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Dissipative dynamics of an entangled three-qubit system via non-Hermitian Hamiltonian: Its correspondence with markovian and non-markovian regimes

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Chinese Physics B 2021年第3期30卷 283-292页

作者： m Rastegarzadeh m k Tavassoly Laser and Optics Group Faculty of PhysicsYazd UniversityYazd 89195-741Iran

We investigate an entangled three-qubit system in which only one of the qubits experiences the decoherence effect by considering a non-Hermitian Hamiltonian,while the other two qubits are isolated,i.e.,do not interact with environment,***,the time evolution of the density matrix(for the pure as well as mixed initial density matrix)and the corresponding reduced density matrices are obtained,by which we are able to utilize the dissipative non-Hermitian Hamiltonian model with markovian and non-markovian regimes via adjusting the strange of the non-Hermitian term of the total Hamiltonian of the under-considered system.

关键词： non-Hermitian Hamiltonian entanglement concurrence measure markovian and non-markovian regimes

minimum dose path planning for facility inspection based on the discrete Rao-combined ABC algorithm in radioactive environments with obstacles

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Nuclear Science and Techniques 2023年第4期34卷 26-40页

作者： kwon ryong Hong Su Il O Ryon Hui k.m Tae Song k.m Jang Su k.m Faculty of Energy Science Kim Il Sung UniversityPyongyangDemocratic People’s Republic of Korea High-Tech Research&Development Centre Institute of Information TechnologyKim Il Sung UniversityPyongyangDemocratic People’s Republic of Korea

Workers who conduct regular facility inspections in radioactive environments will inevitably be affected by ***,it is important to optimize the inspection path to ensure that workers are exposed to the least amount of *** study proposes a discrete Rao-combined artificial bee colony(ABC)algorithm for planning inspection paths with minimum exposure doses in radioactive environments with *** this algorithm,retaining the framework of the traditional ABC algorithm,we applied the directional solution update rules of Rao algorithms at the employed bee stage and onlooker bee stage to increase the exploitation ability of the algorithm and implement discretion using the swap operator and swap *** increase the randomness of solution generation,the chaos algorithm was used at the initialization *** k-opt operation technique was introduced at the scout bee stage to increase the exploration ability of the *** path planning in an environment with complex structural obstacles,an obstacle detour technique using a recursive algorithm was *** evaluate the performance of the proposed algorithm,we performed experimental simulations in three hypothetical environments and compared the results with those of improved particle swarm optimization,chaos particle swarm optimization,improved ant colony optimization,and discrete Rao’s *** experimental results show the high performance of the proposed discrete Rao-combined ABC algorithm and its obstacle detour capability.

关键词： minimum dose Path planning Nuclear facility inspection ABC algorithm Rao algorithms Swap sequence k-opt operation

Recent biotechnological trends in lactic acid bacterial fermentation for food processing industries

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Systems microbiology and Biomanufacturing 2022年第1期2卷 14-40页

作者： Tirath Raj k.Chandrasekhar A.Naresh k.mar sang-Hyoun k.m School of Civil and Environmental Engineering Yonsei UniversitySeoul 03722Republic of Korea

Lactic acid bacteria(LAB)are non-mobile,gram-positive,non-spore-forming,micro-aerophilic microorganisms widely explored as starter cultures food industry to enhance the gustatory,nutritional value,imparts appetizing favour,texture to milk,vegetative,meat foods and prolongs their shelf *** vast review emphasis various LABs widely explored in the food ***,we have summarized the classifcation of LAB strains,their metabolic pathways for biosynthesis of lactic acid,ethanol,acetic acid and demonstrated their application in various food industries for making fermented milk(yoghurt),cheese,beverages,bread,and animal *** wide spectrum of LAB-based probiotics,bacteriocins,exopolysaccharides,bio preservative and their relevant benefts towards human health has also been ***,LAB bacteriocins and probiotics in food application may limit the growth of pathogenic,while boosting health *** exopolysaccharides have interesting characteristics for the fermented food industry as new functional *** on,we have discussed the various advancement in metabolic engineering,synthetic biology tools,which have gained considerable interest to elucidate the biosynthetic pathway for tailoring cellular metabolism for high activity.

关键词： Lactic acid bacteria Fermentation Exopolysaccharides Carbohydrates Bacteriocins Probiotics

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维普期刊数据库

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用相关函数优化法计算离散线性水文模型参数

水科学进展 1991年第2期2卷 113-119页

作者：王广德 k.m阿科纳章上游中国科学院国家计委地理研究所爱尔兰国立大学戈尔维学院工程水文系成都科技大学水利系

借助于日降雨和出流资料系列,采用相关函数优化方法确定离散线性水文模型参数是一种新的方法。文中选用4个流域8年日降雨和径流资料系列来检验相关函数优化法(6年作为率定期,2年作为验证期),所得结果与常规最小二乘法计算的结果进行比... 详细信息

借助于日降雨和出流资料系列,采用相关函数优化方法确定离散线性水文模型参数是一种新的方法。文中选用4个流域8年日降雨和径流资料系列来检验相关函数优化法(6年作为率定期,2年作为验证期),所得结果与常规最小二乘法计算的结果进行比较表明:新方法计算精度比常规最小二乘法计算的精度有所提高,常规最小二乘法仅是相关函数优化法的一种特例。

关键词：相关函数离散线性水文模型

CAVITATION NUCLEI:EXPERImENTS AND THEORY

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Journal of Hydrodynamics 2009年第2期21卷 176-189页

作者： mφRCH k.A. Department of Physics and Center of Quantum Protein DK-2800 Kongens LyngbyDenmark

The Swedish astrophysicist and Nobel Prize winner Hannes Alfven said： Theories come and go -- the experiment is here forever. Often a theory, which we set up to describe an observed physical phenomenon, suffers from the lack of knowledge of decisive parameters, and therefore at best the theory becomes insufficient. Contrary, the experiment always reveals nature itself, though at prevailing experimental conditions. With essential parameters being out of control and even maybe unidentified, apparently similar experiments may deviate way beyond our expectations. However, these discrepancies offer us a chance to reflect on the character of the unknown parameters. In this way non-concordant experimental results may hold the key to the development of better theories - and to new experiments for the testing of their validity. Cavitation and cavitation nuclei are phenomena of that character.

关键词： cavitation nuclei gas bubbles surface nano voids scanning tunneling microscopy atomic force microscopy

Deformed photon-added entangled squeezed vacuum and one-photon states: Entanglement, polarization, and nonclassical properties

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Chinese Physics B 2016年第4期25卷 47-56页

作者： A karimi m k Tavassoly Atomic and molecular Group Faculty of Physics Yazd University Physics Group Islamic Azad University of Abadeh The Laboratory of Quantum Information Processing Yazd University

In this paper, after a brief review on the entangled squeezed states, we produce a new class of the continuous-variable- type entangled states, namely, deformed photon-added entangled squeezed states. These states are obtained via the iterated action of the f-deformed creation operator A = f（n）a＋ on the entangled squeezed states. In the continuation, by studying the criteria such as the degree of entanglement, quantum polarization as well as sub-Poissonian photon statistics, the two- mode correlation function, one-mode and two-mode squeezing, we investigate the nonclassical behaviors of the introduced states in detail by choosing a particular f-deformation function. It is revealed that the above-mentioned physical properties can be affected and so may be tuned by justifying the excitation number, after choosing a nonlinearity function. Finally, to generate the introduced states, we propose a theoretical scheme using the nonlinear Jaynes-Cummings model.

关键词： squeezed states deformed photon-added entangled states entanglement quantum polarization

Failure pattern in ceramic metallic target under ballistic impact

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Defence Technology（防务技术） 2024年第10期40卷 173-190页

作者： m.A.Iqbal m.k.khan Department of Civil Engineering Indian Institute of Technology RoorkeeRoorkee 247667India Department of Civil Engineering Aligarh Muslim UniversityAligarh202002India

The ballistic resistance and failure pattern of a bi-layer alumina 99.5%-aluminium alloy 1100-H12 target against steel 4340 ogival nosed projectile has been explored in the present experimental cum numerical *** the experimental investigation,damage induced in the ceramic layer has been quantified in terms of number of cracks developed and failure zone *** resultant damage in the backing layer has been studied with variation in the bulge and perforation hole in the backing layer with the varying incidence *** discussion of the experimental results has been further followed by three dimensional finite element computations using ABAQUS/Explicit finite code to investigate the behaviour of different types of bi-layer targets under multi-hit projectile *** JH-2 constitutive model has been used to reproduce the behaviour of alumina 99.5%and JC constitutive model has been used for steel 4340 and aluminium alloy *** total energy dissipation has been noted to be of lesser magnitude in case of sub-sequential impact in comparison to simultaneous impact of two *** distance between the impact points of two projectiles also effected the ballistic resistance of bi-layer *** ballistic resistance of single tile ceramic front layer and four tile ceramic of equivalent area found to be dependent upon the boundary conditions provided to the target.

关键词： Ballistic resistance Bi-layer target Ceramic metal armour multi-hit impact Finite element modelling

The performance of a dissipative electrooptomechanical system using the Caldirola–kanai Hamiltonian approach

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Communications in Theoretical Physics 2023年第7期75卷 123-131页

作者： m m Atabaki m k Tavassoly A Behjat m Hassani Nadiki k Javidan Optics and Laser Group Faculty of PhysicsYazd UniversityYazdIran Department of Physics School of SciencesFerdowsi University of MashhadMashhad 91775-1436Iran

By combining all optical,electronic,and mechanical capabilities,electro-optomechanical systems,along with the use of mechanical displacement,the conversion of low-frequency electrical signals into much higher-frequency optical signals is *** process provides several capabilities that have very important applications in various fields,including classical,as well as quantum *** this regard,the inevitable effect of dissipation on the performance indicators of such systems is one of the important issues affecting its *** approach for investigating the effect of dissipation is based on a time-dependent Hamiltonian has been known as the Caldirola-kanai(Ck)Hamiltonian,wherein the exponentially increasing mass,i.e.m(t)=m0(eγt)enters the mechanical oscillator *** this approach shows that,the performance of the system under the influence of dissipation with Ck Hamiltonian formalism,in which the dissipation terms are embedded in the Hamiltonian,are more logical,analytical,and reliable than considering the effect of dissipation with the phenomenological method(including the dissipation effects in the equations of motion by hand),which has been recently used in Bagci et al.(Nature,507,81,2014).In our method,it is also possible to monitor the performance of the system via the adjustment of dissipation components,i.e.,resistance R and reactance L(and Ck damping parameterγ)in the electrical(mechanical membrane)part of the system.

关键词： dissipative system electro-optomechanical system Caldirola-kanai Hamiltonian

Generalization properties of restricted Boltzmann machine for short-range order

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Chinese Physics B 2023年第6期32卷 556-562页

作者： m A Timirgazin A k Arzhnikov Udmurt Federal Research Center Ural Branch of RASIzhevsk 426067Russia

A biased sampling algorithm for the restricted Boltzmann machine(RBm) is proposed, which allows generating configurations with a conserved quantity. To validate the method, a study of the short-range order in binary alloys with positive and negative exchange interactions is carried out. The network is trained on the data collected by monte–Carlo simulations for a simple Ising-like binary alloy model and used to calculate the Warren–Cowley short-range order parameter and other thermodynamic properties. We demonstrate that the proposed method allows us not only to correctly reproduce the order parameters for the alloy concentration at which the network was trained, but can also predict them for any other concentrations.

关键词： machine learning short-range order Ising model restricted Boltzmann machine