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hep-th2019★ 32 cited
The negativity contour: a quasi-local measure of entanglement for mixed states
Jonah Kudler-Flam, Hassan Shapourian, Shinsei Ryu
In this paper, we study the entanglement structure of mixed states in quantum many-body systems using the , a local measure of entanglement that determ…
cond-mat.stat-mech2019★ 81 cited
Twisted and untwisted negativity spectrum of free fermions
Hassan Shapourian, Paola Ruggiero, Shinsei Ryu +1
A basic diagnostic of entanglement in mixed quantum states is known as the positive partial transpose (PT) criterion. Such criterion is based on the observation that the spectrum o…