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Relevant bibliographies by topics / Quantum-enhanced filtering

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Academic literature on the topic 'Quantum-enhanced filtering'

Author: Grafiati

Published: 2 June 2025

Last updated: 22 June 2025

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Journal articles on the topic "Quantum-enhanced filtering"

1

Sindugatta Nagaraja, Prajwalasimha, Naveen Kulkarani, Raghavendra M. Ichangi, et al. "QEMF for spatial domain pre-processing in iris biometrics: advancing accuracy and efficiency in recognition systems." Bulletin of Electrical Engineering and Informatics 14, no. 3 (2025): 1959–68. https://doi.org/10.11591/eei.v14i3.9036.

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This article presents a Quantum-Enhanced Median Filtering (QEMF) method for spatial domain pre-processing in iris biometrics, designed to improve image denoising and recognition accuracy. Traditional median filtering often struggles with high noise density, leading to inconsistencies in the denoised image. Our approach enhances the median filtering process by integrating quantum-inspired principles with statistical measures, combining median and average values of neighboring pixels. This hybrid strategy preserves the structural integrity of the original image while effectively reducing noise. Additionally, a quantum-based thresholding step is introduced in the final stage to minimize ambiguities and further enhance image quality. The proposed method is evaluated using approximately one hundred standard iris images from the Chinese University of Hong Kong (CUHK) dataset, considering four types of noise: Impulse, Poisson, Gaussian, and Speckle. Comparative analysis with conventional filters, including Median and Wiener filters, demonstrates that the QEMF method achieves 99.36% similarity to the original images, surpassing Median and Wiener filters by 1.32% and 0.34%, respectively. These results highlight the potential of quantum-enhanced filtering for improved denoising performance and increased efficiency in iris recognition systems.

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Xu, Rui, Lulu Huang, Jian Zhang, et al. "Nanostructured SnSe integrated with Se quantum dots with ultrahigh power factor and thermoelectric performance from magnetic field-assisted hydrothermal synthesis." Journal of Materials Chemistry A 7, no. 26 (2019): 15757–65. http://dx.doi.org/10.1039/c9ta03967h.

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Through magnetic field-assisted hydrothermal synthesis, high thermoelectric performance of SnSe is obtained due to Se quantum dots and smaller nano grains, leading to enhanced density of states and energy filtering effect.

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Ruiz, Virginia, Ana Pérez-Marquez, Jon Maudes, Hans-Jürgen Grande, and Nieves Murillo. "Enhanced photostability and sensing performance of graphene quantum dots encapsulated in electrospun polyacrylonitrile nanofibrous filtering membranes." Sensors and Actuators B: Chemical 262 (June 2018): 902–12. http://dx.doi.org/10.1016/j.snb.2018.02.081.

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4

BO, TAO, FU-LI LI, and YU FENG. "OMNIDIRECTIONAL FILTERING BASED ON ZERO-AVERAGED REFRACTIVE INDEX GAP IN PHOTONIC QUANTUM WELL STRUCTURES." Modern Physics Letters B 23, no. 25 (2009): 2943–53. http://dx.doi.org/10.1142/s021798490902103x.

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A photonic quantum well (PQW) structure based on the zero-averaged refractive index gap is constructed and the transmission properties are investigated. Quantized confined photonic states resulting from the photonic confinement effect are observed. We find that the resonant transmissions are not only weakly dependent on the incident angle but also insensitive to polarization of light. More importantly, the number of the confined photonic states can be controlled by simply adjusting the cell number of the well photonic crystal. It is shown that strong field localization is found when the well photonic crystal consists of positive-index material or single negative material. Particularly for the PQW structure containing single negative material, the field in the well region can be highly enhanced by modulating the size of the well photonic crystal. These peculiar features make this PQW structure superior to the conventional PQW structure in potential applications such as omnidirectional filtering and optical bistable switching.

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Anitha, Mary C. "Second-order polynomial interpolation filters for image demosaicking with perceptual-based tone mapping and quantum-inspired optimization." i-manager's Journal on Information Technology 13, no. 4 (2024): 25. https://doi.org/10.26634/jit.13.4.21521.

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An innovative method for image demosaicking is introduced, leveraging perceptual-based tone mapping, secondorder polynomial interpolation filters, and Quantum-Inspired Optimization to achieve superior image reconstruction quality. The proposed approach integrates an Autoregressive Wavelet Water Optimization (WWO) algorithm to determine coefficients for second-order polynomial filters within the LPA-ICI framework. Simultaneously, a Deep Convolutional Neural Network (Deep CNN) is employed to generate residual images, capturing intricate features. The outputs of the interpolation-based method and the Deep CNN are fused using an entropy-based metric, resulting in enhanced visual quality and reduced artifacts in the demosaicked images. Perceptual-based tone mapping is applied to address brightness discrepancies, ensuring luminance accuracy and improved image realism. Additionally, Quantum-Inspired Optimization enhances the efficiency and robustness of the filtering process. Experimental results demonstrate significant improvements in reconstruction accuracy, making the proposed method a promising alternative for applications requiring precise and visually appealing demosaicking. Future work will explore the extension of this method to multispectral images and address the challenges of real-time processing.

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Amorós-Binefa, Júlia, and Jan Kołodyński. "Noisy atomic magnetometry in real time." New Journal of Physics 23, no. 12 (2021): 123030. http://dx.doi.org/10.1088/1367-2630/ac3b71.

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Abstract Continuously monitored atomic spin-ensembles allow, in principle, for real-time sensing of external magnetic fields beyond classical limits. Within the linear-Gaussian regime, thanks to the phenomenon of measurement-induced spin-squeezing, they attain a quantum-enhanced scaling of sensitivity both as a function of time, t, and the number of atoms involved, N. In our work, we rigorously study how such conclusions based on Kalman filtering methods change when inevitable imperfections are taken into account: in the form of collective noise, as well as stochastic fluctuations of the field in time. We prove that even an infinitesimal amount of noise disallows the error to be arbitrarily diminished by simply increasing N, and forces it to eventually follow a classical-like behaviour in t. However, we also demonstrate that, ‘thanks’ to the presence of noise, in most regimes the model based on a homodyne-like continuous measurement actually achieves the ultimate sensitivity allowed by the decoherence, yielding then the optimal quantum-enhancement. We are able to do so by constructing a noise-induced lower bound on the error that stems from a general method of classically simulating a noisy quantum evolution, during which the stochastic parameter to be estimated—here, the magnetic field—is encoded. The method naturally extends to schemes beyond the linear-Gaussian regime, in particular, also to ones involving feedback or active control.

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7

Ferreri, Alessandro, Matteo Santandrea, Michael Stefszky, et al. "Spectrally multimode integrated SU(1,1) interferometer." Quantum 5 (May 27, 2021): 461. http://dx.doi.org/10.22331/q-2021-05-27-461.

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Nonlinear SU(1,1) interferometers are fruitful and promising tools for spectral engineering and precise measurements with phase sensitivity below the classical bound. Such interferometers have been successfully realized in bulk and fiber-based configurations. However, rapidly developing integrated technologies provide higher efficiencies, smaller footprints, and pave the way to quantum-enhanced on-chip interferometry. In this work, we theoretically realised an integrated architecture of the multimode SU(1,1) interferometer which can be applied to various integrated platforms. The presented interferometer includes a polarization converter between two photon sources and utilizes a continuous-wave (CW) pump. Based on the potassium titanyl phosphate (KTP) platform, we show that this configuration results in almost perfect destructive interference at the output and supersensitivity regions below the classical limit. In addition, we discuss the fundamental difference between single-mode and highly multimode SU(1,1) interferometers in the properties of phase sensitivity and its limits. Finally, we explore how to improve the phase sensitivity by filtering the output radiation and using different seeding states in different modes with various detection strategies.

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Jiang, Jia-Huei, Ning-Yuan Lue, Feng-Wu Chen, and Yu-Shu G. Wu. "All-electrical valley filtering in graphene systems (II): Numerical study of electron transport in valley valves." Journal of Applied Physics 132, no. 16 (2022): 164302. http://dx.doi.org/10.1063/5.0114389.

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This work performs a numerical study of electron transport through the fundamental logic gate in valleytronics—a valley valve consisting of two or increasing number of valley filters. Various typical effects on the transport are investigated, such as those due to interface scattering, long- and short-range impurity scattering, edge roughness, strain, inter-filter spacing, or increasing number of valley filters. For illustration, we consider the class of specific valves built from graphene quantum wire valley filters in single layer or bilayer graphene, with the filters subject to separate control of in-plane, transverse electric fields. The nearest-neighbor tight-binding model of graphene is used to formulate the corresponding transport problem, and the algorithm of the recursive Green's function method is applied to solve for the corresponding transmission coefficient. In the case of two-filter valves, the result explicitly demonstrates the existence of a pronounced on-off contrast in electron transmission between the two configurations of valves, namely, one with identical and the other with opposite valley polarities in the two constituent filters. The contrast is shown to be enhanced when increasing the number of filters in valves. Signatures of Fano–Fabry–Pérot type resonances in association with interface scattering and inter-filter spacing are illustrated. Electron backscattering due to impurities is found to be sizably suppressed, with the valve performance showing considerable robustness against edge roughness scattering. On the other hand, the presence of a uniaxial strain modifies the electron transmission and results in an interesting quasi-periodic modulation of transmission as we vary the strain strength.

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Tsarev, Sergey, Daria Proniakova, Xuqi Liu, et al. "Vertically stacked monolithic perovskite colour photodetectors." Nature 642, no. 8068 (2025): 592–98. https://doi.org/10.1038/s41586-025-09062-3.

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Abstract Modern colour image sensors face challenges in further improving sensitivity and image quality because of inherent limitations in light utilization efficiency1. A major factor contributing to these limitations is the use of passive optical filters, which absorb and dissipate a substantial amount of light, thereby reducing the efficiency of light capture2. On the contrary, active optical filtering in Foveon-type vertically stacked architectures still struggles to deliver optimal performance owing to their lack of colour selectivity, making them inefficient for precise colour imaging3. Here we introduce an innovative architecture for colour sensor arrays that uses multilayer monolithically stacked lead halide perovskite thin-film photodetectors. Perovskite bandgap tunability4 is utilized to selectively absorb the visible light spectrum’s red, green and blue regions, eliminating the need for colour filters. External quantum efficiencies of 50%, 47% and 53% are demonstrated for the red, green and blue channels, respectively, as well as a colour accuracy of 3.8% in ΔE Lab outperforming the state-of-the-art colour-filter array and Foveon-type photosensors. The image sensor design improves light utilization in colour sensors and paves the way for the next generation of highly sensitive, artefact-free images with enhanced colour fidelity.

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10

Merzoq, Mohannad A., and Jenan M. Al-Mukh. "Theoretical Study for Spin Transport properties of FM-(G/C)10- FM." Basrah Researches Sciences 50, no. 1 (2024): 12. http://dx.doi.org/10.56714/bjrs.50.1.6.

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In the present study, we propose a physical model to study spin transport through DNA system and provide apparent physical mechanism for spin dependent phenomenon. The system considered in our work is DNA bases guanine-cytosine coupled to two ferromagnetic leads (FM-(G/C)10-FM) in parallel and anti-parallel configuration case, throughout magnetic quantum contacts. Our treatment is based on the tight binding model to derive obvious formula for the transmission spectrum which is employed to investigate the spin dependent current-bias voltage characteristics and the temperature - Conductance dependence. Our calculations of for strong, weak and without backbone regimes. Various factors are involved in our -study. These are the electrical contacts between DNA molecules and electrodes, the structure of DNA molecule and the environment around DNA molecule. The system spin dependent factors, that are investigated extensively in our study include the spin dependent coupling between subsystems, the quantum contacts between active region and electrodes, majority and minority electrons spin in the ferromagnetic leads as well as externally applied bias voltage. Variation of these factors can enhanced or suppressed spin transport through (G/C)10 molecule. The transmission spectrum calculations conform that the spin transport throughout (G/C)10 originates by a coherent tunneling process between neighboring bases through the overlapping of the LUMO orbitals of the bases. Our results showed that the spin-polarized transport that can be effectively regulated by the type of regime as well as the spin configuration in the leads which can exhibit efficient spin filtering and spin switching by employing the spin blockade phenomenon

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Conference papers on the topic "Quantum-enhanced filtering"

1

A J, Dazzle, Shashank Singh, Dishant Naik, and Sujithra Kanmani R. "Advancing E-commerce Recommendations: A Comparative Study of BERT-Enhanced Collaborative Filtering and Alternative Approaches." In 2024 International Conference on Artificial Intelligence and Quantum Computation-Based Sensor Application (ICAIQSA). IEEE, 2024. https://doi.org/10.1109/icaiqsa64000.2024.10882202.

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Vineeshkumar, T. V., S. Prasanth, R. Pragash, N. V. Unnikrishnan, and C. Sudarsanakumar. "Structural, optical and enhanced power filtering application of PEG capped Zn1-xCoxS quantum dots." In DAE SOLID STATE PHYSICS SYMPOSIUM 2017. Author(s), 2018. http://dx.doi.org/10.1063/1.5028751.

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Dmitriev, Artemiy, Haixing Miao, Jiri Smetana, and Denis Martynov. "A table-top optical interferometer with shot-noise sensitivity enhanced by optomechanical phase-insensitive quantum filtering." In Quantum Sensing, Imaging, and Precision Metrology, edited by Selim M. Shahriar and Jacob Scheuer. SPIE, 2023. http://dx.doi.org/10.1117/12.2650385.

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4

Holló, Csaba Tamás, Tamás Sarkadi, Máté Galambos, et al. "Compact, Portable, Fiber-Coupled Correlated Photon Pair Source with Enhanced Performance." In Quantum 2.0. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/quantum.2022.qtu2a.18.

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Our recently published photon source has been enhanced in terms of robustness and spectral width. Thanks to a custom breadboard rigidity increased by 350%, due to 10nm spectral filtering the heralding ratio grew to 39%.

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5

Coscelli, E., F. Poli, T. T. Alkeskjold, M. Jorgensen, A. Cucinotta, and S. Selleri. "Enhanced thermal-effect resilience in distributed modal filtering large mode area photonic crystal fibers." In 2013 Conference on Lasers & Electro-Optics. Europe & International Quantum Electronics Conference (CLEO EUROPE/IQEC). IEEE, 2013. http://dx.doi.org/10.1109/cleoe-iqec.2013.6801370.

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Khodabakhsh, Amir, Lucile Rutkowski, Jerome Morville, Alexandra C. Johansson, Grzegorz Sobon та Aleksandra Foltynowicz. "Cavity-enhanced continuous-filtering vernier spectroscopy at 3.3 μm using a femtosecond optical parametric oscillator". У 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE, 2017. http://dx.doi.org/10.1109/cleoe-eqec.2017.8086857.

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