Quasisymmetry Groups and Many-Body Scar Dynamics
Quasisymmetry Groups and Many-Body Scar Dynamics
In quantum systems, a subspace spanned by degenerate eigenvectors of the Hamiltonian may have higher symmetries than those of the Hamiltonian itself. When this enhanced-symmetry group can be generated from local operators, we call it a quasi-symmetry group. When the group is a Lie group, an external field coupled to …