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 ...
We revisit the fate of the skin modes in many-body non-Hermitian fermionic systems. Contrary to the single-particle case, the many-body ground state cannot exhibit an exponential localization of all eigenstates due to the Pauli exclusion principle. However, asymmetry can still exist in the densi...
The non-Hermitian disorder due to random fluctuations of loss and gain can be a source of novel-type localized states44,45,46. Another interesting direction is the effects of asymmetric hopping on many-body localization predicted for dynamics of the quantum particles44,47. Such effects can have...
【直播】【 青年科学半月谈】Quantum many-body scars meet non-Hermitian physicskoushare 德国奥格斯堡大学 文学硕士题目:Quantum many-body scars meet non-Hermitian physics 报告人:王鹤然 时间:2023年10月19日(周四)10:00 主办方:蔻享学术 直播链接:蔻享--共享科学、传播科学发布...
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...
Quantum phase transitions occur in non-Hermitian systems. In this work we show that density functional theory, for the first time, uncovers universal critical behaviors for quantum phase transitions and quantum entanglement in non-Hermitian many-body systems. To be specific, we first prove that the...
Many-body theoryCooperative phenomena in quantum optical systemsThe intrinsic dynamics of a system with open decay channels is described by an effective non-Hermitian Hamiltonian which at the same time allows one to find the external dynamics, - reaction cross sections. We discuss ways of ...
Non-Hermitian effects of the intrinsic signs in topologically ordered wavefunctionsNegative signs in many-body wavefunctions play an important role in quantum mechanics. The ground-state wavefunction of double semion model on a two-dimensional hexagonal lattice contains an intrinsic sign which cannot ...
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...
The study of entanglement in the symmetry sectors of a theory has recently attracted a lot of attention since it provides better understanding of some aspects of quantum many-body systems. In this paper, we extend this analysis to the case of non-Hermitian models, in which the reduced density...