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Chinese Physics C

单核子在具有八形变的平均势场中的混沌运动（II）初始相干 …

Fang Liu, 李君清

Published Jan 1, 2000• 0 citations
OpenAlex

Abstract

研究了二维不对称谐振子的相干态在附加八极形变势作用下的播时，量子正则变量的期望值和测不准度的变化，发现量子混沌与相应的经典混沌完全对应地表现了多种性质，量子混沌的特征也势能面的几何对称性，即势能面上负曲率的存在及负曲率的大小有关系。

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研究了二维不对称谐振子的相干态在附加八极形变势作用下的播时，量子正则变量的期望值和测不准度的变化，发现量子混沌与相应的经典混沌完全对应地表现了多种性质，量子混沌的特征也势能面的几何对称性，即势能面上负曲率的存在及负曲率的大小有关系。
The intensity changes of all the important spontaneous emissions of Kr I and Kr II in visible region are examined, when the 5682Å laser transition (5p 4 D 5/2 →5s 2 P 3/2 ) in Kr II is interrupted by a rotating chopper. The strong positive cross-modulations are observed in the lines which start from 5p 4 D 5/2 state of Kr II. The cross-modulations of the lines which end on 5 s 2 P 3/2 state of Kr II are not so strong. But certain degree of cross-modulations are observed in some of the lines of Kr II which have no direct connection to the laser states. No cross-modulation is observed in the Kr I lines.
量子导引是量子世界中的一种重要资源，代表了一种介于量子纠缠和贝尔非局域性之间的非经典关联，具有独特的非对称性，在基础物理和应用科学方面均具有重要的研究价值。本文主要对量子导引的基本性质、发展现状，以及未来发展趋势进行了详细的介绍和总结。通过对不同自由度的离散、连续变量量子导引的介绍，揭示其所包含的丰富物理内涵；通过对高维量子导引特性的讨论，展示了其在抗噪声方面的优异性能；通过对量子导引在量子网络、单边设备无关量子密钥分发、量子随机数和量子通信等方向的应用介绍，展现了其在未来量子产业发展方面的巨大潜力。随着量子科技的进步以及人工智能等跨学科方法的引入，量子导引有望在推进量子信息技术的发展和产业落地等方面发挥出重要作用。
An anonymous identity based encryption (anonymous IBE) scheme requires that an adversary can not determine the identity of the recipient from a ciphertext encrypted by the corresponding public key. The anonymity was formalized in previous works [1], [13], and this can be considered under chosen plaintext attack and adaptive chosen ciphertext attack, yielding two notions of security, ID-II-CPA and ID-II-CCA, where II denotes “indistinguishability of identities.” However, how to obtain an ID-II-CCA secure anonymous IBE in the random oracle model is still a challenging problem. We firstly propose a new notion of plaintext awareness in the two identities setting, called PATI. Secondly, we prove that the IBE scheme is ID-II-CCA secure if it is PATI secure. Finally, we propose the first generic conversion for anonymous IBE from ID-II-CPA to ID-II-CCA in the random oracle model.