When Are Zero Modes Necessary ?
نویسنده
چکیده
In this paper we develop a way to count zero momentum modes in front-form quantization and apply it to several such approaches: canonical light-cone quantization; Dirac light-cone quantization; reduced phase space quantization ; and Penrose quantization. We also examine which of these light-cone methods are consistent with the Atiyah-Singer index theorem.
منابع مشابه
Calculation of phononic and thermal properties of the CaB2 using the perturbation density functional theory (Research Article)
In this paper, the phononic structure and Enthalpy of CaB2 compound in simple hexagonal and orthorhombic phase have been investigated. The calculations were performed using the pseudo-potential method in the framework of the density functional theory and using the Quantum-Espresso code. Using the group theory and the characteristic table of the composition point group, the phonon modes were ide...
متن کاملصافیهای تنظیم‌پذیر M-کاناله بر پایه ساختارهای تیو- مورس نامتجانس حاوی شبه‌مواد
In this paper the tunable M-channel filters based on Thue-Morse heterostructures consisting of single -negative materials has been studied. The results showed that the number of resonance modes inside the zero- gap increases as the number of heterogenous interface, M, increases. The number of resonance modes inside the zero- gap is equal to that of heterogenous interface M, and it can be used a...
متن کاملTopological Majorana and Dirac zero modes in superconducting vortex cores.
We provide an argument based on flux insertion to show that certain superconductors with a nontrivial topological invariant have protected zero modes in their vortex cores. This argument has the flavor of a two-dimensional index theorem and applies to disordered systems as well. It also provides a new way of understanding the zero modes in the vortex cores of a spinless px+ipy superconductor. A...
متن کاملAdditional modes in a waveguide system of zero-index-metamaterials with defects
Zero-index-metamaterials (ZIM) have drawn much attention due to their intriguing properties and novel applications. Particularly, in a parallel plated ZIM waveguide system with defects, total reflection or transmission of wave can be achieved by adjusting the properties of defects. This effect has been explored extensively in different types of ZIM (e.g., epsilon-near-zero metamaterials, matche...
متن کاملComment on the Coupling of Zero Sound
Features in the zero sound attenuation near the pair-breaking edge in superfluid 3He-B have been observed in large magnetic fields. Schopohl and Tewordt [J. Low Temp. Phys. 57, 601 (1984)] claim that the J = 1−,M = ±1 order-parameter collective modes couple to zero sound as a result of the distortion of the equilibrium order parameter by a magnetic field; they identify the new features with the...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1995