LAUSR

Gravitational atoms beyond the test field limit: the case of Sgr A* and ultralight dark matter

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0 Published in 2024 at "Classical and Quantum Gravity"

DOI: 10.1088/1361-6382/ae110a

Abstract: We construct gravitational atoms including self-gravity, obtaining solutions of the Einstein–Klein–Gordon equations for a scalar field (SF) surrounding a non-rotating black hole (BH) in a quasi-stationary approximation. We resolve the region near the horizon as… read more here.

Keywords: field; dark matter; ultralight dark; gravitational atoms ... See more keywords

The stochastic gravitational wave background from primordial gravitational atoms

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0 Published in 2024 at "Journal of Cosmology and Astroparticle Physics"

DOI: 10.1088/1475-7516/2024/11/039

Abstract: We propose a scenario of primordial gravitational atoms (PGAs), which may exist in the current and past universe due to spinning primordial black holes (PBHs) and very light bosonic fields. In a monochromatic mass scenario… read more here.

Keywords: gravitational wave; primordial gravitational; gravitational atoms; stochastic gravitational ... See more keywords

Detectability of gravitational atoms in black hole binaries with the Einstein Telescope

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0 Published in 2025 at "Physical Review D"

DOI: 10.1103/h7ld-vv9p

Abstract: Rotating black holes can amplify ultralight bosonic fields through superradiance, forming macroscopic clouds known as gravitational atoms. When the cloud forms around one of the components of a binary system, it can undergo a series… read more here.

Keywords: detectability gravitational; black hole; atoms black; gravitational atoms ... See more keywords

Gravitational atoms

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0 Published in 2019 at "Physical Review D"

DOI: 10.1103/physrevd.99.123011

Abstract: Particles in a yet unexplored dark sector with sufficiently large mass and small gauge coupling may form purely gravitational atoms (quantum gravitational bound states) with a rich phenomenology. In particular, we investigate the possibility of… read more here.

Keywords: cosmology; frequency; gravitational atoms;

Graviton Scattering on Gravitational Atoms: Relic Graviton Shot Noise

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0 Published in 2025 at "International Journal of Modern Physics D"

DOI: 10.1142/s0218271825440031

Abstract: We study the scattering of a graviton on a gravitational atom. By gravitational atom we mean a quantum mechanical system of a gravitational (bound) state of two massive particles, with possibly some boundary conditions (such… read more here.

Keywords: shot noise; atoms relic; graviton scattering; graviton ... See more keywords