检索结果-南通市图书馆

Orbital angular momentum based intra- and interparticle entangled states generated via a quantum dot source

先进光子学(英文) 2023年第4期5卷 74-84页

作者： Alessia Suprano Danilo Zia Mathias Pont Taira Giordani Giovanni Rodari Mauro Valeri Bruno Piccirillo Gonzalo Carvacho Nicolo Spagnolo Pascale Senellart Lorenzo Marrucci Fabio Sciarrino sapienza Universitàdi roma Dipartimento di FisicaRomaItaly Universite Paris-Saclay UMR 9001Centre for Nanosciences and NanotechnologyCNRSPalaiseauFrance Universitàdi Napoli Federico II Complesso Universitario di Monte Sant’AngeloDipartimento di Fisica“Ettore Pancini”NapoliItaly infn-sezione di Napoli NapoliItaly

Engineering single-photon states endowed with orbital angular momentum (OAM) is a powerful toolfor quantum information photonic implementations. Indeed, due to its unbounded nature, OAM is suitable forencoding qudits, allowing a single carrier to transport a large amount of information. Most of the experimentalplatforms employ spontaneous parametric down-conversion processes to generate single photons, evenif this approach is intrinsically probabilistic, leading to scalability issues for an increasing number of qudits.Semiconductor quantum dots (QDs) have been used to get over these limitations by producing on-demand pure and indistinguishable single-photon states, although only recently they have been exploitedto create OAM modes. Our work employs a bright QD single-photon source to generate a complete set ofquantum states for information processing with OAM-endowed photons. We first study hybrid intraparticleentanglement between OAM and polarization degrees of freedom of a single photon whose preparationwas certified by means of Hong–Ou–Mandel visibility. Then, we investigate hybrid interparticle OAM-based entanglement by exploiting a probabilistic entangling gate. The performance of our approach isassessed by performing quantum state tomography and violating Bell inequalities. Our results pave theway for the use of deterministic sources for the on-demand generation of photonic high-dimensionalquantum states.

关键词： orbital angular momentum quantum dot intraparticle entanglement interparticle entanglement Bell violation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Nuclear liquid-gas phase transition within a Brueckner-Hartree-Fock approach

引用

Chinese Physics C 2022年第11期46卷 231-237页

作者：张晶刘宏铭李增花 G.F.Burgio H.-J.Schulze Institute of Modern Physics Key Laboratory of Nuclear Physics and Ion-beam Application(MOE)Fudan UniversityShanghai 200433China infn sezione di Catania Dipartimento di Fisica e AstronomiaUniversitàdi CataniaVia S.Sofia 64I-95123 CataniaItaly

The critical parameters of the liquid-gas phase transition of symmetric nuclear matter are computed using the Brueckner-Hartree-Fock method at finite temperature by employing different realistic nucleon-nucleon potentials.Temperature effects on single-particle potentials,defect functions,and three-body forces are discussed in detail.Results obtained from the full procedure and frozen-correlations approximation are compared.We find critical temperatures of approximately 14 to 19 MeV and critical densities in the range of 0.05 to 0.08fm^(-3),depending on the interactions employed.

关键词： nuclear liquid-gas phase transition Brueckner-Hartree-Fock approach symmetric nuclear matter

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

H→γγ:a comment on the indeterminacy of non-gauge-invariant integrals

引用

Chinese Physics C 2013年第4期37卷 7-13页

作者： F.Piccinini A.Pilloni A.D.Polosa infn Pavia-Via A.Bassi 6 I-27100PaviaItaly dipartimento di Fisica and infn 'Sapienza' Università di Roma-P.le A.Moro 2I-00185RomaItaly

We reanalyze the recent computation of the amplitude of the Higgs boson decay into two photons presented by Gastmans et al. [1, 2]. The reasons for why this result cannot be the correct one have been discussed in some recent papers. We address here the general issue of the indeterminacy of integrals with four-dimensional gauge-breaking regulators and to which extent it might eventually be solved by imposing physical constraints. Imposing gauge invariance as the last step upon Rξ-gauge calculations with four-dimensional gauge-breaking regulators, allows us to recover the well known H→γγ result. However we show that in the particular case of the unitary gauge, the indeterminacy cannot be tackled in the same way. The combination of the unitary gauge with a cutoff regularization scheme turns out to be non-predictive.

关键词： Higgs decay regularization methods loop calculations gauge invariance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The HEPD particle detector of the CSES satellite mission for investigating seismo-associated perturbations of the Van Allen belts

引用

Science China(Technological Sciences) 2018年第5期61卷 643-652页

作者： AMBROSI Giovanni BARTOCCI Simona BASARA laurent BATTISTON Roberto BURGER William J. CARFORA Luca CASTELLINI Guido CIPOLLONE Piero CONTI Livio CONTIN Andrea DE DONATO Cinzia DE SANTIS Cristian FOLLEGA Francesco M. GUANDALINI Cristina IONICA Maria IUPPA Roberto laURENTI Giuliano laZZIZZERA Ignazio LOLLI Mauro MANEA Christian MARCELLI laura MASCIANTONIO Giuseppe MERGE Matteo OSTERIA Giuseppe PACINI Lorenzo PALMA Francesco PALMONARI Federico PANICO Beatrice PATRIZII laura PERFETTO Francesco PICOZZA Piergiorgio POZZATO Michele PUEL Matteo RASHEVSKAYA Irina RICCI Ester RICCI Marco RICCIARINI Sergio Bruno SCOTTI Valentina SOTGIU Alessando SPARVOLI Roberta SPATARO Bruno VITALE Vincenzo Istituto Nazionale di Fisica Nucleare (infn) Sezione di Perugia Perugia 06123 Italy Uninettuno University Rome 00186 Italy Istituto Nazionale di Fisica Nucleare (infn) Sezione di Roma Tor Vergata Rome 00133 Italy Istituto Nazionale di Fisica Nucleare (infn) TIFPA Povo (TN) 38123 Italy dipartimento di Fisica Universita di Trento Povo (TN) 38123 Italy dipartimento di Fisica Universita di Roma Tor Vergata Rome 00133 Italy IFAC-CNR Sesto Fiorentino (FI) 50019 Italy dipartimento di Fisica e Astronomia Universita di Bologna Bologna 40127 Italy Istituto Nazionale di Fisica Nucleare (infn) Sezione di Bologna Bologna 40127 Italy Istituto Nazionale di Fisica Nucleare (infn) Sezione di Napoli Naples 80126 Italy Istituto Nazionale di Fisica Nucleare (infn) LNE Frascati (RM) 00044 Italy Agenzia Spaziale Italiana (ASI) SSDC Rome 00133 Italy

CSES(China Seismo-Electromagnetic Satellite) is a mission developed by CNSA(Chinese National Space Administration) and ASI(Italian Space Agency), to investigate the near-Earth electromagnetic, plasma and particle environment, for studying the seismo-associated disturbances in the ionosphere-magnetosphere transition zone. The anthropogenic and electromagnetic noise,as well as the natural non-seismic electromagnetic emissions is mainly due to tropospheric activity. In particular, the mission aims to confirming the existence of possible temporal correlations between the occurrence of earthquakes for medium and strong magnitude and the observation in space of electromagnetic perturbations, plasma variations and precipitation of bursts with highenergy charged particles from the inner Van Allen belt. In this framework, the high energy particle detector(HEPD) of the CSES mission has been developed by the Italian LIMADOU Collaboration. HEPD is an advanced detector based on a tower of scintillators and a silicon tracker that provides good energy and angular resolution and a wide angular acceptance, for electrons of 3–100 Me V, protons of 30–200 Me V and light nuclei up to the oxygen. CSES satellite has been launched on February 2^(nd), 2018 from the Jiuquan Satellite launch Center(China).

关键词：卫星发射中心粒子带子空间管理合作开发空间机构轻原子核意大利

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

中子的内部结构:来自BESIII的研究

引用

Science Bulletin 2022年第6期67卷 557-560页

作者： Simone Pacetti Rinaldo Baldini Ferroli Andrea Bianconi Egle Tomasi-Gustafsson dipartimento di Fisica e Geologia and INFN Sezione di Perugia1-06123 PerugiaItaly laboratori Nazionali di Frascati dell'infn 1-00044 FrascatiItaly dipartimento di Ingegneria dell'Informazione Brescia1-25133 BresciaItaly INFN Sezione di Pavia1-27100 PaviaItaly DPhN IRFUCEAUniversitéParis-Saclay1-91191 Gif-sur-Yvette CedexFrance

The BESⅢCollaboration has recently published a new precise measurement of the time-like neutron form factor(FF)[1].In the light of the remarkable accuracy and of the wideness of the explored kinematical range,these data represent an unprecedented tool for highlighting and studying specific features of the neutron FF.Until a few years ago,the only available data were those obtained by the FENICE experiment at Frascati,in the’90s[2].

关键词： BESⅢ precise

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

^3PF2 neutron superfluidity in neutron stars and three-body force effect

引用

Chinese Physics B 2008年第9期17卷 3289-3293页

作者：崔常喜左维 H.J.Schulze Institute of Modern Physics Chinese Academy of Sciences infn sezione di Catania

We investigate the ^3PF2 neutron superfluidity in H-stable neutron star matter and neutron stars by using the BCS theory and the Brueckner-Hartree-Fock approach. We adopt the Argonne V18 potential supplemented with a microscopic three-body force as the realistic nucleon-nucleon interaction. We have concentrated on studying the threebody force effect on the ^3PF2 neutron pairing gap. It is found that the three-body force effect is to enhance remarkably the ^3PF2 neutron superfluidity in neutron star matter and neutron stars.

关键词： ^3PF2 superfluidity neutron star three-body force Brueckner-Hartree-Fock approach

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Alpha Magnetic Spectrometer (AMS02) experiment on the International Space Station (ISS)

引用

Nuclear Science and Techniques 2003年第3期14卷 182-194页

作者： Behcet ALPAT infn sezione di Perugia Via A.Pascoli06123PerugiaItaly

The Alpha Magnetic Spectrometer experiment is realized in two phases. A precursor flight (STS-91)with a reduced experimental configuration (AMS01) has successfully flown on space shuttle discovery in June 1998.The final version (AMS02) will be installed on the International Space Station (ISS) as an independent module inearly 2006 for an operational period of three years. The main scientific objectives of AMS02 include the searches forthe antimatter and dark matter in cosmic rays. In this work we will discuss the experimental details as well as the im-proved physics capabilities of AMS02 on ISS.

关键词： α磁分光仪国际空间站反物质暗物质

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Competition between fusion-evaporation and multifragmentation in central collisions in ^(58)Ni+^(48)Ca at 25A MeV

引用

Nuclear Science and Techniques 2013年第5期24卷 82-88页

作者： FRANCAlaNZA L ABBONDANNO U AMORINI F BARLINI S BINI M BOUGAULT R BRUNO M CARDELla G CASINI G AGOSTINO M D' De FILIPPO V De SANCTIS J GERACI E GIUSSANI A GRAMEGNA F GUIOT B KRAVCHUK V la GUIDARA E laNZALONE G Le NEINDRE N MAIOLINO C MARINI P MORELLI L OLMI A PAGANO A PAPA M PIANTELLI S PIRRONE S POLITI G POGGI G PORTO F RUSSOTTO P RIZZO F VANNINI G VANNUCCI L infn laboratori Nazionali del Sud-LNS Catania 95123Italy dipartimento di Fisica Universitàdi Catania I-95129Italy infn sezione di Trieste Trieste I-34127Italy dipartimento di Fisica Universitàdi FirenzeINFN Sezione di Firenze 1-50139Italy LPC Caen IN2P3-CNRS/ENSICAEN and UniversitéF-14050 Caen cedex 5-140France dipartimento di Fisica Universitàdi Bologna and INFN Sezione di Bologna 4-50121Italy infn sezione di Catania I-95129 Italy infn sezione di Firenze I-50139 Italy dipartimento di Fisica Universitàdi Milano and INFN Sezione di Milano1-20126Italy infn laboratori Nazionali di Legnaro 1-35020 Italy Centro Siciliano di Fisica Nucleare e Struttura della Materia Catania 1-95129Italy UniversitàKore Enna 1-94100Italy

The experimental data concerning the58Ni+48Ca reaction at Elab(Ni)=25A MeV,collected by using the CHIMERA 4π device,have been analyzed in order to investigate the competition among different reaction mechanisms for central collisions in the Fermi energy domain.As a main criterion for centrality selection we have chosen the flow angle(flow) method,making an event-by-event analysis that considers the shape of events,as it is determined by the eigenvectors of the experimental kinetic-energy tensor.For the selected central events(flow >60°) some global variables,good to characterize the pattern of central collisions have been constructed.The main features of the reaction products were explored by using different constraints on some of the relevant observables,like mass and velocity distributions and their correlations.Much emphasis was devoted,for central collisions,to the competition between fusion-evaporation processes with subsequent identification of a heavy residue and a possible multifragmentation mechanism of a well defined(if any) transient nuclear system.Dynamical evolution of the system and pre-equilibrium emission were taken into account by simulating the reactions in the framework of transport theories.different approaches have been envisaged(dynamical stochastic BNV calculations + sequential SIMON code,QMD,CoMD,etc.).Preliminary comparison of the experimental data with BNV calculations shows reasonable agreement with the assumption of sequential multifragmentation emission in the mass region of IMFs close to the heavy residues.Possible deviations from sequential processes were found for those IMFs in the region of masses intermediate between the mass of heavy residues and the mass of light IMFs.Further simulations are in progress.The experimental analysis will be enriched also by information obtained inspecting the IMF-IMF correlation function,in order to elucidated the nature of space-time decay property of the emitting source associated with events having the largest IMF multiplicity.

关键词：多重碎裂中心碰撞蒸发过程 MeV 竞争熔合国际货币基金组织事件分析

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Impact of laser chirp on the polarization of terahertz from two-color plasma

引用

Photonics Research 2023年第6期11卷 978-985页

作者： SEN MOU LUCA TOMARCHIO ANNALISA D’ARCO MARTA di FABRIZIO SALVATORE MACIS ALESSANDRO CURCIO LUIGI PALUMBO STEFANO LUPI MASSIMO PETRARCA infn-roma1 and Physics Department University of Rome“La Sapienza”00185 RomeItaly Physics Department University of Rome“La Sapienza”00185 RomeItaly SBAI Department of Basic and Applied Sciences for EngineeringUniversity of Rome“La Sapienza”00161 RomeItaly Centro de laseres Pulsados(CLPU) 37185 VillamayorSalamancaSpain infn-LNF 00044 FrascatiItaly

Two-color plasma,induced by two lasers of different colors,can radiate ultra-broadband and intense terahertz(THz)pulses,which is desirable in many technological and scientific applications.It was found that the polarization of the emitted THz depends on the phase difference between the fundamental laser wave and its second harmonic.Recent investigation suggests that chirp-induced change of pulse overlap plays an important role in the THz yield from two-color plasma.However,the effect of laser chirp on THz polarization remains unexplored.Hereby,we investigate the impact of laser chirp on THz polarization.It is unveiled that the chirp-induced phase difference affects THz polarization.Besides,positive and negative chirps have opposite effects on the variation of the THz polarization versus the phase difference.The polarization of THz generated by a positively chirped pump laser rotates clockwise with an increasing phase difference,while it rotates anticlockwise when generated by a negatively chirped pump laser.

关键词： polarization laser pump

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Two-flavor hybrid stars with the Dyson-Schwinger quark model

引用

Chinese Physics C 2017年第11期41卷 110-116页

作者：魏金标陈欢 H.-J.Schulze School of Mathematics and Physics China University of Geosciences infn sezione di Catania Dipartimento di FisicaUniversitá di Catania

We study the properties of two-flavor quark matter in the Dyson-Schwinger model and investigate the possible consequences for hybrid neutron stars,with particular regard to the two-solar-mass limit.We find that with some extreme values of the model parameters,the mass fraction of two-flavor quark matter in heavy neutron stars can be as high as 30 percent and the possible energy release during the conversion from nucleonic neutron stars to hybrid stars can reach 1052 erg.

关键词： hybrid stars quark matter equation of state Dyson-Schwinger equations

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：