In Hermitian models, several dynamical decoupling schemes have been suggested, in which the discrete-continuum interaction can be substantially reduced and even suppressed. In this work,we consider a discrete state interacting with a continuum via a time-dependent non-Hermitian coupling with finite (...
Non-Hermitian version of Dirac's interaction pictureComplete set of time-evolution equationsApplication in relativistic quantum mechanicsKlein-Gordon example with space-time-dependent massIn quantum mechanics the unitary evolution is most often described in a pre-selected Hilbert space ${\\cal H}^{(...
We theoretically demonstrate non-Hermitian indirect interaction between two magnetic impurities placed at the interface between a 3D topological insulator and a ferromagnetic metal. The coupling of topological insulator and the ferromagnet introduces not only Zeeman exchange field on the surface states but ...
Interface between Hermitian and non-Hermitian Hamiltonians in a model calculation We consider the interaction between the Hermitian world, represented by a real delta-function potential -\\alpha\\delta(x) -\\alpha\\delta(x) , and the non... Jones,F H. - 《Physical Review D Particles & Fi...
Interaction-induced decoherence in non-Hermitian quantum walks of ultracold Bosonscatalysishydrogenmaterials sciencesemiconductorssolar energyWe study the influence of particle interaction on a quantum walk on a bipartite one-dimensional lattice with decay from every second site. The corresponding non-...
(Pre-Talk) 27:44 The question of q, a look at the interplay of number theory and ergodic theory i 57:37 The value distribution of the Hurwitz zeta function with an irrational shift 51:58 Theta-finite pro-Hermitian vector bundles from loop groups elements 51:02 Torsion points and ...
题目:Quantum Non-Hermitian Phenomena with Open Baths | 北京大学量子材料科学中心 时间:2024-04-17 15:00 报告人:胡颖 山西大学 主办方:北京大学量子材料科学中心 直播链接:蔻享学术摘要:While enchanting non-Hermitian properties unattainable in Hermitian systems are widely revealed, genuine quantum non-Hermitia...
Non-Hermitian theory is a theoretical framework used to describe open systems. It offers a powerful tool in the characterization of both the intrinsic degrees of freedom of a system and the interactions with the external environment. The non-Hermitian framework consists of mathematical structures that...
'Weak measurements'—involving a weak unitary interaction between a quantum system and a meter followed by a projective measurement—are investigated when the system has a non-Hermitian Hamiltonian. We show in particular how the standard definition of the 'weak value' of an observable must be modi...
we demonstrate that the geometry-dependent non-Hermitian skin effect emerges in a ribbon geometry. Furthermore, skin modes localized at a boundary show a scale-free behavior that stems from the long-range interaction and whose mechanism goes beyond the framework of non-Bloch band theory. Our work...