The European Physical Journal D最新文献

Scars of Kramers–Henneberger atoms 克拉默-亨内伯格原子的伤疤

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-16 DOI: 10.1140/epjd/s10053-024-00942-3

E. Floriani, J. Dubois, C. Chandre

引用次数: 0

Small amplitude ion-acoustic waves in electron-ion dusty plasma: Landau damping effects of combined Kappa–Cairns distributed electrons 电子-离子尘埃等离子体中的小振幅离子声波：卡帕-凯恩斯组合分布电子的朗道阻尼效应

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-16 DOI: 10.1140/epjd/s10053-024-00941-4

Rittika Pain, Sandip Dalui, Sankirtan Sardar, Anup Bandyopadhyay

引用次数: 0

Nonlinear optical properties of colloidal solutions of Ag2Se quantum dots passivated with 2-Mercaptopropionic acid in the field of 10 ns YAG:Nd3+ laser pulses

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-12 DOI: 10.1140/epjd/s10053-024-00940-5

O. V. Ovchinnikov, A. I. Zvyagin, M. S. Smirnov, I. G. Grevtseva, S. V. Aslanov, A. Hussein

{"title":"Nonlinear optical properties of colloidal solutions of Ag2Se quantum dots passivated with 2-Mercaptopropionic acid in the field of 10 ns YAG:Nd3+ laser pulses","authors":"O. V. Ovchinnikov, A. I. Zvyagin, M. S. Smirnov, I. G. Grevtseva, S. V. Aslanov, A. Hussein","doi":"10.1140/epjd/s10053-024-00940-5","DOIUrl":"10.1140/epjd/s10053-024-00940-5","url":null,"abstract":"<div><p>The results of a study of the nonlinear optical properties of Ag<sub>2</sub>Se colloidal quantum dots (QDs) passivated with 2-mercaptopropionic acid (hereinafter Ag<sub>2</sub>Se/2-MPA) with an average size of 2.0–2.5 nm in the field of 10 ns YAG:Nd<sup>3+</sup> laser pulses are presented. Using the Z-scan method in an open aperture design, it was found that the nonlinear absorption in Ag<sub>2</sub>Se/2-MPA colloidal QDs is due to reverse saturation absorption (RSA). In addition, Z-scanning in a closed-aperture scheme demonstrated nonlinear refraction, which manifested itself in the form of defocusing of the probing radiation. Dependences of the level of nonlinear absorption and refraction of laser pulses on the concentration of the Se precursor were discovered, which affects the crystallization conditions and the degree of nonstoichiometry of the formed nanocrystals, as well as the concentration of dangling bonds. The obtained patterns indicate the participation of localized states in the RSA process, and changes in the population of localized states determine the observed defocusing effect.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 12","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810884","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}

引用次数: 0

Improved photon blockade in the two-photon Jaynes–Cummings model by additional quantum interference

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-11 DOI: 10.1140/epjd/s10053-024-00936-1

Xin Liu, XiaoNing Cui, MengYu Tian, Chao Sun, YuFan Zhu

引用次数: 0

Reconfigurable metasurface design with hallucination and stealth capabilities

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-07 DOI: 10.1140/epjd/s10053-024-00938-z

Yanling Li, Fuhai Liu, Mingfeng Zheng, Ying Tang, Junling Han

引用次数: 0

Injection, confinement, and diagnosis of electrons and positrons in a permanent magnet dipole trap

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-05 DOI: 10.1140/epjd/s10053-024-00821-x

J. von der Linden, S. Nißl, A. Deller, M. Singer, N. Belmore, C. P. Hugenschmidt, T. Sunn Pedersen, H. Saitoh, E. V. Stenson

{"title":"Injection, confinement, and diagnosis of electrons and positrons in a permanent magnet dipole trap","authors":"J. von der Linden, S. Nißl, A. Deller, M. Singer, N. Belmore, C. P. Hugenschmidt, T. Sunn Pedersen, H. Saitoh, E. V. Stenson","doi":"10.1140/epjd/s10053-024-00821-x","DOIUrl":"10.1140/epjd/s10053-024-00821-x","url":null,"abstract":"<p>Prerequisites for the goal of studying long-lived, magnetically confined, electron–positron pair plasmas in the laboratory include the injection of both species into the trap, long trapping times, and suitable diagnostic methods. Here we report recent progress on these tasks achieved in a simple dipole trap based on a supported permanent magnet. For the injection of electrons, both an <span>(textbf{E}times B)</span> drift technique (of a <span>(sim )</span>2–<span>(upmu )</span>A, 6-eV beam) and “edge injection” (from a filament emitting a few mA and biased to some tens of volts) have been demonstrated; the former is suitable for low-density beams with smaller spatial and velocity spreads, while the latter employs fluctuations arising from collective behavior. To diagnose the edge-injected electrons, image potentials and currents induced on a wall probe, the magnet case, and wall electrodes were measured. Confinement of drift-injected positrons, measured experimentally, exhibited at least two well-separated timescales. Simulations reproduced this qualitatively, using a simple model of elastic collisions with residual background gas, and point to small adjustments for increasing trapping times. In a major upgrade to diagnostic capabilities, 25 bismuth germanate detectors, placed in three reentrant ports, are able to localize annihilation gammas, which will be used in future experiments to distinguish between different loss channels.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 12","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjd/s10053-024-00821-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778407","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}

引用次数: 0

Combination of the TD-DFT and the pixel counting method for determining electron capture cross sections for protons impacting on organic molecules

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-05 DOI: 10.1140/epjd/s10053-024-00939-y

Luca A. de Oliveira, Jhaison C. de Farias, Mario A. Bernal

{"title":"Combination of the TD-DFT and the pixel counting method for determining electron capture cross sections for protons impacting on organic molecules","authors":"Luca A. de Oliveira, Jhaison C. de Farias, Mario A. Bernal","doi":"10.1140/epjd/s10053-024-00939-y","DOIUrl":"10.1140/epjd/s10053-024-00939-y","url":null,"abstract":"<p>The electron capture by heavy charged particles is of interest in a wide range of physical applications. In radiation biophysics, electron capture cross sections (ECCS) is a key information for the implementation of Monte Carlo simulation codes. In this work, the time-dependent density functional theory (TD-DFT) has been used for the determination of ECCS for protons impacting on atoms with presence in organic compounds, in the 1–200 keV energy range. Later, these atomic cross sections were combined through the pixel counting method for determining corresponding cross section of small and large organic molecules and water, which is of primordial importance in radiation biophysics. The large organic molecules include DNA bases and a whole DNA base pair. Excellent results were obtained for the small molecules along the whole energy range. For DNA components, good results were found at high energies (100–200 keV). At lower energies, larger discrepancies were obtained when compared with other theoretical and experimental work. The possible causes for these discrepancies are deeply discussed. This work should support later works for developing a charge equalization method for classical molecular dynamics to describe fast proton collisions with organic materials.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 12","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778122","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}

引用次数: 0

Highly efficient nonreciprocity and nonreciprocal photonic devices in a semiconductor quantum well

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-04 DOI: 10.1140/epjd/s10053-024-00937-0

Yunran Ge, Kang Zheng, Boxiang Fang, Chunling Ding, Xiangying Hao, Rui-Bo Jin

{"title":"Highly efficient nonreciprocity and nonreciprocal photonic devices in a semiconductor quantum well","authors":"Yunran Ge, Kang Zheng, Boxiang Fang, Chunling Ding, Xiangying Hao, Rui-Bo Jin","doi":"10.1140/epjd/s10053-024-00937-0","DOIUrl":"10.1140/epjd/s10053-024-00937-0","url":null,"abstract":"<p>We propose theoretically a non-magnetic optical nonreciprocity (ONR) scheme with high efficiency by employing the four-wave mixing (FWM) effect in an asymmetric semiconductor three-coupled-quantum-well (TCQW) nanostructure. Nonreciprocal transmission and nonreciprocal phase shift in this TCQW, both with high transmission rates, can be achieved using suitable parameters. Considering an orbital-angular-momentum (OAM) probe beam, the perfect nonreciprocity can be obtained based on the highly efficient FWM. Furthermore, the integration of this TCQW nanostructure into a Mach–Zehnder interferometer enables the fabrication of highly efficient optical isolators and optical circulators by selecting appropriate parameters. The optical isolator exhibits an isolation ratio of 97.76 dB and an insertion loss of 0.25 dB, while the optical circulator demonstrates a fidelity of 0.9993 and a photon survival probability of 0.9517. Our approach based on semiconductor media has the advantages of easy fabrication and good integration with adjustable parameters. In conjunction with the distinctive characteristics of the OAM beam, our protocol offers a theoretical framework for the development of highly integrated and multi-dimensional nonreciprocity and nonreciprocal photonic devices.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 12","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778186","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}

引用次数: 0

Modified six-state cryptographic protocol with entangled ancilla states

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-12-04 DOI: 10.1140/epjd/s10053-024-00934-3

Rashi Jain, Satyabrata Adhikari

{"title":"Modified six-state cryptographic protocol with entangled ancilla states","authors":"Rashi Jain, Satyabrata Adhikari","doi":"10.1140/epjd/s10053-024-00934-3","DOIUrl":"10.1140/epjd/s10053-024-00934-3","url":null,"abstract":"<p>In a realistic situation, it is very difficult to communicate securely between two distant parties without introducing any disturbances. These disturbances might occur either due to external noise or may be due to the interference of an eavesdropper. In this work, we consider and modify the six-state Quantum Key Distribution (QKD) protocol in which Eve can construct the unitary transformation that make all ancilla states entangled at the output, which is not considered in Bruss’s work [29]. Using the above proposed modification, we would like to study the effect of entangled ancilla states on the mutual information between Alice and Eve. To achieve this task, we calculate the mutual information between Alice and Bob and Alice and Eve and identify the region where the secret key is generated even in the presence of Eve. We find that, in general, the mutual information of Alice and Eve depends not only on the disturbance D but also on the concurrence of the ancilla states. We show that the entanglement of the ancilla states helps in generating the secret key in the region where Bruss’s six-state QKD protocol failed to do so. We have further shown that it is possible to derive the disturbance-free mutual information of Alice and Eve, if Eve manipulates her entangled ancilla state in a particular manner. Thus, in this way, we can show that a secret key can be generated between Alice and Bob even if the disturbance is large enough.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 12","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778185","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}

引用次数: 0

Ionic fragmentation by electron impact of isobutanol: mass spectrum, appearance energies and Wannier exponents 异丁醇的电子撞击离子破碎：质谱、显现能和万尼尔指数

IF 1.5 4区物理与天体物理

The European Physical Journal D Pub Date : 2024-11-28 DOI: 10.1140/epjd/s10053-024-00933-4

O. L. Oliveira Junior, M. C. A. Lopes, R. A. A. Amorim

{"title":"Ionic fragmentation by electron impact of isobutanol: mass spectrum, appearance energies and Wannier exponents","authors":"O. L. Oliveira Junior, M. C. A. Lopes, R. A. A. Amorim","doi":"10.1140/epjd/s10053-024-00933-4","DOIUrl":"10.1140/epjd/s10053-024-00933-4","url":null,"abstract":"<div><p>The mass spectrum (MS) and appearance energies (AEs) of the cationic fragments formed in electron collisions with isobutanol were investigated in this work using a HIDEN EPIC 300 mass spectrometer. We highlight here the discovery of 6 new cationic fragments in the literature for MS as well as 10 AEs and ps values reported for the first time. The MS was acquired for electron impact energy of 70 eV, in the mass region of 1–80 amu and with a resolution of 1 amu. Here we observed the formation of 45 cationic fragments, thus complementing some data previously reported in the literature, 6 of which were unpublished. The relative abundances of the peaks recorded in the MS show good agreement within the experimental error range, with the available values reported in the literature, where such comparison is carried out. The AEs were determined from the acquisition of isobutanol ionic fragmentation curves, for the electron impact energies covering the cationic fragment formation threshold region. The extended Wannier law was applied to obtain the AEs and Wannier exponents (<i>p</i>) of the fragments recorded in the MS, with relative intensity typically greater than 4% of the most intense fragment. This resulted in MS of isobutanol and data for 15 fragments, of which 10 of these fragments are reported for the first time in this work.</p><h3>Graphic abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 11","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737343","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}

引用次数: 0