We develop the perturbation theory of the fidelity susceptibility in biorthogonal bases for arbitrary interacting non-Hermitian many-body systems with real eigenvalues. The quantum criticality in the non-Hermitian transverse field Ising chain is investigated by the second derivative of the ground-state ...
The non-Hermitian Hamiltonian is considered to be relevant to cold atoms with dissipation. We conclude the emergence of the non-Hermitian FQH state by the presence of the topological degeneracy and by the many-body Chern number for the ground state multiplet showing Ctot = 1. The robust ...
Non-Hermitian effects of the intrinsic signs in topologically ordered wavefunctionsWAVE functionsTOPOLOGYPHASE diagramsAUTHORSPHASE transitionsNegative signs in many-body wavefunctions play an important role in quantum mechanics. The ground-state wavefunction of double semion model on a two-dimensional ...
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...
A biorthonormal-block density-matrix renormalization group algorithm is proposed to compute properties of non-Hermitian many-body systems, in which a renormalized-space partition to the non-Hermitian reduced density matrix is implemented to fulfill the prerequisite for the biorthonormality of the renorma...
Non-Hermitian Parent Hamiltonian and Composite Quantum Phases | 青年科学半月谈 开始时间 2023-04-27 10:00 题目:Non-Hermitian Parent Hamiltonian and Composite Quantum Phases | 青年科学半月谈 时间:2023年4月27日(周四)10:00 报告人:Yuchen Guo Abstract: In this talk, I plan to introduce our two ...
More recent formal developments, concerning incomplete model space and hermitian effective hamiltonian, are also mentioned. Various approximate schemes currently in use for relativistic many-body calculations are discussed and analysed from the point of QED. The “no-virtual-pair approximation”, which ...
Spin–orbit coupling is an essential mechanism underlying quantum phenomena such as the spin Hall effect and topological insulators1. It has been widely studied in well-isolated Hermitian systems, but much less is known about the role dissipation plays i
Floquet topological phases of non-Hermitian systems The non-Hermiticity caused breakdown of the bulk-boundary correspondence (BBC) in topological phase transition was cured by the skin effect for the systems... Hong,Jun-Hong 被引量: 0发表: 0年 Topological phases of many-body non-Hermitian ...
The non-Hermitian many-body topological modes are realized in a quantum dot chain by utilizing a gate-tunable modulation of dissipation, and they emerge purely because of the non-Hermiticity. The schematic illustration of the tunable non-Hermitian quantum dot chain is shown in Figure 7(f). It...