Zobrazeno 1 - 10
of 175
pro vyhledávání: '"Ma, Guancong"'
Non-Hermitian effects have emerged as a new paradigm for the manipulation of phases of matter that profoundly changes our understanding of non-equilibrium systems, introducing novel concepts such as exceptional points and spectral topology, as well a
Externí odkaz:
http://arxiv.org/abs/2312.07564
Publikováno v:
Nature Communications (2024)
Sound in indoor spaces forms a complex wavefield due to multiple scattering encountered by the sound. Indoor acoustic communication involving multiple sources and receivers thus inevitably suffers from cross-talks. Here, we demonstrate the isolation
Externí odkaz:
http://arxiv.org/abs/2308.01531
There has been a recent surge of interest in using light and sound as platforms for studying non-Abelian physics. Through a kaleidoscope of physical effects, light and sound provide diverse ways to manipulate their degrees of freedom to constitute th
Externí odkaz:
http://arxiv.org/abs/2305.12206
Autor:
Wang, Dongyi, Deng, Yuanchen, Oudich, Mourad, Benalcazar, Wladimir A., Ma, Guancong, Jing, Yun
Higher-order topological band theory has transformed the landscape of topological phases in quantum and classical systems. Here, we experimentally demonstrate a two-dimensional (2D) higher-order topological phase (HOTP), referred to as the multiple c
Externí odkaz:
http://arxiv.org/abs/2305.08313
Lines of exceptional points are robust in the 3-dimensional non-Hermitian parameter space without requiring any symmetry. However, when more elaborate exceptional structures are considered, the role of symmetry becomes critical. One such case is the
Externí odkaz:
http://arxiv.org/abs/2304.10347
Publikováno v:
Phys. Rev. Lett. 131, 207201 (2023)
Recent studies of non-Hermitian periodic lattices unveiled the non-Hermitian skin effect (NHSE), in which the bulk modes under the periodic boundary conditions (PBC) become skin modes under open boundary conditions (OBC). The NHSE is a topological ef
Externí odkaz:
http://arxiv.org/abs/2302.06314
Publikováno v:
Nature Communications 14, 6660 (2023)
As the counterpart of Hermitian nodal structures, the geometry formed by exceptional points (EPs), such as exceptional lines (ELs), entails intriguing spectral topology. We report the experimental realization of order-3 exceptional lines (EL3) that a
Externí odkaz:
http://arxiv.org/abs/2211.15921
Publikováno v:
Physical Review Research 5, 023038 (2023)
The spectrum of a non-Hermitian system generically forms a two-dimensional complex Riemannian manifold with distinct topology from the underlying parameter space. Spectral topology permits parametric loops to map the affiliated eigenvalue trajectorie
Externí odkaz:
http://arxiv.org/abs/2211.13906
Publikováno v:
Nature Reviews Physics (2022)
Non-Hermitian theory is a theoretical framework that excels at describing open systems. It offers a powerful tool in the characterization of both the intrinsic degrees of freedom (DOFs) of a system and the interactions with the external environment.
Externí odkaz:
http://arxiv.org/abs/2204.11601
Topological modes (TMs) are usually localized at defects or boundaries of a much larger topological lattice. Recent studies of non-Hermitian band theories unveiled the non-Hermitian skin effect (NHSE), by which the bulk states collapse to the boundar
Externí odkaz:
http://arxiv.org/abs/2203.02147