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北美退伍军人节(Veterans Day),12 日无更新
arXiv 2003.06241hep-thmath-phmath.MP
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在边界上构建理论,其动力学和自由度

Constructing the theory at the boundary, its dynamics and degrees of freedom

Irais Rubalcava-Garcia

摘要:

给定一个由拉格朗日量定义的具有边界的时空区域中的理论,我们提出了一种在边界处(类空或类时)找到相应理论的方法,该方法使我们能够识别边界处的自由度,而无需任何规范固定或进一步的先验假设。我们从在边界上找到相应的作用原理开始。由此,我们可以找到相应的运动方程,边界上的对称性和自由度。然后,我们在边界处设置自由度。我们通过分析广泛研究的3维Abelian Chern-Simons理论来验证这种方法。我们发现,通过哈密顿框架,边界理论有一个自由度,其特征在于手征玻色子:量子霍尔边缘模式。我们还发现了一个规范固定在散装与边界条件之间的对应关系,并讨论这是否足以有一个适定的作用原理和可能的情况。

英文摘要:

Given a theory in a region of space-time with boundaries, defined by a Lagrangian, we propose a method to find the corresponding theory at the boundary (either space-like or time-like), that allows us to identify the degrees of freedom at the boundary without any gauge fixing nor further assumptions a priori. We start by finding the corresponding action principle at the boundary. From this, we can find the corresponding equations of motion, the symmetries and degrees of freedom at the boundary. Then we characterise the degrees of freedom at the boundary. We exemplify this method by analysing the broadly studied 3-dimensional Abelian Chern-Simons theory. We found, through the Hamiltonian framework, that the boundary theory has one degree of freedom that can be characterised by the chiral boson: the Quantum Hall edge modes. We also find a correspondence between a gauge fixing in the bulk with a boundary condition and discuss whether this is enough to have a well-posed action principle and the possible scenarios.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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