Annalen der Physik最新文献

{"title":"Zn-4-Aminopyridine Coordination Compound as a Novel Saturable Absorber in Ho-Doped Fiber Laser System","authors":"Khalil Kamaruzzaman,&nbsp;Harith Ahmad,&nbsp;Norazriena Yusoff,&nbsp;Mousa Hussein,&nbsp;Shufeng Sun","doi":"10.1002/andp.70268","DOIUrl":"https://doi.org/10.1002/andp.70268","url":null,"abstract":"<div>\u0000 \u0000 <p>A coordination-based material, Zn-4-aminopyridine, is demonstrated for the first time as a nonlinear optical modulator for passive mode-locking operating at the extended 2 µm wavelength region. The coordination compound was deposited onto an arc-shaped fiber and subsequently incorporated into a ring-cavity laser configuration. Stable soliton pulses were achieved at a center wavelength of approximately 2078.06 nm, with a repetition rate of 15.11 MHz and a pulse duration of 1.70 ps. This work successfully introduces coordination compounds as a viable and versatile class of saturable absorbers for mode-locking in holmium-doped fiber lasers at extended 2 µm operation.</p>\u0000 </div>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"OAM-Based Multiplexed Communication System With a Reflective Metasurface","authors":"Luyao Wang,&nbsp;Xiaojun Huang,&nbsp;Sihan Cui,&nbsp;Yi Zhong,&nbsp;Yujie Liu","doi":"10.1002/andp.70257","DOIUrl":"https://doi.org/10.1002/andp.70257","url":null,"abstract":"<div>\u0000 \u0000 <p>This paper presents a reflective metasurface that enables simultaneous orbital angular momentum (OAM) mode division and polarization-division multiplexing for high-capacity wireless communication systems. Through a symmetric unit design, the metasurface is capable of generating four coaxial OAM beams with two orthogonal polarizations, thereby demonstrating high-purity dual-mode and dual-polarization operation. The performance of the metasurface is verified via simulation and experimental approaches, which demonstrate interference-free OAM multiplexing and excellent mode and polarization isolation within the 5G frequency band.Based on this metasurface, separate dual-mode and dual-polarization wireless communication experiments are demonstrated, verifying the independent transmission capability of the OAM-mode and polarization channels. A projected aggregate raw throughput of 1.6008 Gbit/s can be expected if all four independent channels operate with 66.7-Mbaud 64-QAM signals.</p>\u0000 </div>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148753112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Probing Higher-Order Quantum Correlations in High Energy Physics","authors":"Ao-Xiang Liu,&nbsp;Cong-Feng Qiao","doi":"10.1002/andp.70264","DOIUrl":"https://doi.org/10.1002/andp.70264","url":null,"abstract":"<div>\u0000 \u0000 <p>Nonlocality is a peculiar nature of quanta, and it stands as an important quantum resource in application. Yet its mere linear property of it, viz. the first order in moment, has been explored through various inequalities. Noticing that the vast higher-order regime remains unexplored, in this study we investigate the higher-order quantum correlations in entangled hyperon-antihyperon system, which may be generated massively in charmonium decays. A new type of Clauser-Horne inequality for statistical cumulants and central moments is formulated. We find that a significant violation of the third-order constraint, indicating the existence of higher-order correlation, exists in hyperon-antihyperon system and can be observed in high-energy physics experiments, like BESIII and Belle II. Notably, the violation is more pronounced in higher-energy systems of the <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mi>Λ</mi>\u0000 <mover>\u0000 <mi>Λ</mi>\u0000 <mo>¯</mo>\u0000 </mover>\u0000 </mrow>\u0000 <annotation>$Lambda bar{Lambda }$</annotation>\u0000 </semantics></math> pair against the kinematic contamination of timelike events.</p>\u0000 </div>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Gamma Factory: A New Experimental Paradigm for the Post-HL-LHC Era","authors":"Mieczyslaw Witold Krasny","doi":"10.1002/andp.70262","DOIUrl":"https://doi.org/10.1002/andp.70262","url":null,"abstract":"<p>The Gamma Factory (GF) proposal is motivated by the recognition of a largely untapped potential of the CERN accelerator complex to enable a new research program at the intersection of particle, nuclear, atomic, fundamental, and applied physics. These fields could benefit from novel experimental tools made possible by a future GF facility. The central concept is to produce, accelerate, cool, and store atomic beams of highly relativistic partially stripped ions in the LHC, which would serve as an effective atomic trap. The internal degrees of freedom of these ions are then resonantly excited using laser photons. In the GF scheme, laser-cooled atomic beams serve both as high-precision probes and as low-emittance beam sources for high-luminosity LHC operation in the ion–ion collision mode. Interactions between laser pulses stored in Fabry–Perot cavities and circulating ion beams give rise to high-energy, highly collimated, and polarized secondary photon beams. Their expected intensities exceed those of existing gamma-ray sources by several orders of magnitude. These photon beams can further be used to generate unprecedented-intensity, tertiary beams of polarized electrons, positrons, muons, neutrons, radioactive ions, and flavor- or CP-tagged neutrinos. Furthermore, under a specific configuration, the same photon-driven processes may be exploited in an energy-production scheme generating the requisite plug-power for LHC operation. Together, cold relativistic atomic beams, high-intensity photon beams, and tertiary beams constitute a versatile experimental platform capable of opening a wide range of new scientific opportunities at CERN. By exploiting existing accelerator infrastructure and available state-of-the-art laser technologies, the GF offers a path to a cost-effective and timely program capable of sustaining experimental innovation and bridging the gap between the HL-LHC era and the future high-energy-frontier collider era.</p>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.70262","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Measurement-Device-Independent Quantum Key Distribution With Third-Party Quantum Sources","authors":"Xinting Su,&nbsp;Xiangfu Zou,&nbsp;Xin Wang,&nbsp;Shenggen Zheng,&nbsp;Zhenbang Rong,&nbsp;Zhiming Huang,&nbsp;Minghui Cai,&nbsp;Wenchen Tan","doi":"10.1002/andp.70265","DOIUrl":"https://doi.org/10.1002/andp.70265","url":null,"abstract":"<div>\u0000 \u0000 <p>Traditional quantum key distribution (QKD) protocols secure communications by trusting the source or the measurement device. Among these, measurement-device-independent quantum key distribution (MDI-QKD) protocols remove the need to trust the measurement device by delegating it to an untrusted third party. We categorize the operations of the QKD protocol into three fundamental processes: realizing quantum sources, applying unitary operations, and performing measurements. Furthermore, we have designed an MDI-QKD protocol utilizing third-party quantum sources, which establishes connections with the BB84 protocol, the BBM92 protocol, and the first MDI-QKD protocol. Specifically, the three protocols can be regarded as special cases of the proposed protocol under different equivalent implementations. Under the assumptions of the source's dimension and ideal operation devices, the proposed protocol can guarantee information-theoretic security even if the quantum sources and measurement devices are controlled by an adversary. Moreover, we demonstrate that its security is equivalent to that of the BBM92 protocol, with a tolerable error rate of approximately <span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <mn>11</mn>\u0000 <mo>%</mo>\u0000 </mrow>\u0000 <annotation>$11%$</annotation>\u0000 </semantics></math>. Finally, we give a generalization of the proposed protocol and a corresponding experimental setup framework. This work reveals certain inherent connections between different quantum key distribution protocols, enriching the research results of quantum key distribution.</p>\u0000 </div>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148752490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Thermodynamics and Optical Properties of Charged Black Holes in Bumblebee Gravity Sourced by a Cloud of Strings","authors":"Faizuddin Ahmed,&nbsp;Shubham Kala,&nbsp;Ahmad Al-Badawi","doi":"10.1002/andp.70260","DOIUrl":"https://doi.org/10.1002/andp.70260","url":null,"abstract":"<div>\u0000 \u0000 <p>In theories where the Lorentz symmetry of gravity is spontaneously broken, a non-minimally coupled bumblebee vector field acquires a nonzero vacuum expectation value, leading to modifications of standard General Relativity (GR). In this work, we investigate exact solutions describing static and spherically symmetric charged black holes surrounded by a cloud of strings within the framework of bumblebee gravity. We begin by analyzing the thermodynamic properties of these black hole solutions, including their mass, temperature, and entropy, highlighting how Lorentz-violating effects alter standard results. Next, we examine the optical properties of the spacetime, focusing on the photon sphere, the resulting black hole shadow, and the deflection of light, thereby providing potential observational signatures of Lorentz violation. Finally, we explore the impact of Lorentz-violating parameters on classical gravitational tests within the Solar System, such as advance of perihelion precession, in order to set observational constraints. Our analysis provides a comprehensive investigation of the interplay between Lorentz violation, black hole physics, and cloud of strings, offering a framework to probe new physics beyond GR.</p>\u0000 </div>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148617359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electron Tunneling Transport and Magnetic Field Modulation Through a Superconductor-Kitaev Layer-Superconductor Junction","authors":"Shi-Qing Jia,&nbsp;Ya-Min Quan,&nbsp;Liang-Jian Zou,&nbsp;Hai-Qing Lin","doi":"10.1002/andp.70261","DOIUrl":"https://doi.org/10.1002/andp.70261","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 &lt;p&gt;We present the electron tunneling transport and its magnetic field modulation of a superconducting (SC)&lt;i&gt;Josephson&lt;/i&gt; junction with a barrier of single isotropic ferromagnetic (FM) Kitaev layer. We find that at the magnetic field &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;H&lt;/mi&gt;\u0000 &lt;mi&gt;z&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mo&gt;=&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$H_z =$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; 0, the &lt;i&gt;Josephson&lt;/i&gt; current &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;I&lt;/mi&gt;\u0000 &lt;mi&gt;S&lt;/mi&gt;\u0000 &lt;/msup&gt;\u0000 &lt;annotation&gt;$I^{S}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; displays two peaks when the ratio of Kitaev coupling to SC energy gap &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;K&lt;/mi&gt;\u0000 &lt;mo&gt;/&lt;/mo&gt;\u0000 &lt;mi&gt;Δ&lt;/mi&gt;\u0000 &lt;mo&gt;≈&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$K/Delta approx$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; 1.7 and 5, which stem from the resonant tunnelings between the SC gap boundaries and the spinon dispersive bands and between the SC gap edges and the spinon flat bands, respectively. With the increasing magnetic field, &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;msup&gt;\u0000 &lt;mi&gt;I&lt;/mi&gt;\u0000 &lt;mi&gt;S&lt;/mi&gt;\u0000 &lt;/msup&gt;\u0000 &lt;annotation&gt;$I^{S}$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; gradually decreases and abruptly drops to a platform at the critical magnetic field &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;h&lt;/mi&gt;\u0000 &lt;mi&gt;c&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mo&gt;=&lt;/mo&gt;\u0000 &lt;mi&gt;g&lt;/mi&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;μ&lt;/mi&gt;\u0000 &lt;mi&gt;B&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;msub&gt;\u0000 &lt;mi&gt;H&lt;/mi&gt;\u0000 &lt;mi&gt;c&lt;/mi&gt;\u0000 &lt;/msub&gt;\u0000 &lt;mo&gt;/&lt;/mo&gt;\u0000 &lt;mi&gt;Δ&lt;/mi&gt;\u0000 &lt;mo&gt;≈&lt;/mo&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$h_c = gmu _BH_c/Delta approx$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; 0.03&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;K&lt;/mi&gt;\u0000 &lt;mo&gt;/&lt;/mo&gt;\u0000 &lt;mi&gt;Δ&lt;/mi&gt;\u0000 &lt;/mrow&gt;\u0000 &lt;annotation&gt;$K/Delta$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; (&lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mi&gt;g&lt;/mi&gt;\u0000 &lt;annotation&gt;$g$&lt;/annotation&gt;\u0000 &lt;/semantics&gt;&lt;/math&gt; is the &lt;span&gt;&lt;/span&gt;&lt;math&gt;\u0000 &lt;semantics&gt;\u0000 &lt;mrow&gt;\u0000 &lt;mi&gt;L&lt;/mi&gt;\u0000 &lt;mi&gt;a&lt;/mi&gt;\u0000 &lt;mi&gt;n&lt;/mi&gt;\u0000 &lt;mi&gt;d","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148617215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Precision Quantum Sensing With a Multi-Atomic Quantum Sensor: Applications in Quantum Thermometry and Magnetometry","authors":"Seyed Mohammad Hosseiny,&nbsp;Milad Norouzi","doi":"10.1002/andp.70255","DOIUrl":"https://doi.org/10.1002/andp.70255","url":null,"abstract":"<div>\u0000 \u0000 <p>Quantum sensors are devices that utilize quantum systems' properties to achieve high-precision measurements of physical quantities, such as magnetic fields and temperature. The metrological precision of quantum sensors refers to their ability to provide accurate and reliable measurements with minimal uncertainty. In this paper, we propose a quantum sensor consisting of multiple atoms arranged in a spin chain, exposed to a thermal bath at a temperature and an external weak magnetic field with a magnetic-field gradient for quantum thermometry and magnetometry. Employing the Hilbert-Schmidt speed (HSS), a popular measure of quantum statistical speed to quantify precision limits in parameter estimation theory, we have investigated in detail how the magnetic-field gradient and spin chain position influence the quantum sensor's metrological capabilities. We show that the performance and precision of our quantum sensor depend on the spin chain position and the magnetic field and its gradient; increasing these factors' values reduces estimation precision and weakens quantum sensor performance. Finally, increasing the number of atoms in a quantum sensing structure improves the accuracy of temperature and field estimation.</p>\u0000 </div>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148616416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Issue Information: Ann. Phys. 8/2026","authors":"","doi":"10.1002/andp.70266","DOIUrl":"https://doi.org/10.1002/andp.70266","url":null,"abstract":"","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 8","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/andp.70266","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148616417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Dynamical Origin of Single-Slit Diffraction From Single-Photon Momentum Recoil and Velocity-Perpendicular Particle-Wave Interaction","authors":"Chao-Fei Liu","doi":"10.1002/andp.70263","DOIUrl":"https://doi.org/10.1002/andp.70263","url":null,"abstract":"<div>\u0000 \u0000 <p>In this study, we propose a formula to characterize the mechanical properties of microscopic particles from the particle-wave interaction perspective, defining the corresponding interaction as a velocity-perpendicular interaction force. Traditional single-slit diffraction is mainly explained by wave theory and the Huygens–Fresnel principle. However, the single-photon momentum recoil in diffraction suggests that it is feasible to decouple the particle and wave natures of both photons and the slit, thereby exploring the interaction force between them in depth. We find that photons at different positions inside the slit experience velocity-perpendicular interaction force, leading to net interaction time differences related to their distances to the slit edges. Based on wave-particle duality, the modulation quantity formed by the interaction force, net interaction time, slit scale, and Planck constant exerts an on-off modulation effect. Within this model, photons form clear diffraction fringes, which are rigorously verified to be fully consistent with the Huygens–Fresnel principle. This work provides a dynamical reinterpretation of single-slit diffraction and establishes a mechanical framework for quantitatively describing quantum phenomena involving particle-wave interaction.</p>\u0000 </div>","PeriodicalId":7896,"journal":{"name":"Annalen der Physik","volume":"538 7","pages":""},"PeriodicalIF":2.3,"publicationDate":"2026-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148615943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}