Ground state Hermitians 2 Quantum entanglement 2 article Conformal field theories 1 Connected region 1 Effective Hamiltonian 1 Electron gas 1 Exceptional points 1 Fermi gas 1 Fermions 1 Function decays 1 Functional forms 1 Greens function 1 Hamiltonian operators 1 Hamiltonians 1 Low-energy spectrum 1 Many-body systems 1 Mathematical operators 1 Mixed state 1 Partial transpose 1 Power-law fashions 1 Pt symmetries 1 Quantum many-body systems 1 Quantum-critical point 1 Symmetrics 1 case report 1 clinical article 1 entropy 1 excitation 1