为了体现一些本质特征,学者提出了散射模型来描述这一类共振腔体系,即将共振腔单纯看作传播模式的一个“操作”,即用散射矩阵描述,相应的物理量也用散射矩阵元来描述。 参考:Phys. Rev. A 84, 063833 (2011) - Quantum noise and mode nonorthogonality in non-Hermitian $\mathcal{PT}$-symmetric optical ...
① μ>γ,PT对称相(PT symmetric phase),两个实数本征值。 ② μ<γ,PT破缺相(PT broken phase),一对复共轭本征值, 分别对应非平衡系统中指数放大和指数衰减的本征态。 ③ \mu=\gamma ,奇异点,PT对称两种相态的分界点,两个本征值简并。 3. 什么是非厄米光学? ※ 封闭系统只是一种理想情况,现实中难...
代表性创新成果 1.X. Q. Bai, R. C. Yang, et al. Dynamics and manipulation of Airy beam in fractional system with diffraction modulation and PT-symmetric potential .Nonlinear Dynamics, 111:4577–4591 (2023). 2.X...
encircling the exceptional point (EP) in a PT symmetric system for asymmetric mode switching has caught people’s eyes because of its potential in the design of chiral devices. In photonic systems, the dynamical variation o...
New examples of (2 脳 2)-matrix quasi-exactly solvable operators are constructed with the emphasis set on PT-symmetric Hamiltonians.Yves BrihayeAncilla NininahazweBhabani PrasadJournal of Physics: A Mathematical & TheoreticalBrihaye, Y., Nininahazwe, A. and Prasad Mandal, B. (2007) PT-...
Here we propose a microscopic mechanism leading to the-symmetric effective model in the context of the nonequilibrium Mott transition in a dissipative Hubbard chain. Our model comprises a half-filled fermionic Hubbard chain subject to a constant electric field. The dissipation is introduced via the ...
Physicists are always riveted in predicting how a physical system behaves as a function of time. We begin this review article by understanding various formalisms to study the dynamics of the systems. The once-accepted belief that the Hamiltonian had to be Hermitian to ensure real eigenvalues got...
We designed a device based on the symmetric structure of Pt/CoNiCo/Pt to investigate the current switching of CoNiCo magnets by spin Hall effect from the bottom Pt layer. After excluding the thermal effect contribution, the spin Hall effect generates a damping-like effective field from the critic...
The C operator in PT-symmetric quantum mechanics satisfies a system of three simultaneous algebraic operator equations, $C^2=1$, $[C,PT]=0$, and $[C,H]=0$. These equations are difficult to solve exactly, so perturbative methods have been used in the past to calculate C. The usual ...
参考:Phys. Rev. A 82, 043803 (2010) - Unidirectional nonlinear $\mathcal{PT}$-symmetric optical structures (aps.org) 一. 非线性PT对称二体模型 我们考虑一对耦合波导,加入Kerr非线性项,在适当单位下很易写出耦合波方程 \begin{cases} i\dfrac{\mathrm d\psi_1}{\mathrm dz}+\psi_2-i\gamma\ps...