An induced curvature is introduced to quantify the combined rolling and sliding displacement, and two osculating hyperboloids are established to create a skew axis gear pair. This study demonstrates the concept of generalized axodes, instantaneous invariants, induced curvature, and osculating hyperboloids using a skew axis gear set with elliptical motion.
MECHANISM AND MACHINE THEORY
(2023)
Article
Mathematics, Interdisciplinary Applications
Qijia Yao, Fawaz W. Alsaade, Mohammed S. Al-zahrani, Hadi Jahanshahi
Summary: This article presents a fixed-time neural control methodology for the output-constrained synchronization of second-order chaotic systems with unknown parameters and perturbations. The controller is synthesized under the fixed-time backstepping control framework. The barrier Lyapunov function (BLF) is introduced in the virtual control law design to handle the output constraints. The neural network (NN) is embedded in the actual control law design to identify the total unknown item. Stability analysis shows that the resultant closed-loop system is practically fixed-time stable.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Physics, Multidisciplinary
F. Borselli, M. Maiwoeger, T. Zhang, P. Haslinger, V Mukherjee, A. Negretti, S. Montangero, T. Calarco, I Mazets, M. Bonneau, J. Schmiedmayer
Summary: The experiment demonstrates a source of correlated atom pairs with opposite momenta and spatial modes forming a Bell state, characterized by strong number squeezing and genuine two-particle interference in the emitted atom beams.
PHYSICAL REVIEW LETTERS
(2021)
Article
Computer Science, Information Systems
Ta-Chien Yeh, Jean-Fu Kiang
Summary: In this work, second-order chaotic maps with optimized random coefficients are proposed for image encryption. The optimal chaotic maps are found using screening conditions and a particle swarm optimization algorithm. Key sensitivity analysis confirms the high security of the optimal chaotic maps. A hybrid sequence generation scheme is also proposed to reduce image encryption time.
Article
Optics
Agnes George, Andrew Bruhacs, A. Aadhi, William E. Hayenga, Rachel Ostic, Erin Whitby, Michael Kues, Zhiming M. Wang, Christian Reimer, Mercedeh Khajavikhan, Roberto Morandotti
Summary: This paper presents a new method to investigate the temporal dynamics of photon statistics associated with nanolaser emission without the need for spectral filtering. By optically pumping the nanolasers with nanosecond pulses, coherence transitions from thermal emission to lasing are observed in the gathered time-resolved photon statistics.
LASER & PHOTONICS REVIEWS
(2021)
Article
Physics, Applied
Jianghua Li, Chengwu Xie, Wenhong Wang, Xiao-Ping Li, Gang Zhang, Xiaotian Wang
Summary: In recent years, there has been considerable interest in 2D second-order topological insulators (SOTIs) due to their unique properties. However, only the FeSe monolayer has been reported as a candidate for 2D intrinsic antiferromagnetic SOTIs. In this study, NiRuCl6 is proposed as a candidate for 2D antiferromagnetic SOTIs with corner states strictly at the Fermi level.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Meitong Yu, Hongxiang Wang, Yuefeng Ji
Summary: An optical phase chaos and mutual injection chaos synchronization scheme based on second order differential feedback electro-optical loop is proposed in this paper for chaotic communication. The scheme achieves large-capacity secure optical chaos communication, with wide bandwidth, good time delay suppressing performance, and high-speed transmission.
OPTICS AND LASER TECHNOLOGY
(2024)
Article
Chemistry, Physical
Lixin Lu, Hang Hu, Andrew J. Jenkins, Xiaosong Li
Summary: As relativistic corrections become stronger for late-row elements, the fully perturbative treatment may not be adequate for accurate descriptions of chemical properties. In this work, a determinant-based Kramers-unrestricted exact-two-component multi-reference second-order perturbation method is introduced, which includes relativistic corrections with a perturbative dynamic correlation.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2022)
Article
Geochemistry & Geophysics
Wenchang Han, Feng Zhou
Summary: In this study, we propose a method based on the masked second-order multisynchrosqueezing transform (MSST2) to effectively extract wideband interference (WBI) from corrupted synthetic aperture radar (SAR) data. Experimental results demonstrate the superior performance and practicability of the proposed method.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Computer Science, Information Systems
Krishna Kumar, Satyabrata Roy, Umashankar Rawat, Astitv Shandilya
Summary: This paper proposes a novel lightweight image encryption technique that combines Second-Order Cellular Automata (SOCA) and a chaotic map. The proposed scheme achieves a high encryption speed and low computational complexity, making it suitable for real-time applications and resource-constrained devices. Extensive experimental results demonstrate its effectiveness and robustness against various attacks.
MULTIMEDIA TOOLS AND APPLICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Jia-Lin Li, Jun-Fang Wu, Chao Li
Summary: This article demonstrates the nonlinear optical effects based on topological resonators, achieving second-harmonic generation (SHG) through the nonlinear interactions between two different types of topological corner modes. These corner modes possess ultrahigh Q factors and large modal overlap factor, simultaneously satisfying the doubly resonant condition for efficient SHG. These findings extend our understanding of nonlinear interactions between higher-order corner modes in a broader framework and have potential applications in topologically-protected imaging and sensing.
RESULTS IN PHYSICS
(2023)
Article
Physics, Mathematical
Rocco Maggi, Elisa Ercolessi, Paolo Facchi, Giuseppe Marmo, Saverio Pascazio, Francesco V. Pepe
Summary: In this article, one- and two-dimensional models for classical electromagnetism are derived using Hadamard's method of descent. Low-dimensional electromagnetism is considered as a specialization of the higher-dimensional one, where the fields are uniform along the additional spatial directions.
JOURNAL OF MATHEMATICAL PHYSICS
(2022)
Article
Chemistry, Analytical
Gianlorenzo Massaro, Francesco Di Lena, Milena D'Angelo, Francesco V. Pepe
Summary: In this study, we examined the properties of the correlation function in diffraction-limited light-field imaging under realistic experimental conditions using theory and simulation. We also provided an expression to evaluate the pixel-limited resolution of the refocused images, as well as a strategy for eliminating artifacts introduced by the finite size of the optical elements.
Article
Physics, Multidisciplinary
Francesco V. Pepe, Giovanni Scala, Gabriele Chilleri, Danilo Triggiani, Yoon-Ho Kim, Vincenzo Tamma
Summary: We demonstrate the distance sensitivity of thermal light second-order interference beyond spatial coherence. This kind of interference is closely related to the degree of correlation of the measured interference pattern and can preserve sensitivity to distances even in the presence of turbulence.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Physics, Multidisciplinary
Giuliano Angelone, Elisa Ercolessi, Paolo Facchi, Davide Lonigro, Rocco Maggi, Giuseppe Marmo, Saverio Pascazio, Francesco Pepe
Summary: We study the physics of a spin-(2)/(1) fermion coupled to the electromagnetic field in two spatial dimensions, by reducing it from three dimensions using Hadamard's method of descent. We investigate both the free case, determined by the Dirac equation, and the case of coupling with a dynamical EM field, governed by the Dirac-Maxwell equations. We observe that invariance along one spatial direction leads to the decoupling of the free Dirac equation into two independent theories. However, the dimensional reduction in the presence of an EM field results in a more complex 2 + 1-dimensional theory, where the method of descent is extended by employing the covariant derivative. Equations simplify, but decoupling between different physical sectors occurs only with specific classes of solutions.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
R. Castriconi, L. Placidi, M. Avanzo, R. Cirio, P. Gallo, A. Mazzilli, A. Milano, T. Rancati, P. Russo, C. Garibaldi
Summary: The FutuRuS working group of AIFM conducted a survey (SicAS) to gather feedback from its members regarding their interest and experience in scientific activities. The results showed a high relevance of MPEs' involvement in scientific activities, but many members devoted less time and expressed dissatisfaction due to lack of time and mentoring.
PHYSICA MEDICA-EUROPEAN JOURNAL OF MEDICAL PHYSICS
(2023)
Article
Physics, Multidisciplinary
Vincenzo Tamma, Simon Laibacher
Summary: Multiphoton interference is an essential phenomenon in quantum optics and quantum information processing, especially in boson sampling experiments. However, generating a large number of photons with fixed spectral properties from one experimental run to another is challenging. This study introduces a random multiplexing technique to enhance the success rate of generating samples and overcome the drawbacks of standard multiplexing. The results shed new light on the computational complexity of multiboson interference and improve the scalability of boson sampling schemes.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Physics, Multidisciplinary
Davide Lonigro, Rocco Maggi, Giuliano Angelone, Elisa Ercolessi, Paolo Facchi, Giuseppe Marmo, Saverio Pascazio, Francesco V. Pepe
Summary: The general properties of the dimensional reduction of the Dirac theory in Minkowski spacetime with an arbitrary number of spatial dimensions are investigated in this study. Hadamard's method of descent is applied, treating low-dimensional theories as specializations of high-dimensional theories that are uniform along the additional space coordinate. It is shown that the Dirac equation reduces to either a single Dirac equation or two decoupled Dirac equations, depending on the even or odd spatial dimensions of the higher-dimensional manifold, respectively. Furthermore, an explicit hierarchy of representations is constructed and discussed, demonstrating the manifest and iterative nature of this procedure.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Polymer Science
Alfio Torrisi, Lorenzo Torrisi, Mariapompea Cutroneo, Alena Michalcova, Milena D'Angelo, Letteria Silipigni
Summary: Thin sheets of UHMWPE with different concentrations of CNTs or Fe2O3 NPs were prepared and confirmed by microscopy and spectroscopic techniques. ATR-FTIR and UV-Vis spectroscopy were used to investigate the effects of the embedded nanostructures on the UHMWPE samples. The optical absorption increased regardless of the type of embedded nanostructures, and the optical energy gap decreased with increasing CNT or Fe2O3 NP concentrations.
Article
Physics, Applied
Danilo Triggiani, Giorgos Psaroudis, Vincenzo Tamma
Summary: We achieve the highest sensitivity allowed by quantum physics in estimating the time delay between two photons by observing their interference at a beam splitter through frequency-resolving sampling measurements. This sensitivity can be greatly enhanced even when traditional two-photon interferometers fail, by reducing the photonic temporal bandwidth, without the need for altering the path of the reference photon or using high-resolution time-resolving detectors. Potential applications include imaging nanostructures, including biological samples, and using frequency-resolved boson sampling in optical networks for enhanced estimation based on quantum principles.
PHYSICAL REVIEW APPLIED
(2023)
Article
Physics, Multidisciplinary
Francesco Scattarella, Gianlorenzo Massaro, Bohumil Stoklasa, Milena D'Angelo, Francesco V. Pepe
Summary: The measurement of spatio-temporal correlations of light is an interesting tool that overcomes the trade-off between spatial resolution and depth of field in standard imaging. Correlation plenoptic imaging allows for detection of spatial distribution and direction of light in a scene, achieving the fundamental limit imposed by wave optics for resolution and depth of field. This work investigates the resolution limit of a specific correlation plenoptic imaging scheme using periodic test patterns, providing analytical insights into the resolution properties of this second-order imaging technique compared to standard imaging.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Multidisciplinary Sciences
Gianlorenzo Massaro, Paul Mos, Sergii Vasiukov, Francesco Di Lena, Francesco Scattarella, Francesco V. Pepe, Arin Ulku, Davide Giannella, Edoardo Charbon, Claudio Bruschini, Milena D'Angelo
Summary: The correlation properties of light can overcome the limitations of traditional imaging techniques. Correlation plenoptic imaging (CPI), which uses correlated photons from entangled or chaotic sources, addresses the poor spatial resolution and limited change of perspective in conventional light-field imaging. However, the application potential of high-resolution imaging modalities relying on photon correlations is limited by the need for a large number of frames. This article presents a solution by utilizing photon number correlations in chaotic light combined with a cutting-edge ultrafast sensor, enabling the acquisition of 10 volumetric images per second.
SCIENTIFIC REPORTS
(2023)
Proceedings Paper
Quantum Science & Technology
Davide Giannella, Gianlorenzo Massaro, Francesco Di Lena, Francesco Scattarella, Alessio Scagliola, Sergii Vasiukov, Augusto Garuccio, Francesco V. Pepe, Milena D'Angelo
Summary: Correlation light-field microscopy (CLM), a novel approach to three-dimensional optical microscopy, exploits correlations between intensity fluctuations in chaotic light to retrieve both spatial and angular information about the sample. It extends the depth of field and maintains high spatial resolution, enabling scanning-free three-dimensional reconstruction. The integration of SPAD array sensors can enhance the acquisition speed of CLM.
QUANTUM COMMUNICATIONS AND QUANTUM IMAGING XX
(2022)
Proceedings Paper
Quantum Science & Technology
Gianlorenzo Massaroa, Francesco Di Lena, Davide Giannellaa, Francesco Pepea, Francesco Scattarella, Sergii Vasyukov, Milena D'Angelo
Summary: This article demonstrates the use of photon correlations to overcome the limitations of conventional plenoptic imaging devices and achieve quantum-enhanced plenoptic imaging. Experimental results show an unprecedented combination of resolution, depth of field, refocusing capability, and depth extension. Significant advancements in acquisition speed are also discussed, achieved through both hardware and software solutions.
QUANTUM COMMUNICATIONS AND QUANTUM IMAGING XX
(2022)
Proceedings Paper
Instruments & Instrumentation
Danilo Triggiani, Vincenzo Tamma
Summary: In this study, we present an estimation scheme that achieves Heisenberg-scaling sensitivity in estimating the average of optical phases in a Mach-Zehnder interferometer. This scheme utilizes a single squeezed vacuum state and homodyne detection at a single output port. We demonstrate that, to achieve this quantum advantage, only classical prior knowledge about the two phases is required, which can be obtained with a classical estimation strategy limited by shot-noise precision.
OPTICAL AND QUANTUM SENSING AND PRECISION METROLOGY II
(2022)
Article
Optics
Dario Gatto, Paolo Facchi, Vincenzo Tamma
Summary: This paper introduces a quantum metrological protocol based on a Mach-Zehnder interferometer, utilizing squeezed vacuum input state and antisqueezing operation to enhance sensitivity in detection. The protocol is robust to detector inefficiencies and photon losses occurring before the antisqueezing operation.
