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Open AccessJournal ArticleDOI

Holographic Complexity Equals Bulk Action

TLDR
The hypothesis that black holes are the fastest computers in nature is discussed and the conjecture that the quantum complexity of a holographic state is dual to the action of a certain spacetime region that is called a Wheeler-DeWitt patch is illustrated.
Abstract
We conjecture that the quantum complexity of a holographic state is dual to the action of a certain spacetime region that we call a Wheeler-DeWitt patch. We illustrate and test the conjecture in the context of neutral, charged, and rotating black holes in anti-de Sitter spacetime, as well as black holes perturbed with static shells and with shock waves. This conjecture evolved from a previous conjecture that complexity is dual to spatial volume, but appears to be a major improvement over the original. In light of our results, we discuss the hypothesis that black holes are the fastest computers in nature.

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Citations
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Time dependence of complexity for Lovelock black holes

TL;DR: In this paper, the authors studied the general time dependence of complexity for holographic states dual to Lovelock black holes using the ''complexity equals action'' proposal, and they found that the critical time at which the complexity begins to increase is a decreasing function of the higher order coupling constants, which implies that the complexity evolves faster than that of Schwarzschild black holes.
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Sewing spacetime with Lorentzian threads: complexity and the emergence of time in quantum gravity

TL;DR: In this article, the authors consider the Lorentzian analog to reformulate the complexity-volume conjecture using Lorentzi flows, which are timelike vector fields whose minimum flux through a boundary subregion is equal to the volume of the homologous maximal bulk Cauchy slice.
Posted Content

Complexity and Newton's Laws

TL;DR: In this paper, an improved version of the size-momentum correspondence was presented and it was shown that Newton's laws of motion are a consequence of the tendency for complexity to increase.
Journal ArticleDOI

On complexity of Jackiw–Teitelboim gravity

TL;DR: In this article, the complexity of a UV cutoff is computed for the case where the corresponding JT gravity is obtained by dimensional reduction from higher dimensional gravities, and the complexity exhibits the late time linear growth.
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Holographic study of entanglement and complexity for mixed states

TL;DR: In this paper, the authors considered a nonrelativistic strongly coupled theory with hidden Fermi surfaces, which is a hyperscaling-violating solution, characterized by two parameters, hyperscales violating exponent $\ensuremath{\theta}$ and dynamical exponent $z$.
References
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Journal ArticleDOI

The world as a hologram

TL;DR: In this article, the effects of particle growth with momentum on information spreading near black hole horizons were investigated. But the authors only considered the earliest times of the propagation of information near the horizon.
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A bound on chaos

TL;DR: In this paper, a sharp bound on the rate of growth of chaos in thermal quantum systems with a large number of degrees of freedom is given, based on plausible physical assumptions, establishing this conjecture.
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Black holes and the butterfly effect

TL;DR: In this article, the authors used holography to study sensitive dependence on initial conditions in strongly coupled field theories and showed that the effect of the early infalling quanta relative to the t = 0 slice creates a shock wave that destroys the local two-sided correlations present in the unperturbed state.
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The String landscape, black holes and gravity as the weakest force

TL;DR: In this paper, an upper bound on the strength of gravity relative to gauge forces in quantum gravity was given, motivated by arguments involving holography and absence of remnants, the stability of black holes as well as the non-existence of global symmetries in string theory.

Dimensional reduction in quantum gravity

TL;DR: In this article, Abdus Salam argued that the observable degrees of freedom can best be described as if they were Boolean variables defined on a two-dimensional lattice, evolving with time.
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