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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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Journal ArticleDOI

Holographic Entanglement of Purification from Conformal Field Theories

TL;DR: In this paper, a conformal field theoretic interpretation of the holographic entanglement of purification is proposed, which is defined as the minimal area of the Entanglement wedge cross section.
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Holographic studies of Einsteinian cubic gravity

TL;DR: In this paper, it was shown that η/s is given by a non-analytic function of the ECG coupling, and that the existence of positive-energy black holes strictly forbids violations of the KSS bound.
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Path-Integral Complexity for Perturbed CFTs

TL;DR: A path-integral optimization for two dimensional conformal field theories perturbed by relevant operators based on calculations in free field theories as well as general arguments of RG flows in field theories is formulated.
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Holographic complexity for defects distinguishes action from volume

TL;DR: In this paper, two holographic complexity proposals for the case of a 2D boundary CFT with a conformal defect were explored and the results showed that the complexity of the reduced density matrix for subregions enclosing the defect is not influenced by the presence of the defect.
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Holographic Complexity And Cosmological Singularities

TL;DR: In this article, the evolution of holographic complexity in various AdS/CFT models containing cosmological singularities was studied, and it was shown that a notion of complexity measured by extremal bulk volumes tends to decrease as the singularity is approached in CFT time.
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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