arXiv subjects

Maryem Jemri

Publications and source records attributed to Maryem Jemri.

8 recordsLinked to original sources

arXiv2026

Constrained Scenarios of Non-Commutative Schwarzschild Black Holes with Global Monopoles from Van der Waals Behaviors

Combining thermodynamics and optics, we investigate the Van der Waals behaviors of non-commutative Schwarzschild black holes with global monopoles. First, we examine the constrained thermodynamic recovering such properties. Using these thermodynamic results, we approach the shadows by merging Event Horizon Telescope findings and the Van der Waals limits. In this context, we provide a machine learning study to determine the compatibility with the empirical data of M87^*, SgrA^*_{\mathrm{VLTI}}, and SgrA^*_{\mathrm{Keck}} black holes. As a result, we find that such a proposed model matches with the M87^* observational data.

hep-th↗

arXiv2026

Constraining Black Hole Parameters in Non-Commutative Geometry using Machine Learning

Motivated by string theory, we constrain non-commutative black hole parameters through shadow behaviors using machine learning techniques combined by CUDA computations. To do so, we first investigate the structure of the event horizon of non-commutative black holes in the presence of string clouds and dark energy sectors by exploiting CUDA-based methods. We numerically approach the shadow properties and the energy emission rate of rotating and charged black holes in non-commutative geometry via such high-performance parallel computings. To bridge these findings with observational data, we implement a CUDA-based framework in order to constrain the involved black hole parameters including the non-commutative one. Using the resulting numerical data, we build a robust training datasets for a fully connected neural network to determine whether a given set of parameters matches with the observational data provided by Event Horizon Telescope collaborations. As a result, we find that the non-commutative model under study is consistent with the observations of $SgrA^*_{\mathrm{Keck}}$ black holes.

gr-qc↗

arXiv2025

Dunkl-Corrected Deformation of RN-AdS Black Hole Thermodynamics

In this work, we derive a new class of charged black holes by introducing Dunkl derivatives in the four dimensional spacetime. To construct such solutions, we first compute the Ricci tensor and the Ricci scalar using the Christoffel symbols. Substituting them into the modified Einstein field equations via extended Dunkl derivations, we obtain the metric function of charged Dunkl black holes. Next, we investigate the charge effect on the corresponding thermodynamical properties by computing the associated quantities. To study the thermal stability, we calculate the heat capacity. After that, we approach the P-v criticality behaviors by determining the critical pressure Pc, the critical temperature Tc and the critical specific volume vc in terms of Q and two parameters A and B carrying data on the Dunkl reflections. Precisely, we show that the ratio Pcvc Tc is a universal number with respect to the charge Q and B parameters. Taking a zero limit of A, we recover the Van der Waals fluid behaviors. For Joule-Thomson expansion effects for such charged black holes, we reveal certain similarities and the differences with Van der Waals fluids. Finally, we discuss the phase transitions via the Gibbs free energy computations.

hep-th↗

arXiv2025

On Thermodynamics of Charged Black Holes via Extended Space-time Derivatives

Inspired by non-commutative geometry in string theory, we propose extended derivatives in black hole physics by incorporating a real antisymmetric tensor of rank 2 carrying similarities of certain stringy fields. Using gauge theory formulation of gravity via de Sitter group theory, we first find the associated black hole solutions by solving the Einstein field equations. Then, we study the thermodynamic properties by approaching the stability analysis, the criticality, and the phase transitions. Concretely, we investigate the P-V criticality behavior of the obtained solution. We compute and examine the Gibbs free energy revealing comparable attitudes with the Van der Waals phase transitions. Combining such results, we provide constraints on the deformed parameter B and the charge Q with the help of CUDA numerical methods exploited in machine learning computations. Precisely, we show that there are suitable ranges for such parameters where the obtained black holes behave like the Van der Waals fluid systems.

hep-th↗

arXiv2025

Thermodynamics and Criticality of Noncommutative RN-AdS Black Holes

Inspired by string theory topics, we investigate the Reissner Nordstrom AdS black holes in noncommutative spacetime with Lorentzian smeared distributions. Concretely, we study certain thermodynamic properties including the criticality behaviors by computing the relevant quantities. For large radius approximations, we first derive the asymptotic expansions of the mass and charge functions appearing in the metric function of such black holes. Then, we approach the thermodynamics in the extended phase space. After the stability discussion, we examine the P V criticality in noncommutative geometry by calculating the corresponding thermodynamic quantities. As a result, we show that the proposed black holes exhibit certain similarities with Van der Waals fluid systems. Finally, we present a discussion on the Joule Thomson expansion showing perfect universality results appearing in charged AdS black holes.

hep-th↗

arXiv2025

Constraining Black Hole Shadows in Dunkl Spacetime using CUDA Numerical Computations

With the help of CUDA high-performance numerical codes exploited in machine learning, we investigate the shadow aspect of new rotating and charged black holes using the Dunkl derivative formalism. Precisely, we first establish the corresponding metric function encoding the involved physical properties including the optical character. Exploiting such accelerated simulations, we approach the horizon radius behaviors in order to determine the regions of the module space providing physical solutions. Applying the Hamilton-Jacobi mechanism, we assess the shadow aspect for non-rotating and rotating solutions. Using such an aspect, we evaluate the energy rate of emission. Developing a high-performance CUDA numerical code, we derive strict constraints on the Dunkl deformation parameters in order to establish a link with the shadow observations provided by the Event Horizon Telescope collaboration.

gr-qc↗

arXiv2025

On RN-AdS Black Holes with a Cloud of Strings and Quintessence in Noncommuative Geometry

Motivated by certain recent works, we study thermodynamic and optical properties of the Reissner-Nordström-AdS black holes in a noncommutative spacetime with a string cloud and quintessence dark fields. After analyzing the global and the local stabilities, we examine the criticality and the Joule-Thomson expansion behaviors in such noncommutative backgrounds. Concretely, we find that the critical universal numbers X_N can be expressed as X_0 + NX, where N is the quintessence parameter and X_0 is the critical universal number of the Reissner-Nordström-AdS black holes in a NC spacetime without additional external fields. Furthermore, we find that Van der Waals behaviors can be recovered by strictly constraining the charge in terms of external parameters. To conclude this work, we compute and examine the deflection angle of lights in such a modified spacetime geometry.

hep-th↗

arXiv2025

Stability and Criticality Behaviors of Accelerating Charged AdS Black Holes in Rainbow Gravity

In this work, we investigate the thermodynamical properties of accelerated charged Anti-de Sitter black holes in the context of rainbow gravity. Concretely, we compute the corresponding quantities needed to study the thermal stability and the critical behaviors including the phase transitions. Linking the acceleration parameter $A$ and the horizon radius $r_h$ via a constant parameter $a$, we discuss the $P$-$v$ criticality behaviors by calculating the critical pressure $P_c$, the critical temperature $T_c$ and the critical specific volume $v_c$ in terms of $a$ and the rainbow gravity parameter $\varepsilon$. As results, we reveal that the ratio $ \dfrac{P_{c}v_{c}}{T_{c}}$ is an universal number with respect to the charge. In small limits of the external parameters, we recover the Van der Waals fluid behaviors.

gr-qc↗