一种非局域量子引力玩具模型
发布时间:2023-02-06 15:49
非局域量子引力模型是量子引力的有力候选者。本文将构建一类非局域标量场理论作为量子引力的玩具模型,这类标量场在早些时候被证明是幺正的。在本文中,我们将首先介绍构建非局域场理论的意义和非局域量子引力的历史。我们会介绍用于计算局域化量子场对应的散射振幅的方法,以及把这种方法推广到非局域场时遇到的困难。我们将进一步介绍如何通过解析延拓的方法把定义在欧氏空间的散射振幅转到闵氏空间。在费曼图的计算中,我们首先计算欧氏空间中三种带有不同非局域形状因子散射振幅的单圈图,以及带有其中一种形状因子振幅的两圈图。然后,我们计算通过解析延拓的方法得到的外能量为实数的闵式空间中的散射振幅。这种解析延拓的方法将会被应用在其中两个形状因子的单圈振幅中。通过这种解析延拓的方法,我们可以进一步验证非局域标量场散射振幅的有限性和幺正性。
【文章页数】:63 页
【学位级别】:硕士
【文章目录】:
摘要
Abstract
Chapter 1 Introduction
1.1 Research Background and Significance
1.2 Literature Review and Analysis
Chapter 2 Nonlocal Gravity
2.1 Motivations of Nonlocal Gravity
2.2 Nonlocality
2.3 Summary
Chapter 3 From Local to Nonlocal
3.1 Local Scalar Field Theory
3.2 Problem of Wick Rotation in Nonlocal Cases
3.3 Summary
Chapter 4 Scattering Amplitudes in Euclidean Space
4.1 Schwinger Representation
4.2 Scattering Amplitudes at One-loop Level
4.2.1 Spallucci Form Factor
4.2.2 Form Factor e(?)
4.2.3 Tomboulis Form Factor
4.3 Scattering Amplitudes at Tow-loop Level
4.4 Summary
Chapter 5 Scattering Amplitudes in Minkowski Space with Real ExternalEnergies
5.1 Analytic Continuation
5.2 Spallucci Form Factor
5.3 Form Factor e(?)
5.4 Summary
Conclusions
结论
References
Acknowledgements
本文编号:3736185
【文章页数】:63 页
【学位级别】:硕士
【文章目录】:
摘要
Abstract
Chapter 1 Introduction
1.1 Research Background and Significance
1.2 Literature Review and Analysis
Chapter 2 Nonlocal Gravity
2.1 Motivations of Nonlocal Gravity
2.2 Nonlocality
2.3 Summary
Chapter 3 From Local to Nonlocal
3.1 Local Scalar Field Theory
3.2 Problem of Wick Rotation in Nonlocal Cases
3.3 Summary
Chapter 4 Scattering Amplitudes in Euclidean Space
4.1 Schwinger Representation
4.2 Scattering Amplitudes at One-loop Level
4.2.1 Spallucci Form Factor
4.2.2 Form Factor e(?)
4.2.3 Tomboulis Form Factor
4.3 Scattering Amplitudes at Tow-loop Level
4.4 Summary
Chapter 5 Scattering Amplitudes in Minkowski Space with Real ExternalEnergies
5.1 Analytic Continuation
5.2 Spallucci Form Factor
5.3 Form Factor e(?)
5.4 Summary
Conclusions
结论
References
Acknowledgements
本文编号:3736185
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