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Quantum correlations and entanglement in coupled optomechanical resonators with photon hopping via gaussian interferometric power analysis

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Chinese physics B 2024年第5期33卷 204-211页

作者： Y.Lahlou B.Maroufi M.Daoud LpHE-MS Department of PhysicsFaculty of SciencesMohammed V UniversityRabatMorocco LpMS Department of PhysicsFaculty of SciencesIbn Tofail UniversityKénitraMorocco

Quantum correlations that surpass entanglement are of great importance in the realms of quantum information processing and quantum ***,for quantum systems prepared in pure states,it is difficult to differentiate between quantum entanglement and quantum ***,this indistinguishability is no longer holds for mixed *** contribute to a better understanding of this differentiation,we have explored a simple model for both generating and measuring these quantum *** study concerns two macroscopic mechanical resonators placed in separate Fabry–pérot cavities,coupled through the photon hopping *** system offers a comprehensively way to investigate and quantify quantum correlations beyond entanglement between these mechanical *** key ingredient in analyzing quantum correlation in this system is the global covariance *** forms the basis for computing two essential metrics:the logarithmic negativity(E_(N)^(m))and the gaussian interferometric power(p_(g)^(m)).These metrics provide the tools to measure the degree of quantum entanglement and quantum correlations,*** study reveals that the gaussian interferometric power(p_(g)^(m))proves to be a more suitable metric for characterizing quantum correlations among the mechanical modes in an optomechanical quantum system,particularly in scenarios featuring resilient photon hopping.

关键词： quantum correlations entanglement gaussian interferometric power logarithmic negativity optomechanics photon hopping

Electronic and thermoelectric properties of YbMg_(2)X_(2)(X=p,As,Sb,Bi)zintl compounds by first-principles method

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Journal of Rare Earths 2024年第1期42卷 147-154,I0006页

作者： Sajid Khan Dil Faraz Khan R.Neffati Tariq Usman Muhammad Waqar Ahsraf Shamim Khan Saeed Ullah Jan g.Murtaza department of physics University of Science&Technology BannuBannu28100Pakistan department of physics Faculty of ScienceKing Khalid UniversityP.O.Box 9004AbhaSaudi Arabia Laboratoire de physique de La Matiere Condensee Departement de PhysiqueFaculte des Sciences de TunisUniversite Tunis El ManarCampus Universitaire1060TunisTunisia department of physics Shaoxing UniversityShaoxing312000China department of Mathematics&Natural Sciences Prince Mohammad Bin Fahd UniversityAlkhobar31952Saudi Arabia Materials Modeling Lab Department of PhysicsIslamia College Peshawar25120KhyberPakhtunkhwaPakistan

In this work the structural,electronic and thermoelectric properties of YbMg_(2)X_(2)(X=p,As,Sb,Bi)zintl compounds were investigated comprehensively using first principles *** electronic properties were studied using pBE ggA,TB-mBJ and hybrid(YS-pBE0)*** the structural parameters of optimized structures are in harmonious agreement to the available *** band structure study illustrates that the titled materials manifest metallic and semi metallic nature using pBE and TB-mBJ potentials while they show wide band gap semiconducting behavior by following hybrid(YS-pBE0)*** density of states(TDOS)and partial density of states(pDOS)were also calculated to glimpse the contribution of orbitals of atoms in the formation of *** properties were studied by using BoltzTrap2 code employed to *** get enormous values of Seebeck coefficient(S),power factor(pF)and thermoelectric figure of merit(ZT)for all the samples YbMg_(2)X_(2)(X=p,As,Sb,Bi),Moreover,the overwhelming transport properties for the titled compounds indicate the optimum level of carriers’concentration which pinpoints these materials to be better thermoelectrics in the 1-2-2 zintl family.

关键词： Zintl compounds Hybrid functional Band structure Thermoelectrics Rare earths

Optoelectronic and thermoelectric properties of spinel chalcogenides HgLa2X4（X=S and Se）:A first-principles study

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Journal of Rare Earths 2024年第10期42卷 1927-1936页

作者： Aparna Dixit Inas A.Ahmed Jisha Annie Abraham Zeinhom M.El-Bahy Mumtaz Manzoor Sajad Ahmad Dar Ramesh Sharma department of Basic Science and Humanities Pranveer Singh Institute of Technology department of Chemistry Faculty of ScienceKing Khalid University department of physics National Defence Academy department of Chemistry Faculty of ScienceAl-Azhar University Institute of physics Slovak Academy of Sciences department of physics Motilal Vigyan Mahavidyalya College department of Applied Science Feroze Gandhi Institute of Engineering and Technology

We investigated spinel chalcogenides HgLa2（S/Se）4by using density function theory,and scrutinized the structural,optical,electrical,mechanical and thermoelectric transport characteristics of HgLa2（S/Se）4spinel *** enthalpy of formation,energy of cohesion,and energy volume optimum plots were used to obtain the stability as well as the perfect ground state of these *** ductility of these materials was the best illustrated with the help of poisson's and pugh's *** band gap results were obtained using Trans and Blaha modified Becke-Johanson potential（TB-mBJ）.Both the materials present semi-conducting nature with direct band gap equal to 1.449 and 0.892 eV respectively for HgLa2S4and *** were also made for optical characteristics with the values of dielectric function,absorption coefficient,optical conductivity,reflectivity,and refractive *** to the findings,both of these materials are suitable for infrared optoelectronic *** materials were found to have promising optoelectronic and thermoelectric applications after their optical properties and transport aspects were *** tiny levels of temperature conductivities,substantial am ounts of power conductivities,the figure of merit（more than unity）,as well as Seebecs coefficients all point to the potential use of both the materials in thermoelectric power generators.

关键词： Density functional theory Direct band gap Optoelectronic power factor Semiconductors Thermoelectric

Quantum dynamics within curved thin layers with deviation

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Chinese physics B 2024年第7期33卷 502-507页

作者：程润赵浩罗翠柏周璇王必利李延标王骏 physics department of Basic department Army Engineering University of PLANanjing 211101China National Laboratory of Solid State Microstructure Collaborative Innovation Center of Advanced Microstructuresand School of PhysicsNanjing UniversityNanjing 210093China School of physics and Electronics Hunan UniversityChangsha 410082China department of physics Anhui Normal UniversityWuhu 241002China

Combining the deviation between thin layers' adjacent surfaces with the confining potential method applied to the quantum curved systems,we derive the effective Schr?dinger equation describing the particle constrained within a curved layer,accompanied by a general geometric potential V_(gq) composed of a compression-corrected geometric potential V_(gq)~*and a novel potential V_(gq)~(**) brought by the *** this analysis to the cylindrical layer emerges two types of deviation-induced geometric potential,resulting from the the cases of slant deviation and tangent deviation,respectively,which strongly renormalizes the purely geometric potential and contribute to the energy spectrum based on a very substantial deepening of bound states they offer.

关键词： confining potential method quantum mechanics curved thin layer

probing inelastic signatures of dark matter detection via polarized nucleus

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Chinese physics C 2024年第10期48卷 72-85页

作者： Zai Yun Junwei Sun Bin Zhu Xuewen Liu department of physics Yantai UniversityYantai 264005China

We investigate the inelastic signatures of dark matter-nucleus interactions,explicitly focusing on the ramifications of polarization,dark matter splitting,and the Migdal *** detection experiments,crucial for testing the existence of dark matter,encounter formidable obstacles,such as indomitable neutrino backgrounds and elusive determination of dark matter *** overcome these challenges,we explore the potential of polarized-target dark matter scattering,examining the impact of nonvanishing mass splitting,and the role of the Migdal effect in detecting dark *** analysis demonstrates the valuable utility of the polarized triple-differential event rate as an effective tool for examining inelastic dark *** enables us to investigate angular and energy dependencies,providing valuable insights into the scattering process.

关键词： inelastic dark matter polarized target dark matter direct detection

Electrical characteristics of a fractional-order 3×n Fan network

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Communications in Theoretical physics 2024年第4期76卷 176-187页

作者： Zhi-Zhong Tan Xin Wang department of physics Nantong UniversityNantong 226019China

In this article a new achievement of fractional-order 3×n Fan networks is *** the first step,the RT-I method is used to derive the general formulae of the equivalent impedance of fractional-order 3×n Fan *** the second part,the effects of five system parameters(L,C,n,α and β)on amplitude-frequency and phase-frequency characteristics are *** the same time,the amplitude-frequency and phase-frequency characteristics of the fractional order 3×n Fan network are revealed by Matlab *** work has important theoretical and practical significance for resistor network models in the field of natural science and engineering technology.

关键词： fractional-order circuit amplitude-frequency characteristics phase-frequency characteristics RT-V theory

phonon-blockade-based multiple-photon bundle emission in a quadratically coupled optomechanical system

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Frontiers of physics 2024年第3期19卷 207-215页

作者： Ye-Jun Xu Hong Xie Interdisciplinary research Center of Quantum and photoelectric Information Chizhou UniversityChizhou 247000China department of Mathematics and physics Fujian Jiangxia UniversityFuzhou 350108China

We propose a scheme to realize antibunched multiple-photon bundles based on phonon blockade in a quadratically coupled optomechanical *** adjusting the detunings to match the conditions of phonon blockade in the photon sidebands,we establish super-Rabi oscillation between zero-photon state and multiple-photon states with adjustable super-Rabi frequencies under appropriate single-phonon resonant *** the system dissipation into account,we numerically calculate the standard and generalized second-order functions of the cavity mode as well as the quantum trajectories of the state populations with Monte Carlo simulation to confirm that the emitted photons form antibunched multiple-photon ***,the desirable n-photon states are reconstructed after a direct phonon emission based on phonon blockade,and thus the single-phonon emission heralds the cascade emission of n-photon *** proposal shows that the optomechanical system can simultaneously behave as antibunched multiple-photon emitter and single-phonon *** a nonclassical source could have potential applications in quantum information science.

关键词： multiple-photon bundle emission phonon blockade optomechanical system

B-L model with D_(4)×Z_(4)×Z_(2)symmetry for fermion mass hierarchies and mixings

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Chinese physics C 2024年第6期48卷 11-30页

作者： V.V.Vien department of physics Tay Nguyen UniversityDaklakVietnam

We constructed a gauge B-L model with D_(4)×Z_(4)×Z_(2)symmetry to explain the quark and lepton mass hierarchies and their mixings with realistic Cp phases via the type-I seesaw *** quark mases,three quark mixing angles,and the Cp phase in the quark sector take the central values whereas Yukawa couplings in the quark sector are diluted in a range of difference of three orders of magnitude by the perturbation theory at the first *** the neutrino sector,a small neutrino mass is achieved by the type-I seesaw *** inverted and normal neutrino mass hierarchies are consistent with the experimental *** predicted sum of neutrino masses for normal and inverted hierarchies,the effective neutrino masses,and the Dirac Cp phase are also consistent with recently reported limits.

关键词： flavor symmetries quark and lepton masses and mixing extensions of electroweak gauge sector neutrino mass and mixing non-standard-model neutrinos right-handed neutrinos D4 discrete symmetry

Verifiable quantum secret sharing scheme based on orthogonal product states

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Chinese physics B 2024年第7期33卷 178-187页

作者：白晨明刘璐张素娟 department of Mathematics and physics Shijiazhuang Tiedao UniversityShijiazhuang 050043China

In the domain of quantum cryptography,the implementation of quantum secret sharing stands as a pivotal *** this paper,we propose a novel verifiable quantum secret sharing protocol using the d-dimensional product state and Lagrange interpolation *** protocol is initiated by the dealer Alice,who initially prepares a quantum product state,selected from a predefined set of orthogonal product states within the C~d■C~d ***,the participants execute unitary operations on this product state to recover the underlying ***,we subject the protocol to a rigorous security analysis,considering both eavesdropping attacks and potential dishonesty from the ***,we conduct a comparative analysis of our protocol against existing *** scheme exhibits economies of scale by exclusively employing quantum product states,thereby realizing significant cost-efficiency *** terms of access structure,we adopt a(t, n)-threshold architecture,a strategic choice that augments the protocol's practicality and suitability for diverse ***,our protocol includes a rigorous integrity verification mechanism to ensure the honesty and reliability of the participants throughout the execution of the protocol.

关键词： quantum secret sharing quantum product state threshold scheme unitary operations