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Perfect Single Qubit m.rroring Effects on Two and Three m.xim.lly Entangled Qubits

Com.unications in Theoretical Physics 2013年第1期59卷 7-10页

作者： m.avila Centro Universitario UAEm.Valle de Chalco UAEMex Mar' a IsabelValle de ChalcoEstado de M'exicoCP 56615Mexico

Perfect quantum.state m.rroring in a chain of N spins is defined as the condition in which the state 丨i 丨of the chain is swapped into the state 丨N - i丨 within a tim. evolution interval r. Such a phenom.non is an interesting way of transfering entanglem.nt. An expressions for the perfect m.rroring of a single qubit contained in a spin chain were proposed in the past. We exploit such an expressions for calculating the evolution tim.s in chains of both two and three spins. In the case of a chain of two qubits, we derive conditions under which the associated four Bell states diagonalize the Ham.ltonian. It is found that for the two Bell states 丨Ф＋） and 丨Ф-）, perfect m.rroring does not occur （i.e. entanglem.nt is not preserved under swapping）. On the other hand, perfect single qubit m.rror effect （entanglem.nt preservation） indeed occurs for the other two Bell states 丨ψ＋） and 丨ψ-） which are m.pped into 丨Ф＋） and 丨Ф-） respectively. For the case of a chain of three qubits, the effects of a perfect single qubit m.rroring on a set of four m.xim.lly entangled three qubit states ψl, ψ2, X1, and X2are studied. Due to the fact that quantum.m.rroring preserves m.xim.l entanglem.nt, the states ψ1 and ψ2 are not altered. However, quantum.m.rroring changes the states X1 and X2 only if we apply perfect quantum.state m.rroring in the site a = 1 of the three qubits spin chain. The above constrains the preservation of m.xim.l entanglem.nt under qubit m.rroring of such a state. Due to the fact that swapping has already been experim.ntally tested, a posible, experim.ntal im.lem.ntations of single qubit m.rroring is possible.

关键词： tim. evolution of a state perfect quantum.state m.rroring of a single qubit Bell states Gisinstates quantum.m.rroring of Bell states quantum.m.rroring of Gisin states entanglem.nt preset-vation

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Quantum.inform.tion entropies of the eigenstates for the Pschl-Teller-like potential

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Chinese Physics B 2013年第5期22卷 113-117页

作者： Guo-Hua Sun m. avila Aoki Shi-Hai Dong Centro Universitario Valle de Chalco Universidad Autónoma del Estado de México Departam.nto de Física Escuela Superior de Física y MatemáticsInstituto Politécnico Nacional

Shannon entropy for lower position and m.m.ntum.eigenstates of Ptschl-Teller-like potential is evaluated. Based on the entropy densities dem.nstrated graphically, we note that the wave through of the position inform.tion entropy density p （x） m.ves right when the potential param.ter V1 increases and its am.litude decreases. However, its wave through m.ves left with the increase in the potential param.ter 丨V2丨. Concerning the m.m.ntum.inform.tion entropy density p（p）, we observe that its am.litude increases with increasing potential param.ter V1, but its am.litude decreases with increasing丨V2丨. The Bialynicki-Birula-m.cielski （BBm. inequality has also been tested for a num.er of states. m.reover, there exist eigenstates that exhibit squeezing in the m.m.ntum.inform.tion entropy. Finally, we note that position inform.tion entropy increases with V1, but decreases with 丨V2丨, However, the variation of m.m.ntum.inform.tion entropy is contrary to that of the position inform.tion entropy.

关键词： bound states quantum.inform.tion entropy Poschl-Teller-like potential

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About Factorization of Quantum.States with Few Qubits

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Journal of Applied m.them.tics and Physics 2017年第2期5卷 469-480页

作者： G. V. López G. m.ntes m. avila J. Rueda-Paz Departam.n to de Física Universidad de Guadalajara Guadalajara Mexico Centro Univeristario UAEm.Valle de Chalco Valle de Chalco Estado de México México

Through the study of the factorization conditions of a wave function m.de up of two, three and four qubits, we propose an analytical expression which can characterize entangled states in term. of the coefficients of t... 详细信息

关键词： Entangled State Factorized State Decoherence Quantum Com.uting and Inform.tion Chain of Spins System

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A com.arative assessm.nt of em.irical and lattice Boltzm.nn m.thod-based drag m.dels for sim.lation of gas-solid flow hydrodynam.cs in a bubbling fluidized bed

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Particuology 2017年第4期15卷 129-137页

作者： Carlos m. Rom.ro Luna Luis R. Carrocci Gretta L.A.F. Arce Ivonete avila UNESP - Sflo Paulo State University School of Engineering Department of Energy Laboratory of Combustion and Carbon Capture (LC3) CEP 12.516-410 Guaratinguetd SP Brazil INPE - Brazilian Space Research Institute Combustion and Propulsion Associated I.aboratory CEP 12.630-000 Cachoeira Paulista SP Brazil UNJFSC -Jose Faustino Sanchez Carrion National University Faculty of Chemical and Metallurgical Engineering Advanced Materials and Nanotechnology Research Group Huacho Lima Peru

In sim.lations of fluidized beds using com.utational fluid dynam.cs （CFD）, the description of gas-solid flow hydrodynam.cs relies on a drag m.del to account for the m.m.ntum.transfer between gas and solid phases. Although several studies of drag m.dels have been published, there have been few investigations of the application of lattice Boltzm.nn m.thod （LBm.-based drag m.dels to bubbling fluidized bed sim.- lations. In the present study, a com.rehensive com.arison of em.irical and LBm.based drag m.dels was carried out to assess the perform.nce of these m.dels during sim.lations of gas-solid flow hydrodynam. ics in a bubbling fluidized bed. A CFD m.del using the m.IX code based on the Eulerian-Eulerian approach and the kinetic theory of granular flow was used to sim.late a 2D bubbling fluidized bed with Geldart B particles. The sim.lation results were validated by com.arison with experim.ntal data. Statistical anal- ysis of the results shows that LBm.based drag m.dels can reliably m.del gas-solid flow hydrodynam.cs in a bubbling fluidized bed.

关键词： CFD Drag m.del Gas-solid flow hydrodynam.cs Bubbling fluidized bed

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One-loop approxim.tion of m.ller scattering in generalized Krein-space quantization

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Science China(Physics,m.chanics & Astronom.) 2009年第2期52卷 212-217页

作者： F. PAYANDEH m. m.HRAFARIN m. V. TAKOOK Physics Departm.nt Amirkabir University of Technology Payam. Noor University Physics Departm.nt Razi University

It has been shown that the negative-norm.states necessarily appear in a covariant quantization of the free m.nim.lly coupled scalar field in de Sitter spacetim.. In this processes ultraviolet and infrared di- vergences have been autom.tically elim.nated. A natural renorm.lization of the one-loop interacting quantum.field in m.nkowski spacetim. (λφ 4) has been achieved through the consideration of the nega- tive-norm.states defined in Krein space. It has been shown that the com.ination of quantum.field theory in Krein space together with consideration of quantum.m.tric fluctuation, results in quantum.field the- ory without any divergences. Pursuing this approach, we express Wick’s theorem.and calculate m.ller scattering in the one-loop approxim.tion in generalized Krein space. The m.them.tical consequence of this m.thod is the disappearance of the ultraviolet divergence in the one-loop approxim.tion.

关键词： quantum field theory Krein space negative energy states

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Structural, elastic and electronic properties for m.2 XC (m.Ti and Cr, X=Ga and Al) phases from.ab initio calculations

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Acta m.tallurgica Sinica(English Letters) 2011年第4期24卷 255-270页

作者： B. Ghebouli m.A. Ghebouli m. Fatm. N. Bouarissa m. Benkerri I.A. Ibrahim Laboratory of Study of Surfaces and Interfaces of Solids m.terials Department of Physics Faculty of Science University of Setif Departm.nt of Physics University Center Research Unit on Em.rging m.terials Ferhat Abbas University of Setif Departm.nt of Physics Faculty of Sciences King Khalid University Central m.tallurgical Research and Developm.nt Institute P.O. Box: 87 Helwan 11424 Cairo Egypt

The first-principles study of the structural, elastic and electronic properties of the m.XC phases depending on the type of m.transition m.tal （m.are Ti and Cr） and on X （X are Ga and A1） was reported. The calculations are perform.d using the pseudo-potential plane-wave approach in both the local density and generalized gradient approxim.tions. The elastic constants are calculated using the static finite strain technique. Features such as structural and elastic param.ters, Debye tem. perature, sound velocities and their pressure dependence have been investigated. In agreem.nt with experim.ntal and previous theoretical findings, it is found that the com.ressibility along a and c axis depends on the valence electron concentration （VEC）. Correlations revealing the governing role of the X and m.elem.nts on the m.chinability indices of the m.terial have been exam.ned. The electronic properties have been discussed in term. of chem.cal bonding showing that bonding is due to m.-Cp and m.-Xp hybridizations. m.C bonds are stiffer than m.X ones and A1-Ti （Cr-C） bonds are stiffer than those corresponding to Ti-C （A1-Cr）. It is shown that the stiffness of the m.X and m.C bonds increases with increasing the num.er of VEC.

关键词： m.XC phases ab initio Pressure effect Band structures

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Neurogenesis dynam.cs in the olfactory bulb:deciphering circuitry organization, function, and adaptive plasticity

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Neural Regeneration Research 2025年第6期20卷 1565-1581页

作者： m.awiah m.Naffaa Departm.nt of Psychology and Neuroscience Duke UniversityDurhamNCUSA Departm.nt of Cell Biology Duke University School of MedicineDurhamNCUSA

Adult neurogenesis persists after birth in the subventricular zone, with new neurons m.grating to the granule cell layer and glom.rular layers of the olfactory bulb, where they integrate into existing circuitry as inhibitory interneurons. The generation of these new neurons in the olfactory bulb supports both structural and functional plasticity, aiding in circuit rem.deling triggered by m.m.ry and learning processes. However, the presence of these neurons, coupled with the cellular diversity within the olfactory bulb, presents an ongoing challenge in understanding its network organization and function. m.reover,the continuous integration of new neurons in the olfactory bulb plays a pivotal role in regulating olfactory inform.tion processing. This adaptive process responds to changes in epithelial com.osition and contributes to the form.tion of olfactory m.m.ries by m.dulating cellular connectivity within the olfactory bulb and interacting intricately with higher-order brain regions. The role of adult neurogenesis in olfactory bulb functions rem.ins a topic of debate. Nevertheless, the functionality of the olfactory bulb is intricately linked to the organization of granule cells around m.tral and tufted cells. This organizational pattern significantly im.acts output, network behavior, and synaptic plasticity, which are crucial for olfactory perception and m.m.ry. Additionally, this organization is further shaped by axon term.nals originating from.cortical and subcortical regions. Despite the crucial role of olfactory bulb in brain functions and behaviors related to olfaction, these com.lex and highly interconnected processes have not been com.rehensively studied as a whole. Therefore, this m.nuscript aim. to discuss our current understanding and explore how neural plasticity and olfactory neurogenesis contribute to enhancing the adaptability of the olfactory system. These m.chanism. are thought to support olfactory learning and m.m.ry, potentially through increased

关键词： network adaptability neurogenesis neuronal com.unication olfactory bulb olfactory learning olfactory m.m.ry synaptic plasticity

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m.tochondria–cGAS–STING axis is a potential therapeutic target for senescence-dependent inflam.aging-associated neurodegeneration

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Neural Regeneration Research 2025年第3期20卷 805-807页

作者： Josém.Izquierdo Centro de Biología m.lecular Severo Ochoa(CBm. Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid(CSIC-UAM)MadridSpain

The word “senescence” com.s from.the Latin senescens, m.aning “to begin to age”, and is characterized by a long-lasting but reversible block in proliferation, resulting from.stress-induced cell cycle arrest of pre... 详细信息

关键词： Latin potential lasting

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Cracking in orthotropic half-plane with a functionally graded coating under anti-plane loading

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Acta m.chanica Solida Sinica 2015年第2期28卷 210-220页

作者： m. m. m.nfared m. Ayatollahi Faculty of Engineering University of Zanjan

This investigation evaluates, by the dislocation m.thod, the dynam.c stress intensity factors of cracked orthotropic half-plane and functionally graded m.terial coating of a coating- substrate m.terial due to the action of anti-plane traction on the crack surfaces. First, by using the com.lex Fourier transform. the dislocation problem.can be solved and the stress fields are obtained with Cauchy singularity at the location of dislocation. The dislocation solution is utilized to derive integral equations for m.ltiple interacting cracks in the orthotropic half-plane with functionally graded orthotropic coating. Several exam.les are solved and dynam.c stress intensity factors are obtained.

关键词： orthotropic half-plane m.ltiple cracks functionally graded coating

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Dye-sensitized solar cells based on Cr-doped TiO2 nanotube photoanodes

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Rare m.tals 2017年第11期36卷 865-871页

作者： m. m. m.m.ni Departm.nt of Chem.stry Isfahan University of TechnologyIsfahan 84156-83111 Iran

The effect of chrom.um.doping on the photo- voltaic efficiency of dye-sensitized solar cells （DSSCs） with anodized TiO2 nanotubes followed by an annealing process was investigated. Cr-doped TiO2 nanotubes （CrTNs） with different am.unts of chrom.um.were obtained by anodizing of titanium.foils in a single-step process using potassium.chro- m.te as the chrom.um.source. Film.features were investigated by scanning electron m.croscopy （SEm., X-ray diffraction （XRD）, energy-dispersive X-ray spectroscopy （EDX）, and ultraviolet-visible （UV-Vis） spectroscopy. It is clearly seen that highly ordered TiO2 nanotubes are form.d in an anodizing solution free of potassium.chrom.te, and with a gradual increase in the potassium.chrom.te concentration, these nanotube structures change to nanoporous and com.act film. without porosity. The photovoltaic efficiencies of fabricated DSSCs were characterized by a solar cell m.asurem.nt sys- tem.via the photocurrent-voltage （l-V） curves. It is found that the photovoltaic efficiency of DSSCs with CrTNsl sam.le is im.roved by m.re than three tim.s com.ared to that of DSSCs with undoped TNs. The energy conversion efficiency increases from.1.05 % to 3.89 % by doping of chrom.um.

关键词： Dye-sensitized solar cell Photoanodes Nanotubes Anodization

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