Quantum Alchemy and Universal Orthogonality Catastrophe in One-Dimensional Anyons

Abstract

Many-particle quantum systems with intermediate anyonic exchange statistics are supported in one spatial dimension. In this context, the anyon-anyon mapping is recast as a continuous transformation that generates shifts of the statistical parameter κ. We characterize the geometry of quantum states associated with different values of κ, i.e., different quantum statistics. While states in the bosonic and fermionic subspaces are always orthogonal, overlaps between anyonic states are generally finite and exhibit a universal form of the orthogonality catastrophe governed by a fundamental statistical factor, independent of the microscopic Hamiltonian. We characterize this decay using quantum speed limits on the flow of κ, illustrate our results with a model of hard-core anyons, and discuss possible experiments in quantum simulation.