Twisted R'enyi Negativity as a Reliable Proxy for Mixed-State Entanglement in Fermionic Systems
The research investigates R´enyi negativity (RN) for mixed-state fermionic systems, focusing on a twisted variant as a proxy for logarithmic negativity (LN). It shows that the twisted RN adheres to physical laws like the area law and decreases with temperature, unlike its untwisted counterpart. This suggests twisted RNs are more reliable measures of entanglement in these complex systems.