Perturbation theory for two-dimensional hydrodynamic plasmons
نویسندگان
چکیده
منابع مشابه
Perturbation theory for weakly coupled two-dimensional layers
A key issue in two-dimensional structures composed of atom-thick sheets of electronic materials is the dependence of the properties of the combined system on the features of its parts. Here, we introduce a simple framework for the study of the electronic structure of commensurate and incommensurate layered assemblies based on perturbation theory. Within this framework, we calculate the band str...
متن کاملPerturbation theory in two-dimensional open string field theory.
In this paper we develop the covariant string field theory approach to open 2d strings. Upon constructing the vertices, we apply the formalism to calculate the lowest order contributions to the 4-and 5-point tachyon–tachyon tree amplitudes. Our results are shown to match the 'bulk' amplitude calculations of Bershadsky and Kutasov. In the present approach the pole structure of the amplitudes bec...
متن کاملDimensional perturbation theory for Regge poles
We apply dimensional perturbation theory to the calculation of Regge pole positions, providing a systematic improvement to earlier analytic first-order results. We consider the orbital angular momentum l as a function of spatial dimension D for a given energy E , and expand l in inverse powers of k[(D21)/2. It is demonstrated for both bound and resonance states that the resulting perturbation s...
متن کاملTheory of Plasmons for Two-Dimensional Materials in the Random Phase Approximation
Abstract: A theory is derived for plasmons in two-dimensional (2D) materials by using three-dimensional (3D) plasmon theory, which was reported previously in the random phase approximation under high frequency conditions. When the 3D local electron density is expressed by the 2D local electron density n2D multiplied by the delta function in the thickness direction, a self-consistent integral eq...
متن کاملDimensional continuation without perturbation theory
A formula is proposed for continuing physical correlation functions to non-integer numbers of dimensions, expressing them as infinite weighted sums over the same correlation functions in arbitrary integer dimensions. The formula is motivated by studying the strong coupling expansion, but the end result makes no reference to any perturbation theory. It is shown that the formula leads to the corr...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2019
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.99.195437