Energy spectra of a spin-? XY spin molecule interacting with a single mode field cavity: Numerical study

INERA Conference: Vapor Phase Technologies for Metal Oxide and Carbon Nanostructures

物理学;材料科学

Tonchev, H.^1 ; Donkov, A.A.^1 ; Chamati, H.^1

Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussée, Sofia

1784, Bulgaria^1

关键词: Arbitrary spin;    Invariant operators;    Long range interactions;    Nearest neighbour;    Physical parameters;    Single-mode field;    Spin 1/2 XY chain;    Strong dependences;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/764/1/012017/pdf
DOI  :  10.1088/1742-6596/764/1/012017

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In a previous paper [J.Phys.: Conf. Ser. 682 (2016) 012032] we studied analytically the energy spectra of a finite-size spin 1/2 XY chain (molecule) coupled at an arbitrary spin site to a single mode of an electromagnetic field via the Jaynes-Cummings model. We considered spin rings and open spin molecules with up to 4 spins and an interaction restricted to nearest-neighbours. Here we extend our investigation, addressing numerically the energy spectra of molecules of up to 10 spins with nearest-neighbour or long- range interaction. Furthermore we analyze the behaviour of an invariant operator, constructed by combining the magnetization of the spin-chain and the total number of photons in the system. We found a strong dependence on the number (even or odd) of sites in the molecules. This study is aimed at finding the appropriate combination of the physical parameters that could make the system suitable for use in quantum computations.