Real space circuit complexity as a probe of phase diagrams
arXiv:2211.14106 · doi:10.1103/PhysRevB.107.075122
Abstract
Circuit complexity has been used as a tool to study various properties in condensed matter systems, in particular as a way to probe the phase diagram. However, compared with measures based on entanglement, complexity has been found lacking. We show that when imposing penalty factors punishing non-locality, it becomes a much stronger probe of the phase diagram, able to probe more subtle features. We do this by deriving analytical solutions for the complexity in the XY chain with transverse field.
4 pages+appendix; v2: updated author name
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