Parent Hamiltonian and intrinsic phase transition in non-Hermitian photonic systems
The work experimentally created non-Hermitian parent Hamiltonians (NH-PHs) using single photons to build systems with tunable properties. By designing these Hamiltonians from matrix product states, researchers successfully reproduced target ground states and observed a non-Hermitian phase transition in an N=3 model, confirming a controllable platform for exploring complex non-Hermitian physics.