Here, by demonstrating a parity–time-symmetric topological insulator, we show that topological transport exists beyond these constraints. Implemented on a photonic platform, our non-Hermitian topological system harnesses the complex interplay between a discrete coupling protocol and judiciously placed losses...
Topological insulatorsParity鈥搕ime (PT)-symmetric crystals are a class of non-Hermitian systems that allow, for example, the existence of modes with real propagation constants, for self-orthogonality of propagating modes, and for uni-directional invisibility at defects. Photonic PT-symmetric systems ...
Dynamic encircling of an anti-parity-time (anti-PT) symmetric exceptional point (EP) leads to chiral transfer of symmetry-broken modes, which has been explored in various systems except acoustics. In this work, acoustic counterpart of this behavior is numerically demonstrated in coupled waveguide sy...
Single-mode laser by parity–time symmetry breaking. Science 346, 972–975 (2014). Article ADS Google Scholar Lin, Z. et al. Unidirectional invisibility induced by PT-symmetric periodic structures. Phys. Rev. Lett. 106, 213901 (2011). Article ADS Google Scholar Longhi, S. PT-symmetric ...
The parity conservation of θ and τ only allows each of them respond to external forces as an independent whole, is not whether the θ and τ is symmetric. In high dimensional space-time, the interaction of different symmetries is very complex, which may form various forms of defects. It ...
It appears that the magnitude of the expected asymmetry can be estimated on the basis of topological considerations alone, and that the effect may be amenable to observation in the existing and/or future heavy ion experiments. Let us begin with a brief introduction to the strong CP problem. ...
(82) Notice that the equations above are symmetric in the three momenta, but for technical reasons we prefer to express them only in terms of p1 and p2. Note that, if we contract the correlator with multiple momenta at the same time, the result is zero. We can then decompose the ...
Parity-timesymmetryDynamicquantumphasetransitionsPhotonicskyrmionsThe study of non-Hermitian systems with parity-time(PT) symmetry is a rapidly developing frontier in recent years. Experimentally, PT-symmetric systems have been realized in classical optics by balancing gain and loss, which holds great ...
Topology in quench dynamics gives rise to intriguing dynamic topological phenomena, which are intimately connected to the topology of static Hamiltonians yet challenging to probe experimentally. Here we experimentally detect momentum-time skyrmions in parity-time (PT)-symmetric non-unitary quench dynamics...
The study of non-Hermitian systems with parity–time (PT) symmetry is a rapidly developing frontier. Realized in recent experiments, PT-symmetric classical optical systems with balanced gain and loss hold great promise for future applications. Here we re