PIRSA:12120010

Local topological order inhibits thermal stability in 2D

(2012). Local topological order inhibits thermal stability in 2D. Perimeter Institute. https://pirsa.org/12120010

Local topological order inhibits thermal stability in 2D. Perimeter Institute, Dec. 05, 2012, https://pirsa.org/12120010 

          @misc{ pirsa_12120010,
            doi = {10.48660/12120010},
            url = {https://pirsa.org/12120010},
            author = {},
            keywords = {Quantum Information},
            language = {en},
            title = {Local topological order inhibits thermal stability in 2D},
            publisher = {Perimeter Institute},
            year = {2012},
            month = {dec},
            note = {PIRSA:12120010 see, \url{https://pirsa.org}}
          }
DOI 10.48660/12120010
Collection
Talk Type Scientific Series
Subject

Abstract

We study the robustness of quantum information stored in the degenerate ground space of a local, frustration-free Hamiltonian with commuting terms on a 2D spin lattice. On one hand, a macroscopic energy barrier separating the distinct ground states under local transformations would protect the information from thermal fluctuations. On the other hand, local topological order would shield the ground space from static perturbations. Here we demonstrate that local topological order implies a constant energy barrier, thus inhibiting thermal stability. Joint work with David Poulin. arXiv:1209.5750