Physics Open最新文献_第5页

Spatial-temporal dynamics of stimulated Raman scattering: Effects of populations and two-photon detuning 受激拉曼散射的时空动态：种群和双光子失谐的影响

Physics Open Pub Date : 2024-04-02 DOI: 10.1016/j.physo.2024.100211

C.H. Raymond Ooi, Yuzhao Huang, Jong Wey Lee

引用次数: 0

Physical studies of chitosan/PEG loaded Fe2O3 nanoparticles microbeads as a based biodegradable material for radiation shielding 壳聚糖/PEG负载的Fe2O3纳米颗粒微珠作为生物可降解辐射屏蔽材料的物理研究

Physics Open Pub Date : 2024-03-27 DOI: 10.1016/j.physo.2024.100209

M. Elotaiby, Asmaa M. Elzayat, W.M. Awad, M. Abdelaziz, E.M. Abdelrazek

{"title":"Physical studies of chitosan/PEG loaded Fe2O3 nanoparticles microbeads as a based biodegradable material for radiation shielding","authors":"M. Elotaiby, Asmaa M. Elzayat, W.M. Awad, M. Abdelaziz, E.M. Abdelrazek","doi":"10.1016/j.physo.2024.100209","DOIUrl":"https://doi.org/10.1016/j.physo.2024.100209","url":null,"abstract":"<div><p>This work reports two different strategies for the formation of hybrid microbeads using chitosan and polyethylene glycol (PEG) as based biodegradable materials for radiation shielding. An organic–inorganic hydrogel was prepared by ionotropic gelation. During the in-situ loading, incorporating magnetic nanoparticles Fe<sub>2</sub>O<sub>3</sub> into the polymer matrix, magnetic nanostructures, were entrapped in the polymer matrix during the physical cross-linking of the polymer with the physical cross-linker (sodium triphosphate). However, in case of post-loading mechanism the loaded nanoparticles favor the precipitation on the surface of the formed beads. We use different characterization techniques for our systems such as scanning electron microscopy (SEM), x-ray, infrared spectroscopy (XRD), and X-ray radiation shielding application. The results demonstrate that by incorporating nanostructured magnetic particles into the polymer matrix, the surface morphology based on the two processes allow the magnetic nanoparticles to be embedded or form an outer shell and precipitated on the surface of polymer microbeads. The values of μ for the hydrogels loaded with Fe<sub>2</sub>O<sub>3</sub> by in-situ process have the larger values of the linear coefficient however, in case of post-loading process the values dramatically decrease in compare with the in-situ ones at the same tube voltage. The presented work recommended as a good mentor for radiation shielding.</p></div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"19 ","pages":"Article 100209"},"PeriodicalIF":0.0,"publicationDate":"2024-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666032624000073/pdfft?md5=e3ee2fd975af74dbd758415f252640e1&pid=1-s2.0-S2666032624000073-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140320530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Scalable surface ion trap design for magnetic quantum sensing and gradiometry 用于磁量子传感和梯度测量的可扩展表面离子阱设计

Physics Open Pub Date : 2024-02-22 DOI: 10.1016/j.physo.2024.100208

Qirat Iqbal, Altaf Hussain Nizamani

{"title":"Scalable surface ion trap design for magnetic quantum sensing and gradiometry","authors":"Qirat Iqbal, Altaf Hussain Nizamani","doi":"10.1016/j.physo.2024.100208","DOIUrl":"https://doi.org/10.1016/j.physo.2024.100208","url":null,"abstract":"<div><p>Magnetic quantum sensors based on trapped ions utilize properties of quantum mechanics which have optimized precision and beat current limits in sensor technology. Trapped ions are highly sensitive in a large span of signal ranging from DC or static B-field to the radiofrequency range in 100s of MHz and can attain the sensitivity in the range of <span><math><mrow><mtext>pT</mtext><mo>/</mo><msqrt><mtext>Hz</mtext></msqrt></mrow></math></span> to sub-<span><math><mrow><mtext>pT</mtext><mo>/</mo><msqrt><mtext>Hz</mtext></msqrt></mrow></math></span>. They are tuneable to frequencies of interest and can be used as a lock-in frequency detector. This modelling and simulation based study presents an innovative design of Surface Paul Traps, enabling the use of trapped ions as ultra-sensitive sensors for magnetic field detection and precise measurement of magnetic field gradients at a sub-millimeter spatial resolution. The novel design features multiple trapping regions, allowing for the mapping of magnetic fields across various ion-trapping zones. The study demonstrates groundbreaking advancements in ion manipulation and confinement through innovative chip architecture.</p></div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"19 ","pages":"Article 100208"},"PeriodicalIF":0.0,"publicationDate":"2024-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666032624000061/pdfft?md5=68bb7da35d20599495d3d99f38ac4547&pid=1-s2.0-S2666032624000061-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139986765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison between variations in solar UV radiation and sunspot parameters with Mg II daily index as a proxy 太阳紫外线辐射变化与以 Mg II 日指数为代表的太阳黑子参数之间的比较

Physics Open Pub Date : 2024-02-15 DOI: 10.1016/j.physo.2024.100204

(G) Chandrika , Belur Ravindra , Vijay Kumar Doddamani

{"title":"Comparison between variations in solar UV radiation and sunspot parameters with Mg II daily index as a proxy","authors":"(G) Chandrika , Belur Ravindra , Vijay Kumar Doddamani","doi":"10.1016/j.physo.2024.100204","DOIUrl":"10.1016/j.physo.2024.100204","url":null,"abstract":"<div><p>Solar UV radiation influence the Earth's climate and upper atmosphere. The UV emission from the Sun modulates with the sunspot cycle with an 11-year periodicity. The variations in UV, EUV, and X-rays emission are significant during the solar cycle evolution compared to the visible part of the spectrum. The h & k lines of the Mg II spectra emitted from the chromosphere represent the solar UV variability. The sunspot's magnetic fields and dynamics are responsible for the UV and EUV emissions from the solar chromosphere and corona. This paper compares the Mg II core-to-wing ratio of the h & k lines observed at 278 nm wavelength (obtained from Solar Backscattered Ultraviolet Spectrograph (SBUV) instrument onboard the NOAA satellite) with the sunspot area parameter obtained from Royal Greenwich Observatory. When the sunspot group area is small, there is a linear relationship between the sunspot group area and the Mg II index. But a non-linear relationship between the two is observed for the large sunspot group area. There is no phase delay between the appearance of sunspot groups on the solar photosphere and the emission from the Mg II doublet. Apart from 11-year periodicity, we observed common 4.7, 3.2, and 2.2-year periodicity in both the data sets, suggesting the Mg II index is related to the sunspot parameters.</p></div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"19 ","pages":"Article 100204"},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666032624000024/pdfft?md5=3bb479717c16f0632c4bc79d76bd67c6&pid=1-s2.0-S2666032624000024-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139885103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to “G. Perosa, S. Di Mitri, W. A. Barletta and F. Parmigiani Doppler. Signature in electrodynamic retarded potentials” [Phys. Open, 14 (2023) 100136] 对 "G. Perosa、S. Di Mitri、W. A. Barletta 和 F. Parmigiani 多普勒。电动迟滞势中的特征" [Phys. Open, 14 (2023) 100136]

Physics Open Pub Date : 2024-02-01 DOI: 10.1016/j.physo.2024.100203

引用次数: 0

Space-temporal structure of the thunderstorm ground enhancements (TGEs) 雷暴地面增强（TGEs）的时空结构

Physics Open Pub Date : 2023-12-19 DOI: 10.1016/j.physo.2023.100202

A. Chilingarian, D. Pokhsraryan, F. Zagumennov, M. Zazyan

引用次数: 0

Study of trends in cross-section values of primary reactions of most abundant isotope of elements with Z= 6 to 116 induced by 14 MeV neutrons using TALYS code and the EXFOR database 利用 TALYS 代码和 EXFOR 数据库研究 Z= 6 至 116 的最丰富元素同位素在 14 MeV 中子诱导下发生的一次反应的截面值趋势

Physics Open Pub Date : 2023-12-18 DOI: 10.1016/j.physo.2023.100201

Ranjita Mandal , Pronoy Biswas , Debashish Sengupta

{"title":"Study of trends in cross-section values of primary reactions of most abundant isotope of elements with Z= 6 to 116 induced by 14 MeV neutrons using TALYS code and the EXFOR database","authors":"Ranjita Mandal , Pronoy Biswas , Debashish Sengupta","doi":"10.1016/j.physo.2023.100201","DOIUrl":"10.1016/j.physo.2023.100201","url":null,"abstract":"<div><p>Study was carried out to understand the trends of variation of cross-section values of all possible primary reactions induced by 14 MeV neutrons incident on the most abundant isotope of elements from atomic number 6 to 116. The available nuclear reaction channels and cross-section values of all possible primary reactions were obtained using the theoretical values calculated using TALYS nuclear code version 1.96. The trends were explained on the basis of nuclear binding energy curve, the pairing effect and shell effect. Most of the trends show a regular variation except at some points, which give interesting information for the nucleus where trend is irregular. The variation of the available experimental cross-section values obtained from the EXFOR database, if any, was also obtained and compared with the trends obtained from the theoretical values. The discrepancies in the trends of theoretical and experimental cross-section values of various possible reactions were explained on the basis of the possible errors in experiments and the assumptions of the theoretical model of the TALYS nuclear code.</p></div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"18 ","pages":"Article 100201"},"PeriodicalIF":0.0,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666032623000662/pdfft?md5=3acd18df476ad294acf9d263350454f2&pid=1-s2.0-S2666032623000662-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139017945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantum sub-phase sensitivity of a Mach–Zehnder interferometer with the superposition of Schrödinger’s cat-like state with vacuum state as an input under product detection scheme 以薛定谔猫态与真空态的叠加为输入，在积探测方案下马赫-泽恩德干涉仪的量子次相位灵敏度

Physics Open Pub Date : 2023-12-10 DOI: 10.1016/j.physo.2023.100200

Gaurav Shukla , Dhiraj Yadav , Priyanka Sharma, Anand Kumar, Devendra Kumar Mishra

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Quantum sensitivity of squeezed Schrodinger cat states 挤压薛定谔猫态的量子敏感性

Physics Open Pub Date : 2023-12-08 DOI: 10.1016/j.physo.2023.100198

Ranjit Singh , Alexander E. Teretenkov

引用次数: 0

Transformation of Bell states using linear optics 利用线性光学转换贝尔态

Physics Open Pub Date : 2023-12-08 DOI: 10.1016/j.physo.2023.100199

Sarika Mishra , R.P. Singh

{"title":"Transformation of Bell states using linear optics","authors":"Sarika Mishra , R.P. Singh","doi":"10.1016/j.physo.2023.100199","DOIUrl":"https://doi.org/10.1016/j.physo.2023.100199","url":null,"abstract":"<div><p>Bell states form a complete set of four maximally polarization entangled two-qubit quantum state. Being a key ingredient of many quantum applications such as entanglement based quantum key distribution protocols, superdense coding, quantum teleportation, entanglement swapping etc, Bell states have to be prepared and measured. Spontaneous parametric down-conversion (SPDC) is the easiest way of preparing Bell states and a desired Bell state can be prepared from any entangled photon pair through single-qubit logic gates. In this paper, we present the generation of complete set of Bell states, only by applying unitary transformations of half-wave plate (HWP) on the initial Bell state. The initial Bell state is prepared using a combination of a nonlinear crystal and a beam-splitter (BS) and the rest of the Bell states are created by applying single-qubit logic gates on the entangled photon pairs using HWPs. Our results can be useful in many quantum applications, especially in superdense coding where control over basis of maximally entangled state is required.</p></div>","PeriodicalId":36067,"journal":{"name":"Physics Open","volume":"18 ","pages":"Article 100199"},"PeriodicalIF":0.0,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666032623000649/pdfft?md5=91a207fe6e0fe54102c64909edca900f&pid=1-s2.0-S2666032623000649-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138550191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0