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105 papers
Cosmological properties of black-hole hair in the linearly coupled scalar-Gauss-Bonnet theory
Dražen Glavan, Darío Jaramillo-Garrido
We investigate the superhorizon behavior of scalar hair sourced by black holes in de Sitter spacetime in the linearly coupled shift-symmetric scalar-Gauss-Bonnet theory. Working in…
Is the matrix completion of reduced density matrices unique?
Gustavo E. Massaccesi, Ofelia B. Oña, Luis Lain +4
Reduced density matrices are central to describing observables in many-body quantum systems. In electronic structure theory, the two-particle reduced density matrix (2-RDM) suffice…
Determining the ensemble N-representability of Reduced Density Matrices
Ofelia B. Oña, Gustavo E. Massaccesi, Pablo Capuzzi +5
The N-representability problem for reduced density matrices remains a fundamental challenge in electronic structure theory. Following our previous work that employs a unitary-evolu…
High-energy photons from Gamma-Ray Bursts, but no neutrinos
A. De Rújula
The Cannon-Ball model of Gamma-Ray Bursts and their afterglows--described in the text and in innumerable previous occasions--is extremely successful and predictive. In a few intrin…
Determining the N-representability of a reduced density matrix via unitary evolution and stochastic sampling
Gustavo. E. Massaccesi, Ofelia. B. Oña, Pablo Capuzzi +6
The N-representability problem consists in determining whether, for a given p-body matrix, there exists at least one N-body density matrix from which the p-body matrix can be obtai…
Statistics of the Random Matrix Spectral Form Factor
Alex Altland, Francisco Divi, Tobias Micklitz +2
The spectral form factor of random matrix theory plays a key role in the description of disordered and chaotic quantum systems. While its moments are known to be approximately Gaus…