Entanglement entropy from charge statistics: Exact relations for noninteracting many-body systems
Entanglement entropy from charge statistics: Exact relations for noninteracting many-body systems
We present exact formulas for the entanglement and R\'{e}nyi entropies generated at a quantum point contact (QPC) in terms of the statistics of charge fluctuations, which we illustrate with examples from both equilibrium and non-equilibrium transport. The formulas are also applicable to groundstate entanglement in systems described by non-interacting fermions …