arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1902.01995quant-phcond-mat.mtrl-scimath-phmath.MP
收藏

各向异性二维Dirac材料的Barut-Girardello相干态

Barut-Girardello coherent states for anisotropic 2D-Dirac materials

Erik Díaz-Bautista, Yajaira Concha-Sánchez, Alfredo Raya

摘要:

我们构造了各向异性二维Dirac材料中载流子的Barut-Girardello相干态,该材料浸没在与样品表面正交的恒定均匀磁场中。为此,我们解决各向异性狄拉克方程,并确定适当的上升和下降运营商。在类朗道规范中,我们构造了一个广义湮没算符的本征态,它的本征值依赖于该算符的任意函数$f$.为了描述各向异性效应对这些态的影响,我们得到了三种不同函数$f$的海森堡测不准关系、几率密度、平均能量值和占据数分布。对于由单轴应变引起的各向异性的情况下,我们得到,当沿材料表面的$x$轴施加应力时,非线性相干态的概率密度小于沿正交轴施加应力时的概率密度。

英文摘要:

We construct the Barut-Girardello coherent states for charge carriers in anisotropic 2D-Dirac materials immersed in a constant homogeneous magnetic field which is orthogonal to the sample surface. For that purpose, we solve the anisotropic Dirac equation and identify the appropriate arising and lowering operators. Working in a Landau-like gauge, we explicitly construct nonlinear coherent states as eigenstates of a generalized annihilation operator with complex eigenvalues which depends on an arbitrary function $f$ of the number operator. In order to describe the anisotropy effects on these states, we obtain the Heisenberg uncertainty relation, the probability density, mean energy value and occupation number distribution for three different functions $f$. For the case in which the anisotropy is caused by uniaxial strain, we obtain that when a stress is applied along the $x$-axis of the material surface, the probability density for the nonlinear coherent states is smaller compared to when the material is stressed along the orthogonal axis.

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。

↑