2017

Time Evolution of Complexity in Abelian Gauge Theories - And Playing Quantum Othello Game -

Hashimoto, Koji, Iizuka, Norihiro, Sugishita, Sotaro

Understand

Quantum complexity is conjectured to probe inside of black hole horizons (or wormhole) via gauge gravity correspondence.

  • In order to have a better understanding of this correspondence, we study time evolutions of complexities for generic Abelian pure gauge theories.
  • For this purpose, we discretize $U(1)$ gauge group as $\mathbf{Z}_N$ and also continuum spacetime as lattice spacetime, and this enables us to define a universal gate set for these gauge theories, and evaluate time evolutions of the complexities explicitly.
  • We find that for a generic class of diagonal Hamiltonians to achieve a large complexity $\sim \exp(\mbox{entropy})$, which is one of the conjectured criteria necessary to have a dual black hole, the Abelian gauge theory needs to be maximally nonlocal.

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