We investigate the shadows and photon spheres of four-dimensional Gauss-Bonnet black hole with static infalling spherical accretions. show that for both cases, shadow sphere are always present. The radii independent profiles accretion a fixed constant, implying is signature spacetime geometry it hardly influenced by in this case. Because Doppler effect, found to be darker than one. also effect constant on sphere, find larger is, smaller will be. In particular, observed specific intensity...

We construct a gravity dual for charge density waves (CDW) in which the translational symmetry along one spatial direction is spontaneously broken. Our linear perturbation calculation on side produces frequency dependence of optical conductivity, exhibits two familiar features waves, namely pinned collective mode and gapped single-particle excitation. These indicate that our also provides new mechanism to implement metal insulator phase transition by CDW, further supported fact d.c....

The phase structure of holographic entanglement entropy is studied in massive gravity for the quantum systems with finite and infinite volumes, which bulk dual to calculate minimal surface area a black hole brane respectively. In entropy$-$temperature plane, we find both there Van der Waals-like transition as case thermal plane. That is, first order small charge second at critical charge. For transition, equal law checked exponent heat capacity obtained. All results show that same regardless...

It has recently been shown that the strong cosmic censorship conjecture can be violated by massless neutral scalar field in nearly extremal Reissner-Nordstrom--de Sitter black hole. However, formation of such a hole gravitational collapse necessitates presence charged sector on top Einstein-Maxwell system. Thus, we numerically calculate quasinormal modes for spacetime generalizing characteristic formulation to case. As result, is recovered our except highly limit...

It was recently shown that Strong Cosmic Censorship might be violated for near-extremally-charged black holes in 4-dimensional de Sitter space under scalar perturbations. Here, we extend the study of neutral massless perturbations higher dimensions and discuss dimensional influence on validity hypothesis. By giving an elaborate description Reissner-Nordstr\"{o}m-de $d=4,5$ $6$ conclude is near extremality.

We apply the new version of gedanken experiment designed recently by Sorce and Wald, to over-spin 5-dimensional Myers-Perry black holes. As a result, extremal holes cannot be over-spun at linear order. On other hand, although nearly could order, this process is shown prohibited quadratic order correction. Thus no violation weak cosmic censorship conjecture occurs around

We present the Fermi story of strong cosmic censorship in near-extremal Reissner-Nordstrom-de Sitter black hole. To this end, we first derive from scratch criterion for quasi-normal modes Dirac field to violate such a background, which turns out be exactly same as those Bose fields, although involved energy momentum tensor is qualitatively different that fields. Then extract low-lying by Prony method, apply Crank-Nicolson method evolve our double null coordinates. As result, it shows fixed...

After reformulating $F($Riemann$)$ gravity theory as a second derivative by introducing two auxiliary fields to the bulk action, we derive surface term well corner supplemented action for generic non-smooth boundary such that variational principle is posed. We also introduce counter make invariant under reparametrization null segment. Then demonstration of power our formalism, not only do apply expression full evaluate corresponding growth rate Wheeler-DeWitt patch in Schwarzchild anti-de...

A bstract Taking into account that the real quantum materials are engineered generically at a finite chemical potential, we investigate Einstein ring structure for lensed response of complex scalar field as probe wave on charged AdS black hole in context AdS/CFT. On one hand, find resulting radius has no variation with which is similar to behavior weakly interacting system. other not only can such exist well within screen, but also temperature dependence its exhibits distinct feature sense...

The rate of penetration (ROP) is an important indicator affecting the drilling cost and performance. Accurate prediction ROP has guiding significance for increasing speed reducing costs. Recently, numerous studies have shown that machine learning techniques are effective means to accurately predict ROP. However, in petroleum engineering applications, its robustness generalization cannot be guaranteed. traditional empirical model good ability. Based on quantification data similarity, this...

We study the thermodynamics of modified black holes proposed in context gravity's rainbow. A notion intrinsic temperature and entropy for these is introduced. In particular a specific class Schwarzschild solutions, their are obtained compared with those previously from dispersion relations deformed special relativity. It turns out that results two different strategies coincide, this may be viewed as support proposal equivalence principle.

Tree peony seed is unique for its super-high content of unsaturated fatty acid and thus considered as an important source woody oil. However, photosynthetic production greatly reduced under high light intensity air temperature during the filling period, which negatively affects yield quality. The objective this study was to determine if appropriate shading improves quality in oilseed peony. In study, trees were shaded by different density polyethylene nets from four weeks after flowering...

Although holographic duality has been regarded as a complementary tool in helping understand the nonequilibrium dynamics of strongly coupled many-body systems, it still remains remarkable challenge how to confront its predictions quantitatively with real experimental scenarios. By matching vortex phenomenological dissipative Gross-Pitaevskii models, we find that dissipation mechanism can be well captured by Landau form rather than Keldysh one, although latter is much more widely used...

Tobacco brown spot caused by Alternaria alternata is a devastating fungal disease endangering plant production. To effectively control disease, an antagonistic Actinomyces strain, Streptomyces hygroscopicus JY-22, was isolated from rhizospheric soil, which remarkably restrains the growth of phytopathogenic fungus alternata. This strain and its culture filtrate showed significant antifungal activity against Firstly, confrontation method strains JY-22 that had noticeable alternata, including...

Using holographic duality, we investigate the impact of finite temperature on instability and splitting patterns quadruply quantized vortices, providing first-ever analysis in this context. Through linear stability analysis, reveal occurrence two consecutive dynamical transitions. At a specific low temperature, dominant unstable mode transitions from twofold rotational symmetry to threefold one, followed by transition one fourfold at higher temperature. As is increased, also observe fivefold...

As the criterion for applicability of background subtraction method, not only finiteness condition resulting Hamiltonian but also validity first law black hole thermodynamics can be reduced to form amenable analysis at infinity. With this, we further show that method is applicable Einstein's gravity, its higher derivative corrections holes in both asympotically flat and AdS spacetimes. This thus corrects everlasting bias rather restrictive compared alternative covariant counterterm since it...

Longer thought, better performance: large language models with deep reasoning capabilities, particularly o1-like models, have demonstrated remarkable performance by generating extensive thought processes during inference. This trade-off reveals a potential vulnerability: adversaries could compromise model forcing immediate responses without processes. To this end, in paper, we introduce novel attack scenario targeting the long of and propose BoT (Break CoT), which can selectively break...

A bstract In this paper, we extend the study of holographic superfluids from planar topology to spherical topology, inspired by recent studies on Bose-Einstein condensation (BEC) shell-shaped geometry. We investigated superfluid phase transition normal fluid and its Quasi-Normal Modes (QNMs) sphere. It turns out that critical temperature for sphere is higher than in case. four different solutions backgrounds large small black holes. The calculation free energy selects most stable solution....

Recently Hollands proposed a new formula for the entropy of dynamical black hole an arbitrary theory gravity obtained from diffeomorphism covariant Lagrangian via Noether charge method []. We present alternative, pedagogical derivation <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mrow><a:mi>f</a:mi><a:mo stretchy="false">(</a:mo><a:mi>R</a:mi><a:mo stretchy="false">)</a:mo></a:mrow></a:math> as well canonical scalar-tensor by means conformal transformations....

Summary Accurate rate of penetration (ROP) prediction is essential for optimizing the drilling process and improving efficiency. Traditional empirical models often struggle to capture complex nonlinear relationships between ROP various engineering parameters. In this study, we introduce a research workflow that integrates automatic machine learning with model interpretability. The based on collaborative strategy realizes automated data processing stacking integration multiple models,...