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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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Complexity of magnetization and magnetic simplification

- 01 May 2023 - 
TL;DR: In this paper , the effect of magnetic fields on the complexity of the formation of states in the gauge theories dual to two different gravitational models was investigated. But the authors focused on the effect on the number of degrees of freedom required to form a state and not only on the intensity of the magnetic field, but also on the degree of freedom needed to obtain it.
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Towards a Fisher-information description of complexity in de Sitter universe

TL;DR: In this paper, the complexity of a tensor network can be regarded as a Fisher information measure (FIM) of a dS universe, followed by several observations: (i) the holographic entanglement entropy admits a information-theoretical interpretation, (ii) on-shell action has a same description of FIM, (iii) complexity/action duality holds for dS spacetime.
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Quantum complexity and the virial theorem

TL;DR: In this article, a relation between Kolmogorov complexity and computational complexity in the thermal equilibrium has been established by applying the virial theorem to the group manifold of unitary operators.
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Primordial Gravitational Wave Circuit Complexity

TL;DR: In this paper , the quantum circuit complexity of primordial gravitational wave (PGW) was investigated for various cosmological models, such as de Sitter, inflation, radiation, reheating, matter, bouncing, cyclic and black hole gas model etc.
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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