We investigate the quasinormal mode (QNM) spectra for scalar and electromagnetic fields over a covariant loop quantum gravity (LQG) black hole. For fundamental modes, LQG effect reduces oscillations in field, however, it induces stronger field compared to classical case. Under perturbation, system enjoys faster decaying modes with more than field. Some peculiar phenomena emerge QNM higher overtones. A notable feature is substantial divergence observed first several overtones from their...

In this paper, we investigate the quasinormal mode (QNM) spectra for scalar perturbation over quantum-corrected black hole (BH) known as quantum Oppenheimer-Snyder (qOS) BH. The fundamental modes of qOS BH exhibit two key properties. First, there is a nonmonotonic behavior concerning parameter zero multipole number. Second, gravity effects result in slower decay modes. For higher overtones, significant deviation becomes evident between frequencies (QNFs) and Schwarzschild BHs. intervention...

Abstract Extreme mass ratio inspirals (EMRIs), where a small compact object into supermassive black hole, are excellent sources for the space-based laser interferometer gravitational wave (GW) detectors. The presence of dark matter (DM) halo surrounding hole will influence orbital evolution and emitted waveform binary. By direct observation GW signals, we assess detector's capability to detect whether an EMRI is immersed in DM measure its characteristic spatial scale 0 M . Apart from...

Abstract This paper explores the properties of quasinormal modes (QNMs) a regular black hole (BH) characterized by Minkowski core and sub-Planckian curvature. When focusing on special case, this BH exhibits identical large-scale behavior with Hayward some loop quantum gravity corrected (LQG-corrected) BH. A notable characteristic QNMs in is pronounced outburst overtones when compared to Schwarzschild (SS-BH). can be attributed deviation from SS-BH near-horizon geometry region due effect....

We investigate the scalar field system over a charged Weyl black hole, depicted by parameter $\ensuremath{\lambda}$. It is found that imaginary part of quasinormal mode spectra always negative and perturbation does not increase with time, indicating stable under perturbation. Furthermore, Hawking radiation exhibit qualitatively similar characteristic in they both rise rising $\ensuremath{\lambda}$ approach constant when large enough. Especially, we would like to emphasize an exponential...

Abstract In this paper, we exhaustively investigate the quasinormal modes (QNMs) of a probe scalar field over d -dimensional regular black hole (BH) characterized by parameter A . The frequencies (QNFs) exhibit different behaviors with respect to for $$d=4$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:mi>d</mml:mi> <mml:mo>=</mml:mo> <mml:mn>4</mml:mn> </mml:mrow> </mml:math> and $$d&gt;4$$ <mml:mo>&gt;</mml:mo> Firstly, trends QNFs completely opposite patterns...

Abstract The low-energy effective action of String Theory introduces corrections to the dilaton-graviton sector, resulting in deformed black holes beyond general relativity. We analyze extreme mass-ratio inspiral systems (EMRIs), where a stellar-mass object spirals into slowly rotating supermassive hole including distinct deviation parameter. This study examines effects this deformation on rate change orbital energy and angular momentum, evolution, phase dynamics, incorporating leading-order...

We study the information quantities, including holographic entanglement entropy (HEE), mutual (MI) and of purification (EoP), over Gubser-Rocha model. The remarkable property this model is zero density at ground state, in term which we expect to extract novel, even singular informational properties temperature limit. Surprisedly, do not observe any behavior entanglement-related physical quantities under Nevertheless, find a peculiar from that low region, HEE decreases with increase...

In this paper, we explore the properties of holographic entanglement entropy (HEE), mutual information (MI) and purification (EoP) in Lifshitz theory. These informational quantities exhibit some universal dual field For most configuration parameters temperatures, these change monotonously with dynamical critical exponent $z$. However, also observe non-monotonic behaviors for specific spaces temperatures. A particularly interesting phenomenon is that a dome-shaped diagram emerges behavior MI...

The transport features of the holographic two-currents model are investigated in Horndeski gravity framework. This system displays metallic or insulating characteristics depending on whether coupling parameter $\gamma$ is negative positive, but unaffected by other parameters such as strength momentum dissipation $\hat{k}$, doping $\chi$ and between two gauge fields $\theta$. Secondly, we demonstrate that thermal conductivities affected not only inherent properties black hole, also...

By fast Lyapunov indicator (FLI), we study the chaotic dynamics of closed string around charged black brane with hyperscaling violation (HV). The Hawking temperature, Lifshitz dynamical exponent and HV together affect this system. temperature plays role driving to escape infinity. There is a threshold value $z_{\ast}=2$, below which captured by no matter where placed at beginning. However, when $z>2$, escapes infinity if it near beginning, but initial position far away from brane, oscillates...

Extreme mass ratio inspirals (EMRIs), where a small compact object inspiralls onto supermassive black hole, are excellent sources for the space-based laser interferometer gravitational wave (GW) detectors. The presence of dark matter surrounding hole will influence binary orbital evolution and emitted waveform. By direct observation GW signals, we assess detector's capability to detect whether an EMRI is immersed in halo measure its characteristic spatial scale $a_0$ $M_{\rm halo}$. Apart...

In this letter, we study the charge response from higher derivatives over background with homogeneous disorder introduced by axions. We first explore bounds on coupling DC conductivity and anomalies of causality instabilities. Our results indicate no tighter constraints than that Schwarzschild–AdS (SS–AdS) background. And then optical our holographic system. find for case γ1<0 strength αˆ<2/3, there is a crossover coherent to incoherent metallic phase as αˆ increases. When beyond αˆ=2/3...

Abstract We investigate the features of charge transport in a novel holographic quantum phase transition (QPT) model with two metallic phases: normal and metallic. The scaling behaviors direct current (DC) resistivity thermal conductivity at low temperatures both phases are numerically computed. numerical results analytical ones governed by near horizon geometry agree perfectly. Then, low-frequency alternating (AC) electric systematically investigated. A remarkable characteristic is that...

We explore the response of momentum dissipation introduced by spatial linear axionic fields in a holographic model without self-duality, which is broke Weyl tensor coupling to Maxwell field. It found that for positive parameter $$\gamma >0$$ , dissipation, characterized $${\hat{\alpha }}$$ drives an incoherent metallic state with peak at low frequency into another phase dip. While <0$$ oppositive scenario observed. Another interesting feature our some observables including DC conductivity,...

In this paper, we implement a $3$-dimensional holographic effective theory with gauge-axion coupling. The analytical black hole solution is worked out. We investigate the Direct current (DC) thermoelectric conductivities. A novel property that DC electric conductivity for vanishing coupling temperature dependent. It different from of $4$-dimensional axion model whose independent. addition, induces metal insulator transition (MIT) at zero temperature. properties other conductivities are also...

In this paper, we make a systematical and in-depth exploration on the phase structure behaviors of butterfly velocity in an Einstein-Maxwell-dilaton-axions (EMDA) model. Depending model parameter, there are two kinds mechanisms driving quantum transition (QPT) One is infrared (IR) geometry to be renormalization group (RG) unstable, other strength lattice deformation leading some kind bifurcating solution. We also find novel QPT metal phases. The study behavior crossing indicates that or its...

Abstract In this paper, we make a systematical and in-depth study on the chaotic dynamics of string around conformal black hole. Depending characteristic parameter hole initial position string, there are three kinds dynamical behaviors: ordered, being captured, but not captured. A particular interesting observation is that sharp transition in when horizon disappears, which independent string. It provides possible way to probe structure massive body. We also examine generalized MSS...

We investigate the quasi-normal mode (QNM) spectra for scalar and electromagnetic fields over a covairant loop quantum gravity black hole (LQG-BH). For fundamental modes, LQG effect reduces oscillations in field, however it induces stronger comparing to classical case. Under field perturbation, system enjoys faster decaying modes with more than field. Some peculiar phenomena emerge QNM higher overtones. A notable feature is substantial divergence observed first several overtones from their...

Abstract The black hole scalarization in a special Einstein-scalar–Gauss–Bonnet (EsGB) gravity has been widely investigated recent years. Especially, the spontaneous of scalar-free de-Sitter (dS) spacetime possesses interesting features due to existence cosmological horizon. In this work, firstly, we focus on massive scalar field perturbation Schwarzschild dS (SdS) EsGB theory. By analyzing fundamental QNM frequency and time evolution perturbation, figure out unstable/stable regions...

We study the electromagnetic (EM) duality from <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mn mathvariant="normal">6</mml:mn></mml:mrow></mml:math> derivative theory with homogeneous disorder. find that, change of sign coupling parameter id="M2"><mml:mrow><mml:msub><mml:mrow><mml:mi>γ</mml:mi></mml:mrow><mml:mrow><mml:mn mathvariant="normal">1</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math> id="M3"><mml:mrow><mml:mn theory, particle-vortex disorder...

We construct novel scalarized black hole (BH) solutions beyond the general relativity (GR) framework. These BH are extended from Schwarzschild one and non-Schwarzschild in pure Einstein-Weyl gravity. By studying entropy free energy, we demonstrate that extending exhibits thermodynamically preferred. obtain these by directly solving full fourth-order equations of motion. This narrows problematic solution space obtained commonly adopted second-order reduction to physically valid spaces. Our...

Abstract We construct a two-current model. It includes two gauge fields, which introduce the doping effect, and neutral scalar field. And then we numerically an AdS black brane geometry with hair. Over this background, study fermionic system pseudoscalar Yukawa coupling. Some universal properties from coupling are revealed. In particular, as increases, there is transfer of spectral weight low energy band to high band. The over scales but not all scales. peculiar also explored. shows that...

In this letter, we decouple the perturbative equations of gauge fields in holographic two-currents model. way, analytically work out incoherent conductivities. These conductivities can be expressed terms thermodynamic quantities system. Therefore, they are intrinsic As a by-product, also discuss mathematical equivalence between two theories with coupling and without fields. addition, when θ increases to θ=1, soft gap emergences at low frequency Re[σA]/Re[σB], which is independent doping χ.

We construct a holographic SU(2) p-wave superconductor model with Weyl corrections. The high derivative (HD) terms do not seem to spoil the generation of superconducting phase. mainly study properties AC conductivity, which is absent in conductivities phase exhibit obvious anisotropic behaviors. Along $y$ direction, conductivity $\sigma_{yy}$ similar that s-wave superconductor. energy gap exhibits wide extension. For $\sigma_{xx}$ along $x$ behaviors real part normal state are closely...