482 papers
Challenging previous conclusions that curvature enhances entanglement, this paper demonstrates that while increasing curvature in de Sitter spacetime strengthens correlations between local field modes, it paradoxically decreases their entanglement, revealing a qualitative alteration of the vacuum's entanglement structure by the cosmological constant.
This paper proposes and experimentally validates a novel "Phase-Modulated-sideband × Phase-Modulated-sideband Wave Front Sensing" (PMPMWFS) technique for gravitational-wave detectors, which demodulates signals at the difference frequency between two anti-resonant sidebands to effectively decouple Power Recycling Cavity and incident beam alignment from arm cavity signals, thereby enabling stable, multi-degree-of-freedom control.
This paper explores the physics of nanohertz gravitational wave signals recently detected by pulsar timing arrays, examining their potential astrophysical origins from massive black-hole binaries and cosmological origins from early Universe phenomena to constrain high-energy physics and deepen our understanding of the cosmos.
This paper reports the first sub-solar mass compact binary search using LIGO's O4a data, which found no significant candidates but established the tightest constraints to date on merger rates and local dark matter fractions, significantly improving upon previous limits from earlier observing runs and microlensing surveys.
This paper demonstrates that in Rastall gravity, the non-minimal coupling between matter and geometry significantly alters the collapse threshold and exponential abundance of primordial black holes, establishing them as sensitive probes for testing modified gravity theories within current cosmological constraints.
This paper presents a generally covariant semi-classical framework within quantum field theory in curved spacetimes to unify and extend previous models of the coupling between internal degrees of freedom and motion in gravitational fields, predicting novel effects such as internal-energy-dependent field amplitudes and Berry-phase-inducing corrections to the Schrödinger equation.
The paper introduces -EFTCAMB, a publicly available, Cobaya-integrated Python extension of EFTCAMB that enables robust cosmological testing of arbitrary covariant Horndeski gravity theories through both EFT mapping and direct scalar field equation solving, the latter of which remains valid even in regimes where the EFT approach fails.
This paper investigates the extended thermodynamics of charged Hayward-AdS black holes surrounded by a cloud of strings and perfect fluid dark matter, demonstrating that these models exhibit van der Waals-like phase transitions, distinct Joule-Thomson expansion characteristics, and holographic heat engine efficiencies that are respectively enhanced by the cloud of strings and diminished by perfect fluid dark matter.
This paper investigates how primordial non-Gaussianity can convert small-scale Poisson fluctuations of evaporating primordial black holes into large-scale isocurvature perturbations in the dark sector, thereby establishing new constraints on dark matter production scenarios alongside re-evaluations of limits from overproduction, warm dark matter, and scalar-induced gravitational waves.
This paper analyzes radiative corrections in no-scale supergravity inflation models, demonstrating that while such corrections can destabilize predictions in certain Wess-Zumino scenarios, specific classes like the Cecotti model maintain small loop effects that preserve agreement with Planck CMB data.
This paper systematically investigates how Navarro-Frenk-White and Beta dark matter halo profiles influence the orbital dynamics and gravitational wave signatures of extreme mass ratio inspirals by modeling dynamical friction, accretion, and radiation reaction, revealing distinct long-term phase shifts and a unique energy flux cusp in the NFW model that could be detectable by future space-based observatories.
This paper proposes a framework for testing quantum gravity by analyzing the stochastic gravitational-wave background from evaporating near-Planck-mass primordial black holes, demonstrating that their unthermalized graviton spectra preserve distinct signatures of modified temperature-mass relations that can be used to discriminate between various beyond-semiclassical theories.
This paper employs the Parametrized Post-Einsteinian formalism and Fisher forecasts to demonstrate that the Laser Interferometer Space Antenna (LISA) can precisely constrain deviations from General Relativity in tensor, vector, and scalar gravitational wave polarizations emitted by massive black hole binaries, achieving high-precision tests of modified gravity theories in the strong-field regime.
This study proposes using Event Horizon Telescope polarimetric observations of M87's relativistic jet to detect axion-like particles by identifying degree-level electric vector position angle rotations caused by axion-photon coupling, which can be distinguished from plasma Faraday rotation through specific morphological diagnostics.
This paper provides a comprehensive review of analogue Hawking radiation in nonlinear quantum optics, outlining the theoretical concepts of the gravitational analogy and chronicling the timeline of key fiber-optical experiments from 2008 to the present.
This paper derives four-derivative corrections to the heterotic Kerr-Sen black hole solution via field redefinitions and boosts, demonstrating that the resulting distinct multipole moments offer a potential experimental signature to differentiate string theory from Einstein-Maxwell theory in gravitational wave data.
This paper demonstrates within the holographic QCD framework that the ground state in a strong magnetic field and finite baryon density is a chiral soliton lattice, which is interpreted as uniformly distributed D4-branes and unified through five-dimensional instanton charge, leading to a magnetic-field-dependent pion decay constant that qualitatively agrees with lattice QCD results.
This paper demonstrates the universality of entropy and Hawking radiation for non-extremal Kerr AdS black holes by showing that diverse microscopic approaches, including the Kerr/CFT correspondence, matrix model approximations, and CFT perspectives, consistently yield matching results even at high temperatures far from extremality.
This paper demonstrates that the trace-free Einstein tensor cannot be derived from any local action functional via variation with respect to the metric, even when the requirement of diffeomorphism invariance is removed.
This paper investigates the thermodynamics and topological classifications of a novel static non-extremal five-dimensional AdS black hole with four electric charges in gauged supergravity, demonstrating that its mass formulae satisfy both differential and integral thermodynamic relations while smoothly reducing to the known three-charge limit.