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Structure of Essential Spectrum and Discrete Spectrum of the Energy Operator of Three-Magnon Systems in the Isotropic Ferromagnetic Non-Heisenberg Model with Spin One and Nearest-Neighbor Interactions
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作者 S.M.Tashpulatov 《Journal of Applied Mathematics and Physics》 2019年第4期874-899,共26页
We consider a three-magnon system in the isotropic ferromagnetic Non-Heisenberg model with spin one and with a coupling between nearest-neighbors. The structure of essential spectrum and discrete spectrum of the syste... We consider a three-magnon system in the isotropic ferromagnetic Non-Heisenberg model with spin one and with a coupling between nearest-neighbors. The structure of essential spectrum and discrete spectrum of the systems in a ν-dimensional lattice are investigated. We obtain the lower and upper estimates for the number of three-magnon bound states of the system. 展开更多
关键词 Essential SPECTRUM Discrete SPECTRUM Three-Magnon BOUND STATE Two-Magnon BOUND STATE non-heisenberg Model
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一类非迷向Heisenberg群上凸函数的两类比较原理 被引量:1
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作者 王彦林 郭千桥 《纺织高校基础科学学报》 CAS 2008年第2期171-175,共5页
在一类非迷向Heisenberg群上引入凸函数概念,通过证明零-拉格朗日性质,并用积分估计的方法给出该群上Monge-Ampère型次椭圆算子的比较原理以及非散度型次椭圆算子在锥形区域上的比较原理.
关键词 凸函数 非迷向Heisenberg群 零-拉格朗日性质 比较原理
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非迷向Heisenberg群上的一类带权插值不等式 被引量:1
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作者 王彦林 赵宁波 《纺织高校基础科学学报》 CAS 2009年第3期308-310,335,共4页
在一类非迷向Heisenberg群上研究一阶插值不等式,通过在一类非迷向Heisenberg群上建立一类Hardy型不等式.结合非迷向Heisenberg群上的广义Picone型恒等式,最终得到了非迷向Heisenberg群上一类插值不等式.
关键词 非迷向Heisenberg群 HARDY型不等式 一阶插值不等式
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通信密码学前瞻:量子密码技术 被引量:6
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作者 熊红凯 施惠昌 戴善荣 《上海大学学报(自然科学版)》 CAS CSCD 2000年第2期150-156,共7页
安全性是密码学研究一直追求的目标 ,最近取得飞速发展的量子加密技术综合了量子力学原理和经典密码术 ,具有可证明的安全性 ,同时还能对窃听者的非法侵入进行检测 ,克服了传统密码学的桎梏 ,为未来的网络通信提供了真正确实的保障 .此... 安全性是密码学研究一直追求的目标 ,最近取得飞速发展的量子加密技术综合了量子力学原理和经典密码术 ,具有可证明的安全性 ,同时还能对窃听者的非法侵入进行检测 ,克服了传统密码学的桎梏 ,为未来的网络通信提供了真正确实的保障 .此文讨论了量子加密的相关研究及实用化实验模型 ,详细说明了量子密钥分发协议 。 展开更多
关键词 量子加密 通信密码学 量子密码技术 安全性
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量子密码技术及应用模型 被引量:1
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作者 熊红凯 施惠昌 戴善荣 《通信保密》 2000年第1期4-9,,13,,共7页
最近取得飞速发展的量子加密技术综合了量子力学原理和经典密码术,具有可证明的安全性,同时还能对窃听者的非法侵入进行检测。本文介绍了有关的量子力学理论,针对主要的量子密钥分发协议BB84进行了说明,并在此基础上提供了具体的试验模... 最近取得飞速发展的量子加密技术综合了量子力学原理和经典密码术,具有可证明的安全性,同时还能对窃听者的非法侵入进行检测。本文介绍了有关的量子力学理论,针对主要的量子密钥分发协议BB84进行了说明,并在此基础上提供了具体的试验模型,最后谈论了量子密码技术需要改善的一些问题。 展开更多
关键词 量子密码 量子力学 量子密钥分发
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基于线性与非线性干涉仪的量子精密测量研究进展 被引量:2
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作者 孙思彤 丁应星 刘伍明 《物理学报》 SCIE EI CAS CSCD 北大核心 2022年第13期69-88,共20页
量子精密测量根据量子力学的基本原理,利用光、原子、磁之间的相互作用对待测物理量进行测量.随着实验条件和技术的成熟,如何利用干涉仪进一步提高位相信号这一物理量的测量精度从而打破散粒噪声的限制、突破标准量子极限并逼近海森伯... 量子精密测量根据量子力学的基本原理,利用光、原子、磁之间的相互作用对待测物理量进行测量.随着实验条件和技术的成熟,如何利用干涉仪进一步提高位相信号这一物理量的测量精度从而打破散粒噪声的限制、突破标准量子极限并逼近海森伯极限成为研究的前沿课题.本文阐述了利用线性干涉仪(包括原子/光子干涉仪)与非线性干涉仪调用不同阶段的量子资源在测量过程中提高参数评估精度的几种方法,通过向干涉仪中输入非经典态来实现高精度测量,如压缩态、双数态、NOON态等,还介绍了为直接观测量子态而发展出的弱测量及其在非厄米系统中的应用和为消除参数之间精度制衡而提出的多参数测量.最后,对几种测量方法进行了分析比较,并展望了量子精密测量的发展前景. 展开更多
关键词 量子精密测量 干涉仪 海森伯极限 标准量子极限 非厄米系统
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Heisenberg algebra for noncommutative Landau problem 被引量:7
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作者 李康 曹小华 汪东燕 《Chinese Physics B》 SCIE EI CAS CSCD 2006年第10期2236-2239,共4页
The Landau problem on non-commutative quantum mechanics is studied, where the Heisenberg algebra and the Landau energy levels as well as the non-commutative angular momentum are constructed in detail in non-commutativ... The Landau problem on non-commutative quantum mechanics is studied, where the Heisenberg algebra and the Landau energy levels as well as the non-commutative angular momentum are constructed in detail in non-commutative space and non-commutative phase space respectively. 展开更多
关键词 non-commutative quantum mechanics Landau problem Heisenberg algebra
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Heisenberg群上在p,q-增长条件下非自治积分泛函Lavrentiev现象的缺失
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作者 张君丽 钮鹏程 《陕西师范大学学报(自然科学版)》 CAS CSCD 北大核心 2023年第1期25-29,共5页
Lavrentiev现象是研究积分泛函极小元正则性的一个障碍,在Heisenberg群上给出p,q-增长条件下非自治积分泛函Lavrentiev现象缺失的一个充分条件。
关键词 HEISENBERG群 p q-增长 非自治积分泛函 Lavrentiev现象
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Conventional and Enhanced Canonical Quantizations, Application to Some Simple Manifolds 被引量:1
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作者 Gabriel Y. H. Avossevou Jean V. Hounguevou Daniel Sabi Takou 《Journal of Modern Physics》 2013年第11期1476-1485,共10页
It is well known that the representations over an arbitrary configuration space related to a physical system of the Heisenberg algebra allow to distinguish the simply and non simply-connected manifolds [arXiv:quant-ph... It is well known that the representations over an arbitrary configuration space related to a physical system of the Heisenberg algebra allow to distinguish the simply and non simply-connected manifolds [arXiv:quant-ph/9908.014, arXiv:hep-th/0608.023]. In the light of this classification, the dynamics of a quantum particle on the line is studied in the framework of the conventional quantization scheme as well as that of the enhanced quantization recently introduced by J. R. Klauder [arXiv:quant-ph/1204.2870]. The quantum action functional restricted to the phase space coherent states is obtained from the enhanced quantization procedure, showing the coexistence of classical and quantum theories, a fundamental advantage offered by this new approach. The example of the one dimensional harmonic oscillator is given. Next, the spectrum of a free particle on the two-sphere is recognized from the covariant diffeomorphic representations of the momentum operator in the configuration space. Our results based on simple models also point out the already-known link between interaction and topology at quantum level. 展开更多
关键词 HEISENBERG ALGEBRA CONVENTIONAL QUANTIZATION ENHANCED QUANTIZATION Non Simply-Connected MANIFOLDS Interaction Topology
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Is the Higgs Field a Positive and Negative Mass Planckion Condensate, and Does the LHC Produce Extreme Dark Energy?
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作者 Christopher Pilot 《Journal of High Energy Physics, Gravitation and Cosmology》 2022年第2期432-456,共25页
Assuming a two-component, positive and negative mass, superfluid/supersolid for space (the Winterberg model), we model the Higgs field as a condensate made up of a positive and a negative mass, planckion pair. The con... Assuming a two-component, positive and negative mass, superfluid/supersolid for space (the Winterberg model), we model the Higgs field as a condensate made up of a positive and a negative mass, planckion pair. The connection is shown to be consistent (compatible) with the underlying field equations for each field, and the continuity equation is satisfied for both species of planckions, as well as for the Higgs field. An inherent length scale for space (the vacuum) emerges, which we estimate from previous work to be of the order of, l<sub>+</sub> (0) = l<sub>-</sub> (0) = 5.032E-19 meters, for an undisturbed (unperturbed) vacuum. Thus we assume a lattice structure for space, made up of overlapping positive and negative mass wave functions, ψ<sub>+</sub>, and, ψ<sub>-</sub>, which together bind to form the Higgs field, giving it its rest mass of 125.35 Gev/c<sup>2</sup> with a coherence length equal to its Compton wavelength. If the vacuum experiences an extreme disturbance, such as in a LHC pp collision, it is conjectured that severe dark energy results, on a localized level, with a partial disintegration of the Higgs force field in the surrounding space. The Higgs boson as a quantum excitation in this field results when the vacuum reestablishes itself, within 10<sup>-22</sup> seconds, with positive and negative planckion mass number densities equalizing in the disturbed region. Using our fundamental equation relating the Higgs field, φ, to the planckion ψ<sub>+</sub> and ψ<sub>-</sub> wave functions, we calculate the overall vacuum pressure (equal to vacuum energy density), as well as typical ψ<sub>+</sub> and ψ<sub>-</sub> displacements from equilibrium within the vacuum. 展开更多
关键词 Winterberg Model Quantum Vacuum Higgs Condensate/Composite Model Two-Component Superfluid/Supersolid Model for the Vacuum Positive/Negative Planckion Mass Q-Theory Non-Linear Heisenberg Spinor Theory LHC Energies Dark Energy Lattice Substructure for Space
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Quantum Local Causality in Non-Metric Space
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作者 Fosco Ruzzene 《Journal of Applied Mathematics and Physics》 2018年第6期1179-1198,共20页
The possibility that quantum mechanics is founded on non-metric space has been previously introduced as an alternative consequence of Bell inequalities violation. This work develops the concept further by an analysis ... The possibility that quantum mechanics is founded on non-metric space has been previously introduced as an alternative consequence of Bell inequalities violation. This work develops the concept further by an analysis of the iconic Heisenberg gedanken experiment. No lower bound is found in the gedanken uncertainly relation for a non-metric spatial background. This result has the fundamental consequence that the quantum particle trajectory is retained in non-metric space and time. Assignment of measurement number-values to unmeasured incompatible variables is found to be mathematically incorrect. The current disagreement between different formulations of the empirically verified error-disturbance relations can be explained as a consequence of the structure of space. Quantum contextuality can likewise be explained geometrically. An alternative analysis of the extendedEPRperfect anti-correlation configuration is given. The consensus that local causality is the sole assumption is found to be incorrect. There is also the additional assumption of orientation independence. Inequalities violation does not therefore mandate rejection of local causality. Violation of the assumption of orientation independence implies rejection of metric, non-contextual variables algebraically representing physical quantities. 展开更多
关键词 QUANTUM FOUNDATIONS HEISENBERG Gedanken Experiments Error-Disturbance Relations QUANTUM LOCALITY Non-Metric Space
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基于三种密码体制的会话密钥分配协议 被引量:3
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作者 杨宇光 祝世雄 《通信技术》 2002年第8X期78-80,共3页
简介了基于对称密钥密码体制、公钥密码体制的会话密钥分配协议,着重介绍了基于近年来新兴的量子密码体制的一种会话密钥分配协议,最后给出了几点设计会话密钥分配协议的原则。
关键词 对称密钥密码体制 公钥密码体制 量子密码体制 EPR纠缠 非正交海森堡测不准原理 单量子不可克隆定理
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相互作用突然开启后的反铁磁海森伯模型
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作者 周宗立 章国顺 娄平 《物理学报》 SCIE EI CAS CSCD 北大核心 2011年第3期150-155,共6页
本文以反铁磁海森伯模型为对象,设想了一个相互作用在t=0时刻开启的非平衡体系.在低温近似下,本文利用重整化群流方程方法讨论了该体系可观测量随时间的演化趋势.本文根据此类体系的特点,给出了获得算符时间演化形式的路径,并成功将其... 本文以反铁磁海森伯模型为对象,设想了一个相互作用在t=0时刻开启的非平衡体系.在低温近似下,本文利用重整化群流方程方法讨论了该体系可观测量随时间的演化趋势.本文根据此类体系的特点,给出了获得算符时间演化形式的路径,并成功将其应用于本文所讨论的模型中.其中,本文着重介绍了如何在非平衡自旋体系中应用流方程方法,并利用该方法得到了随时间演化的基态磁化强度,同时论证了该方法处理此类系统的有效性.同时,在与平衡体系基态磁化强度的对比中,发现非平衡可观测量随时间震荡而无法收敛,这一点有别于相互作用突然开启后的Luttinger液体. 展开更多
关键词 非平衡体系 反铁磁海森伯模型 流方程方法 磁化强度
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关于海森堡反铁磁链材料LiVGe_2O_6有限温度相变的理论研究
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作者 黄海 李伟锋 《物理学报》 SCIE EI CAS CSCD 北大核心 2013年第21期344-349,共6页
自旋s=1的海森堡反铁磁链材料LiVGe2O6的磁化率以及核磁共振实验表明该材料在临界温度约为22 K时由顺磁相转变为反铁磁Ne′el相,且低温磁激发谱存在能隙.本文在已有模型哈密顿量的基础上提出了一个低能场论模型—–Ginzburg-Landau理论... 自旋s=1的海森堡反铁磁链材料LiVGe2O6的磁化率以及核磁共振实验表明该材料在临界温度约为22 K时由顺磁相转变为反铁磁Ne′el相,且低温磁激发谱存在能隙.本文在已有模型哈密顿量的基础上提出了一个低能场论模型—–Ginzburg-Landau理论来描述这一反铁磁链材料,并运用这一理论讨论了LiVGe2O6由于自发对称性破缺导致的有限温度相变及相应的磁化率变化情况,理论计算很好地解释了现有的实验结果. 展开更多
关键词 海森堡模型 O(3)非线性仃模型 有限温度相变
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