Hunting for the non-Hermitian exceptional points with fidelity susceptibility
Yu-Chin Tzeng, Chia-Yi Ju, Guang-Yin Chen, Wen-Min Huang
Abstract
The authors generalize the fidelity to the non-Hermitian quantum mechanics using the metric tensor of the Hilbert space, and detect the quantum critical point and the exceptional point using fidelity susceptibility.
Topics & Concepts
FidelityPoint (geometry)Metric (unit)Computer scienceTensor (intrinsic definition)MathematicsQuantumTheoretical physicsHilbert spaceHigh fidelityAlgorithmPhysicsPerspective (graphical)Calculus (dental)Scheme (mathematics)Artificial intelligenceCritical point (mathematics)Quantum Mechanics and Non-Hermitian PhysicsQuantum many-body systemsQuantum chaos and dynamical systems