Non-Hermitian topological systems with eigenvalues that are always real

• المؤلفون الرئيسيون: Long, Yang, Xue, Haoran, Zhang, Baile
• مؤلفون آخرون: School of Physical and Mathematical Sciences
• التنسيق: مقال
• اللغة: English
• منشور في: 2022
• الموضوعات: Science::Physics; Science::Physics::Atomic physics::Solid state physics; Topology; Hermitians
• الوصول للمادة أونلاين: https://hdl.handle.net/10356/156861

The effect of non-Hermiticity in band topology has sparked many discussions on non-Hermitian topological physics. It has long been known that non-Hermitian Hamiltonians can exhibit real energy spectra under the condition of parity-time (PT) symmetry - commonly implemented with balanced loss and gain...