搜索结果: 46-60 共查到“物理学 mathematics”相关记录130条 . 查询时间(0.048 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Extension of Kahler currents
Kahler-currents 扩展 解析奇点
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2023/4/14
In this lecture I will talk about Collins-Tosatti's proof on the extension of Kahler currents with analytic singularities.
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：一个和量子输运相关的双正交系综
量子输运 双正交系综综 一维量子输运
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2023/4/14
我们讨论一个特殊双正交（biorthogonal）系综的整体和局部极限行为。这个双正交系综源自对一维量子输运问题的研究，对应一维量子输运的Dorokhov-Mello-Pereyra-Kummar（DMPK）方程的diffusive regime 的近似解。我们从Riemann-Hilbert 问题的角度考虑这个双正交系综。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：量子态的层析
量子态 量子信息 量子力学
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2023/4/17
量子态的层析是量子信息里面的一个重要和热点问题. 这个报告介绍量子态层析在各种测量模型下需要的资源数目，包括 (1) 任意测量；(2) 独立测量；(3) 泡利测量. 还报告重叠量子态的层析问题及紧的界。
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Quantum Error Correction: Fault-tolerance and Universality
量子纠错 容错性 通用性
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2023/4/17
There is a big gap between the so-called NISQ (noisy intermediate-scale quantum) and FTQ (fault-tolerant quantum) computing. Recently, we introduced QEQ (quasi-exact quantum) computing, which lies in ...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Convexity, Uniqueness, and Stability of the Regular Shock Reflection-diffraction Problem
规则冲击 反射衍射问题 凸性 唯一性 稳定性
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2023/4/17
We will talk about our recent results on the convexity, uniqueness, and stability of regular reflection solutions for the potential flow equation in a natural class of self-similar solutions. The appr...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Equivalence Checking of Quantum Circuits by Nonlocality
量子电路 非局域 等价性检验
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2023/4/17
Suppose two quantum circuit chips are located at different places, for which we do not have any prior knowledge, and cannot see the internal structures either. In such a situation, a realistic and fun...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Nonrelativistic limit of the Klein-Gordon equations: convergence rates and long time approximations
克莱因-戈登方程 非相对论极限 收敛率 长时间近似
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2023/4/18
We study the nonrelativistic limit of the cubic Klein-Gordon equations. We show the cubic Klein-Gordon equation converges to the cubic Schr\"odinger equation with a convergence rate of order $\epsilon...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Approximation Distillation of Quantum Coherence
量子相干性 近似蒸馏 相干资源理论
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2023/4/18
Coherence distillation is a basic information-theoretic task in the resource theory of coherence. In this talk, I will report the framework of the approximate coherence distillation under strictly inc...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：最优量子精密测量
量子精密测量 量子纠缠 传感器精度
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2023/4/18
量子精密测量是利用量子纠缠、相干等资源设计更精确参数测量方案的科学。量子精密测量可以使传感器精度超越传统极限，在引力波探测、原子钟校准、空间定位等一系列任务上取得突破，并为量子计算中的校准和噪声估计提供支持。为了在近期(10年内)量子设备上实现最优精密测量，需要一系列理论基础的支持。在报告中，将介绍我们在最优量子精密测量方向的最新成果：关于如何在量子技术有限制的情形下，确定量子精密测量任务的最大精...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Microphysical and non-thermal processes in the circumgalactic medium: turbulence, magnetic fields and cosmic rays
银河系 周介质 微物理 非热过程 湍流 磁场 宇宙射线
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2023/4/18
Multiphase gas structure is ubiquitous in our universe. Recent observations suggest that large quantities of cool (10^4 K) gas are detected in the circumgalactic medium (CGM) of galaxy halos, which ex...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Smooth sonic-supersonic flows in critical nozzles
关键喷嘴 声波-超音速 流动平稳
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2023/4/18
Nematic liquid crystals (NLCs) are anisotropic material intermediate that combine the fluidity of liquids with the orientational order of solids. NLCs are best known for their applications in the thri...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Finite-time singularity formations for the Landau-Lifshitz-Gilbert equation in dimension two
Landau–Lifshitz–Gilbert 二维 有限时间 奇点形成
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2023/4/19
Landau-Lifshitz-Gilbert equation (LLG) describes magnetization of ferromagnets. In this paper, we consider the singularity formation of LLG from R^2 to S^2. For any prescribed N distinct points q^{j} ...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Instanton Floer homology and Heegaard diagrams
瞬子 弗洛尔同调和 希加德图
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2023/4/21
Instanton Floer homology was introduced by Floer in 1980s and has become a power invariants for three manifolds and knots since then. It has lead to many milestone results, such as the approval of Pro...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：The Quantum Perron-Frobenius Theorem
量子力学 Perron-Frobenius Theorem 量子对称性
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2023/4/23
We establish the quantum Perron-Frobenius theorem on quantum symmtries. We characterize the structure of the Perron-Frobenius eigenvector space using quantum Fourier analysis (in the sense of picture ...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：量子算法及相关研究介绍
量子算法 量子纠缠 量子测不准关系
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2023/4/23
我们介绍近期在量子算法、量子纠缠及其物理实现、斜信息及量子测不准关系方面的有关研究工作。