目录 收起 1. PT symmetry & 双正交基 2. Non-hermitian SSH model 2.1 广义BZ 2.2 零能模的不一致性 2.3 Winding number Appendix: 对'Non-Hermitian skin effect'这个词早有耳闻,Non-Hermitian physics也一直很火,遂抽空对Non-Hermitian的体系做一个简单的了解。
We investigate a non- Hermitian finite-size Kitaev chain with PT-symmetric chemical potentials. Exact solution at the symmetric point shows that Majorana edge modes can emerge as the coalescing states at exceptional points and PT symmetry breaking states. The coalescing zero mode is the finite-size...
PT-symmetric systems can have a real spectrum even when their Hamiltonian is non-hermitian, but develop a complex spectrum when the degree of non-hermiticity increases. Here we utilize random-matrix theory to show that this spontaneous PT-symmetry breaking can occur via two distinct mechanisms, ...
45Altmetric Metrics Abstract In recent years, notions drawn from non-Hermitian physics and parity–time (PT) symmetry have attracted considerable attention. In particular, the realization that the interplay between gain and loss can lead to entirely new and unexpected features has initiated an intense...
SaxonPotential;PT-symmetry,Non-Hermitianpotential;Nikiforov-Uvarov Method. PACSNUMBER(S):03.65.-w;02.30.Gp;03.65.Ge;68.49.-h;24.10.Ht; 03.65.Db;12.39.Pn;71.15.Dx;02.30.Fn I.INTRODUCTION Alargevarietyofpotentialswiththerealorcomplexformareencounteredinvarious fieldsofphysics.Aconsistentphysicaltheor...
It has been found that in the photonic graphene, PT-symmetric potentials make the Fermi velocity larger than the speed of light [61], followed by occurrence of PT-symmetry broken. The notable phenomenon is that PT symmetry can be restored by deforming the geometry of the photonic graphene, ...
PT-Symmetry, Pseudo-Hermiticity: the Real Spectra of Non-Hermitian Hamiltonians PT-symmetry gives rise to a new class of complex Hamiltonians with real spectrum. The pseudo-Hermeticity of Hamiltonians are discussed and PT-symmetric Ham... S Meyur,S Debnath - 《Acta Physica Polonica》 被引量:...
can naturally handle the manipulation of beam-like wave objects in the presence of loss and gain. This approach can also be applied to the manipulation of leaky waves. Remarkable wave-confinement and wave-guiding phenomena can occur in bilayers satisfying thePT-symmetry condition in the epsilon-ne...
H. Theory of coupled optical PT-symmetric structures. Opt. Lett. 32, 2632–2634 (2007). Article ADS MATH Google Scholar Guo, A. et al. Observation of \(\mathcal{P}\mathcal{T}\)-symmetry breaking in complex optical potentials. Phys. Rev. Lett. 103, 093902 (2009). Article ADS ...
We investigate the concept of the pseudo-parity–time (pseudo- {PT} ) symmetry in periodic quantum systems. This pseudo parity–time symmetry manifests itself dynamically in the framework of the non-unitary evolution (Floquet) operator U ( τ ) = e i L τ , over a period τ , which sh...