Article
Multidisciplinary Sciences
Shuhe Wu, Guzhi Bao, Jinxian Guo, Jun Chen, Wei Du, Minwei Shi, Peiyu Yang, Liqing Chen, Weiping Zhang
Summary: In the past few decades, optical magnetometry has made remarkable progress in sensitivity, but is limited by spin projection noise, photon shot noise, and magnetic noise. In this study, a quantum magnetic gradiometer with sub-shot-noise sensitivity is demonstrated using entangled twin beams, showing great potential for developing sensitive magnetometry in noisy environments.
Article
Optics
Qing Xu
Summary: Quantum decoherence is the main obstacle to realizing quantum information processing, as it brings about the emergence of classical phenomena from the quantum world. However, we propose that decoherence can enable the creation of a bright source of strongly sub-Poissonian nonlocality. The adjustable and manipulable decoherence is achieved through the dressed-atom approach and combination mode technique. The strong sub-Poissonianity and robust Bell violation originate from the large squeezing parameter of the reservoir within the framework of reservoir theory.
Article
Optics
A. Kovalenko, D. Babjak, A. Lesundak, L. Podhora, L. Lachman, P. Obsil, T. Pham, O. Cip, R. Filip, L. Slodicka
Summary: This article presents an experimental characterization of indistinguishable photons from a finite and stable ensemble of trapped ions. The study explores the second-order correlation and super-Poissonian statistics of these photons, shedding light on the emergence and control of super-Poissonian light at the atomic scale through photon indistinguishability. This research provides unique insights and tools for generating and manipulating super-Poissonian light at the most microscopic level.
Article
Optics
Qianwei Zhou, Mingze Liu, Wenqi Zhu, Lu Chen, Yongze Ren, Henri J. Lezec, Yanqing Lu, Amit Agrawal, Ting Xu
Summary: By utilizing a single-layer dielectric metasurface, the broadband generation of PVBs across the entire visible spectrum is demonstrated, with their perfect characteristics verified through rigorous optimization of structural parameters. Additionally, it is shown that the ellipticity and diameter of a PVB can be controlled by adjusting the structural parameters of the metasurface, increasing the design flexibility.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Jan Perina, Vaclav Michalek, Radek Machulka, Ondrej Haderka
Summary: The research shows that the twin beams exhibit anticorrelations in photon-number fluctuations in the signal and idler beams under specific conditions, with sub-Poissonian photon-number statistics. The postselected fields are reconstructed from experimental data using the maximum likelihood method, and their nonclassical properties are analyzed and quantified using appropriate criteria. Comparisons are made between the postselected fields obtained with actual and ideal photon-number-resolved detectors.
Article
Physics, Applied
Shiyuan Zhao, Frederic Grillot
Summary: This paper theoretically investigates the possibility of generating amplitude-squeezed light with high-quantum-efficiency interband cascade lasers, and shows that it can achieve considerable amplitude squeezing over a large bandwidth. The results have important implications for midinfrared quantum photonic applications.
PHYSICAL REVIEW APPLIED
(2022)
Article
Physics, Applied
Yao Zhou, Zhen-Qiang Yin, Rui-Qiang Wang, Shuang Wang, Wei Chen, Guang-Can Guo, Zheng-Fu Han
Summary: This article proposes a TF QKD protocol with partial phase postselection, which maintains the advantage of high key rate while improving performance. Numerical simulations confirm the potential advantages of this protocol in terms of key rate and achievable distance.
PHYSICAL REVIEW APPLIED
(2022)
Article
Optics
Jiaxin Li, Xueyu Chen, Ziang Lin, Zhiqiang Xie, Yanliang He, Ying Li, Dianyuan Fan, Shuqing Chen
Summary: A polarization-independent and broadband hollow Gaussian beam (HGB) generation method is proposed and demonstrated using cascaded dielectric metasurface q-plates. This method is applicable to visible light and beneficial for fundamental research on HGBs.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Optics
Mingyuan Hong, Ashe Miller, Roberto de J. Leon-Montiel, Chenglong You, Omar S. Magana-Loaiza
Summary: The study demonstrates the production of light beams with various photon statistics through the spatial modulation of coherent light, allowing for the shaping of spatial light modes with engineered photon statistics at different spatial positions.
LASER & PHOTONICS REVIEWS
(2023)
Article
Astronomy & Astrophysics
Han Wei Ang, Maciej Rybczy, Grzegorz Wilk, Zbigniew Wlodarczyk
Summary: In this work, we demonstrate that the multiplicity distributions of charged particles produced in jets measured in the ATLAS experiment at the LHC are sub-Poissonian. We also show that by analyzing these distributions using recurrence relations and combinants, we can obtain new and otherwise unavailable information, which can enhance our understanding of the particle production mechanism.
Article
Multidisciplinary Sciences
Douglas E. Weidemann, James Holehouse, Abhyudai Singh, Ramon Grima, Silke Hauf
Summary: Gene expression inherently gives rise to stochastic variation (noise) in the production of gene products. Minimizing noise is crucial for reliable cellular functions. In this study, the researchers demonstrate that several cell division genes in fission yeast exhibit mRNA variances significantly below the assumed limit of Poissonian noise, which is explained by a gene expression model incorporating multiple transcription and mRNA degradation steps. This finding redefines the lower limit of eukaryotic gene expression noise and uncovers molecular requirements for achieving ultralow noise.
Article
Physics, Multidisciplinary
Mansi Baliyan, Allarakha Shikder, Naveen K. Nishchal
Summary: In this study, a simple experimental setup using a single phase-only SLM has been proposed to achieve complex light modulation. By encoding two cascaded phase value distributions onto the SLM, both amplitude and phase modulation of light beam can be achieved, enabling wavefront shaping. The feasibility of the proposed technique has been verified, and commonly known singular beams such as Laguerre-Gaussian and Bessel-Gaussian modes have been successfully generated.
Article
Optics
Yuhua Xie, Rufei Long, Zuhai Ma, Youzhi Shi, Jiahao Hong, Jiadong Wu, Chujun Zhao, Dianyuan Fan, Yu Chen
Summary: The generation of sub-200 fs pulsed vortex beams (VBs) at 1.7 μm was successfully achieved through a homemade mode-selective coupler, and cylindrical vector beams (CVBs) can also be obtained by controlling the linear superposition.
Article
Optics
Zhuang Wang, Zheng Yuan, Yuan Gao, Wenxiang Yan, Chunjuan Liang, Zhi-Cheng Ren, Xi-Lin Wang, Jianping Ding, Hui-Tian Wang
Summary: This study introduces a novel curvilinear optical vortex beam called twin curvilinear vortex beams (TCVBs), with specific intensity and phase distribution, and demonstrates its potential applications in optical tweezers through simulation and experiment.
Article
Optics
Petr Bouchal, Zdenek Bouchal
Summary: Twisted vector light beams can be generated by spiral phase modulation of light reflected by dielectric spheres, similar to the generation of optical vortices using liquid crystals and plasmonic metasurfaces. This discovery was demonstrated through holographic imaging of primary and secondary rainbows, proving the existence of spiral geometric phase. The study also confirmed that individual water drops can generate vector vortex beams under circularly polarized illumination, and spherical reflectors can serve as simple generators of vector vortex beams and vortex arrays, inspiring new geometric-phase elements.
LASER & PHOTONICS REVIEWS
(2022)
Article
Physics, Applied
M. Drong, T. Fordos, H. Y. Jaffres, J. Perina, K. Postava, P. Ciompa, J. Pistora, H-J Drouhin
Summary: This study presents a semiclassical model for spin-injected vertical-cavity surface-emitting lasers with local optical anisotropies, focusing on highly anisotropic spin lasers. A generalized matrix formalism for extracting laser modes and a coupled-mode theory for studying time dependence of laser modes are introduced. The theory, based on circularly polarized optical modes, demonstrates advantages in designing and optimizing spin-VCSEL structures with high-contrast gratings for applications in terahertz range polarization modulation and compact terahertz sources.
PHYSICAL REVIEW APPLIED
(2021)
Article
Optics
Jan Perina, Vaclav Michalek, Radek Machulka, Ondrj Haderka
Summary: Selective post-selection of one beam out of a system of three correlated beams with bi-partite photon-number correlations leads to joint photon-number distributions with checkered patterns. The experimental and theoretical analysis shows nonclassical properties of these states as they vary with the ratio of correlated and anti-correlated contributions, confirmed by 2D histograms reconstructed by maximum-likelihood approach. The investigations suggest potential applications in two-photon excitations of atoms and molecules as well as two-photon spectroscopy.
Article
Physics, Multidisciplinary
Joanna K. Kalaga, Wieslaw Leonski, Radoslaw Szczesniak, Jan Perina
Summary: We investigate the relationship between the states of three-qubit systems and linear entropy, as well as measures of coherence such as degree of coherence, first- and second-order correlation functions. We demonstrate that qubit-qubit states exhibit strong entanglement when the linear entropy falls within a certain range of values. Additionally, we derive the conditions for the boundary values of linear entropy, which are parameterized by measures of coherence.
Article
Engineering, Electrical & Electronic
Mariusz Drong, Maciej Dems, Jan Perina, Tibor Fordos, Henri-Yves Jaffres, Kamil Postava, Henri-Jean Drouhin
Summary: This study presents a theoretical framework that combines the laser rate equations and cavity perturbation theory for micro-cavity lasers with optical anisotropies. By deriving polarization-resolved coupled-mode equations, the method offers physical insights and accuracy comparable to finite-difference time-domain methods, saving time and suitable for semi-analytic studies.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Shilan Abo, Grzegorz Chimczak, Anna Kowalewska-Kudlaszyk, Jan Perina, Ravindra Chhajlany, Adam Miranowicz
Summary: We describe a novel type of blockade, called hybrid photon-phonon blockade, generated by linear coupling of photonic and phononic modes. By mixing the photonic and phononic modes, which do not exhibit blockade individually, we are able to generate the hybrid photon-phonon blockade.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Multidisciplinary
Artur Barasinski, Jan Perina Jr, Antonin Cernoch
Summary: Identification and quantification of quantum correlations are crucial for understanding and manipulating quantum devices and processes. We have developed and implemented a general method to quantify different forms of quantum correlations using experimental intensity moments up to the fourth order. These moments allow for the precise determination of global and marginal impurities of two-beam Gaussian fields, enabling the assessment of steering, tight lower and upper bounds for negativity, and the use of Kullback-Leibler divergence as a quantifier for nonseparability. The method has been successfully demonstrated on experimental twin beams and squeezed super-Gaussian beams. It can be readily applied to characterize quantum correlations in multibeam Gaussian fields.
PHYSICAL REVIEW LETTERS
(2023)
Article
Quantum Science & Technology
Jan Perina, Adam Miranowicz, Grzegorz Chimczak, Anna Kowalewska-Kudtaszyk
Summary: This paper discusses equivalent approaches to determine the eigenfrequencies of the Liouvillians of open quantum systems using the solution of the Heisenberg-Langevin equations and the corresponding equations for operator moments. The equivalence of both approaches is demonstrated by analyzing a simple damped two-level atom. The presented approach via the Heisenberg-Langevin equations reveals the structure and eigenfrequencies of quantum exceptional and diabolical points.
Article
Optics
Mariusz Drong, Jan Perina, Tibor Fordos, Henri Y. Jaffres, Kamil Postava, Henri-Jean Drouhin
Summary: It is found that spin-injected vertical-cavity surface-emitting lasers (spin-VCSELs) exhibit interesting functionalities when considering the linear gain anisotropy. Using the extended spin-flip model (SFM), exceptional points (EPs) are predicted in spin-VCSELs along with two interesting phenomena: polarization switching and frequency comb generation. These effects have great technological potential and are not limited to spin-VCSEL technology. The concept of anisotropy-engineered non-Hermitian microlasers and their polarization dynamics near EPs are discussed.
Proceedings Paper
Optics
Kishore Thapliyal, Jan Perina
Summary: This article systematically analyzes the generation of Stokes-anti-Stokes photon pairs in Raman scattering and provides suitable conditions for photon pair generation. In addition to the Raman active material properties and pump power, non-zero mean phonon number and losses in the phonon mode are also relevant parameters. Raman active materials with stronger anti-Stokes coupling are suitable for photon pair generation, even for non-zero thermal phonons as long as phonon losses are negligible.
22ND POLISH-SLOVAK-CZECH OPTICAL CONFERENCE ON WAVE AND QUANTUM ASPECTS OF CONTEMPORARY OPTICS
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Mariusz Drong, Jan Perina, Maciej Dems, Tomasz G. Czyszanowski, Tibor Fordos, Henri Jaffres, Kamil Postava, Henri-Jean M. Drouhin
Summary: We present a nonlinear coupled-mode theory for anisotropic microcavity lasers, particularly for birefringent spin-lasers. The model can be used to investigate the effects of spin modulation and grating parameters on the performance of realistic grating-based spin-lasers.
QUANTUM SENSING AND NANO ELECTRONICS AND PHOTONICS XVIII
(2022)
Article
Optics
Jan Perina, Pavel Pavlicek, Vaclav Michalek, Radek Machulka, Ondrej Haderka
Summary: This study derives nonclassicality criteria for general N-dimensional optical fields, which involve intensity moments, photon-number distribution probabilities, or combinations of both. The Hillery criteria for sums of even or odd photon numbers are generalized to N-dimensional fields. These criteria are then applied to an experimental three-mode optical field containing two types of photon-pair contributions, and the accompanying nonclassicality depths are used for performance comparison.
Article
Optics
Jan Perina, Vaclav Michalek, Radek Machulka, Ondrej Haderka
Summary: The research shows that the twin beams exhibit anticorrelations in photon-number fluctuations in the signal and idler beams under specific conditions, with sub-Poissonian photon-number statistics. The postselected fields are reconstructed from experimental data using the maximum likelihood method, and their nonclassical properties are analyzed and quantified using appropriate criteria. Comparisons are made between the postselected fields obtained with actual and ideal photon-number-resolved detectors.
Article
Optics
Kishore Thapliyal, Jan Perina
Summary: The quantum model of the Raman process examines nonclassical correlations between photons in the Stokes and anti-Stokes fields, analyzing the impact of various parameters on these correlations. The study also reveals conditions for the Stokes and anti-Stokes fields to be composed of only photon pairs, allowing for nonzero mean thermal phonon numbers.