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 ...
Hermitian perturbations on many-body localization. We focus on the interacting Hatano-Nelson model which breaks unitarityviaasymmetric hopping. We explore the phase diagram for the mid-spectrum eigenstates as a function of the interaction strength and the non-Hermiticity. In contrast to the non-...
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 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 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 ...
Many-body approach to non-Hermitian physics in fermionic systems In previous studies, the topological invariants of one-dimensional non-Hermitian systems have been defined in open boundary condition (OBC) to satisfy the bulk-boundary correspondence. The extreme sensitivity of bulk energy spectra to bo...
Non-Hermitian Rayleigh-Schroedinger Perturbation Theory We devise a non-Hermitian Rayleigh-Schroedinger perturbation theory for the single- and the multireference case to tackle both the many-body problem and th... C Buth,R Santra,LS Cederbaum - 《Physical Review A》 被引量: 32发表: 2004年 ...
Observation of non-Hermitian boundary induced hybrid skin-topological effect excited by synthetic complex frequencies Tianshu Jiang Chenyu Zhang C. T. Chan Nature Communications(2024) Collective non-Hermitian skin effect: point-gap topology and the doublon-holon excitations in non-reciprocal many-body sy...