Multi wavefunction overlap and multi entropy for topological ground
states in (2+1) dimensions
Multi wavefunction overlap and multi entropy for topological ground
states in (2+1) dimensions
Multi-wavefunction overlaps -- generalizations of the quantum mechanical inner product for more than two quantum many-body states -- are valuable tools for studying many-body physics. In this paper, we investigate the multi-wavefunction overlap of (2+1)-dimensional gapped ground states, focusing particularly on symmetry-protected topological (SPT) states. We demonstrate how these overlaps …