Entanglement renormalization, quantum error correction, and bulk causality


Entanglement renormalization can be viewed as an encoding circuit for a family of approximate quantum error correcting codes. The logical information becomes progres-sively more well-protected against erasure errors at larger length scales. In particular, an approximate variant of holographic quantum error correcting code emerges at low energy for critical systems. This implies that two operators that are largely separated in scales behave as if they are spatially separated operators, in the sense that they obey a Lieb-Robinson type locality bound under a time evolution generated by a local Hamiltonian.

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Correspondence to Isaac H. Kim.

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ArXiv ePrint: 1701.00050

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Kim, I.H., Kastoryano, M.J. Entanglement renormalization, quantum error correction, and bulk causality. J. High Energ. Phys. 2017, 40 (2017). https://doi.org/10.1007/JHEP04(2017)040

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