Entanglement distillation toward minimal bond cut surface in tensor networks

In tensor networks, a geometric operation of pushing a bond cut surface toward a minimal surface corresponds to entanglement distillation. Cutting bonds defines a reduced transition matrix on the bond cut surface and the associated quantum state naturally emerges from it. We justify this picture quantitatively by evaluating the trace distance between the maximally entangled states and the states on bond cut surfaces in the multiscale entanglement renormalization ansatz (MERA) and matrix product states in a canonical form. Our numerical result for the random MERA is in a reasonable agreement with our proposal. The result sheds new light on a deeper understanding of the Ryu-Takayanagi formula for entanglement entropy in holography and the emergence of geometry from the entanglement structure.

Automated summary

In tensor networks, the geometric operation of pushing bond cut surfaces towards minimal surfaces corresponds to entanglement distillation, with quantitative validation through evaluating trace distance between states. Numerical results show reasonable agreement, shedding new light on understanding Ryu-Takayanagi formula and emergence of geometry from entanglement structure in quantum gravity.