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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

A quantum complexity lower bound from differential geometry

Jack A. Tuszynski
- 09 Jan 2023 - 
TL;DR: In this article , the authors apply the Bishop-Gromov bound to Nielsen's complexity geometry to prove lower bounds on the quantum complexity of a typical unitary, showing that the typical complexity is exponentially large in the number of qubits.
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Bounds on quantum evolution complexity via lattice cryptography

TL;DR: The resulting algorithmically implemented complexity bound systematically assigns lower values to integrable than to chaotic systems, as it is demonstrated by explicit numerical work for Hilbert spaces of dimensions up to \sim 10^4∼104.
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Wheeler-DeWitt states of the AdS-Schwarzschild interior

TL;DR: In this paper , a Gaussian wavepacket is constructed for the planar AdS-Schwarzschild interior in a minisuperspace approximation involving the volume and spatial anisotropy of the interior.
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Q-curvature and path integral complexity

TL;DR: In this article , the authors discuss the interpretation of path integral optimization as a uniformization problem in even dimensions, which allows for a systematical construction of the higher-dimensional path integral complexity in holographic conformal field theories in terms of Q-curvature actions.
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Random circuits have no shortcuts

Lorenzo Piroli
- 28 Mar 2022 - 
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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