Relativity/Cosmology
@RelativityPaper
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New General Relativity and Quantum Cosmology submissions to https://t.co/HHqPequzVU (not affiliated with https://t.co/HHqPequzVU)
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Joined April 2010
Accretion Disk Luminosity and Topological Characteristics for a Schwarzschild Black Hole Surrounded by a Hernquist Dark Matter Halo.
arxiv.org
In this work, we study some characteristics and gravitational signatures of the Schwarzschild black hole immersed in a Hernquist dark matter halo (SBH-HDM). We determine the black hole's remnant...
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The Sound of an Orbit: A Quantum Spectrum at the ISCO.
arxiv.org
We investigate the quantum signature of the innermost stable circular orbit (ISCO), a region of profound importance in black hole astrophysics. By modeling an atom as an Unruh-DeWitt detector...
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A new parametric observational study of $f(Q,B)$ gravity with modified chaplygin gas.
arxiv.org
In this work, we explore the cosmological dynamics of a modified gravity framework based on the function $f(Q,B)=δQ^{2}+βB$, where $Q$ denotes the nonmetricity scalar and $B$ is the...
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Sky localization and polarization mode reconstruction of gravitational waves from GW170104 and GW150914.
arxiv.org
The detections\citep{KAGRA:2023pio,LIGOScientific:2019lzm} and analysis of gravitational waves(GWs) have introduced us in a new era of our understanding of the cosmos, providing new insights into...
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Gravitationally induced entanglement at finite temperature: A memory-driven time-crystalline phase?.
arxiv.org
We study the impact of thermal effects on gravity-induced entanglement (GIE) in a system of quantum harmonic oscillators interacting with classical linearly polarized gravitational waves (GWs)....
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Results from an Einstein@Home search for continuous gravitational waves from Cassiopeia A and Vela Jr. using LIGO O2 data.
arxiv.org
We conduct two searches for continuous, nearly monochromatic gravitational waves originating from the central compact objects in the supernova remnants Cassiopeia A and Vela Jr. using public LIGO...
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Scattering cross section of the long gravitino wave in Schwarzschild spacetime.
arxiv.org
We investigate the scattering of gravitino wave in a Schwarzschild spacetime, focusing on the long-wavelength limit. Using perturbative techniques, we compute the differential scattering cross...
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On the relation between perspective-neutral, algebraic, and effective quantum reference frames.
arxiv.org
The framework of internal quantum reference frames (QRFs) constitutes a universal toolset for dealing with symmetries in quantum theory and has led to new revelations in quantum gravity, gauge...
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Robustness of analogue Hawking radiation in cavities with moving boundaries.
arxiv.org
In this work we explore the limitations and robustness of thermal radiation in dynamical Casimir systems serving as analogs for Hawking radiation. Through detailed numerical analysis, we...
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Distributed Acoustic Sensing for Environmental Monitoring, and Newtonian Noise Mitigation:Comparable Sensitivity to Seismometers.
arxiv.org
Newtonian noise limits the low-frequency sensitivity of ground-based gravitational wave detectors. While seismometers and geophones are commonly employed to monitor ground motion for Newtonian...
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Challenges for describing unitary evolution in nontrivial geometries: pictures and representations.
arxiv.org
Description of evolution between spatial slices in a general spacetime suffers from a significant difficulty: the states on the slices, in a given basis, are not related by a unitary...
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Apparent Horizons Associated with Dynamical Black Hole Entropy.
arxiv.org
We define entropic marginally outer trapped surfaces (E-MOTSs) as a generalization of apparent horizons. We then show that, under first-order perturbations around a stationary black hole, the...
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Direct Measurement of the Accretion Disk Formed in Prompt Collapse Mergers with Future Gravitational-Wave Observatories.
arxiv.org
The production site of heavy r-process elements, such as Gold and Uranium, is uncertain. Neutron star mergers are the only astrophysical phenomenon in which we have witnessed their formation....
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Quasinormal Modes of a Massive Scalar Field in Slowly Rotating Einstein-Bumblebee Black Holes.
arxiv.org
In this study, we examine the impacts of black hole spin, Lorentz-violating parameter, and the scalar field's mass on quasinormal modes (QNMs) of rotating Einstein-Bumblebee black holes, including...
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Chameleon Gravity as an Alternative to Dark Matter.
arxiv.org
By studying the chameleon gravity on galaxy scales, we investigate the effects of the chameleon dark matter. To perform this task, we consider the dynamics of the chameleon scalar field in the...
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Functional inference on deviations from General Relativity.
arxiv.org
Extensions of general relativity often predict modifications to gravitational waveform morphology that depend functionally on source parameters, such as the masses and spins of coalescing black...
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Exploring the dynamics of coincident f(Q) gravity in the presence of DBI-essence scalar field.
arxiv.org
In theoretical cosmology, symmetric teleparallel gravity or $f(Q)$ gravity based on nonmetricity tensor Q has become an interesting alternative to General relativity in recent years. The present...
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Gravity-mediated entanglement via infinite-dimensional systems.
arxiv.org
There has been a wave of recent interest in detecting the quantum nature of gravity with table-top experiments that witness gravitationally mediated entanglement. Central to these proposals is the...
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Hydrodynamical transports in generic AdS Gauss-Bonnet-scalar Gravity.
arxiv.org
The experimentally observed temperature-dependent shear and bulk viscosities of the quark-gluon plasma (QGP), along with its apparent violation of the Kovtun-Son-Starinets (KSS) bound...
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