QMHP: Entanglement and Coherence Decay in Nanosystems and Applications to Quantum Information Systems

纳米系统中的纠缠和相干衰减及其在量子信息系统中的应用目标和方法：纠缠是加密系统大量改进的核心，并有望成为一般量子信息系统，特别是量子计算的支柱。由于耶鲁大学和圣巴巴拉大学的研究小组正在进行实验的约瑟夫森系统阵列显示出巨大的希望，因此将对这项工作进行理论分析，使用精确的方法，与目前其他人使用的主方程不同。特别是，温度对大系统的影响将被强调，因为即使对于小系统，已经发现适度的温度可以引起解纠缠，并且这种影响在任何时候都是恒定的。智力优势：理解物理世界很大程度上依赖于量子力学。但是，关于其基础仍然存在许多问题。特别是，量子力学的核心是纠缠，但正如费曼等人所强调的那样，它的本质仍然是未知的。因此，将作出巨大的努力来更深入地了解它。更广泛的好处：具有讽刺意味的是，纠缠是一种工具，基本上在所有现代量子系统中使用，尽管人们对它知之甚少。因此，对其基本特征的更多了解应该对具有明确经济和社会影响的未来信息系统的设计产生重大影响。它的研究对研究生来说是一个非常有趣的吸引力和挑战，应该是课程讨论的一个很大的刺激。不仅是路易斯安那州立大学，还有南方大学（HBCU）也将尝试吸引学生的兴趣。

ENTANGLEMENT AND COHERENCE DECAY IN NANOSYSTEMS AND APPLICATIONS TOQUANTUM INFORMATION SYSTEMSObjectives and Approaches: Entanglement is at the heart of the vastimprovement in encryption systems and will hopefully provide the backboneof quantum information systems in general, particularly quantumcomputing.Since the Josephson System arrays, being pursued experimentallyby the Yale and Santa Barbara groups, show great promise, a theoreticalanalysis of this work will be carried out, using exact methods, as distinct from the master equations presently being used by others.In particular,the effect of temperature on large systems will be emphasized since,even for small systems, it has been found that moderate temperatures can cause disentanglement and that the effect is constant for all times.Intellectual Merit : Understanding the physical world relies heavily on Quantum Mechanics. But, many questions remain concerning its foundations. In particular, the heart of quantum mechanics is entanglement but, as emphasized by Feynman, among others, its nature essentially remains unknown .Thus, a strong effort will be made to understand it more deeply.Broader Benefits: Ironically, entanglement is a tool which is essentially used in all modern quantum systems, despite being poorly understood. Thus, greater knowledge of its fundamental characterestics should have significant impact on the design of future information systems with clear economic and social impact. Its study will present a very interesting attraction and challenge to graduate students and should be a great stimulus in course discussions. Attempts will also be made to interest students , not only at LSU, but also at Southern University (an HBCU).