https://jhap.du.ac.ir/ Journal of Holography Applications in Physics en daily 1 Thu, 19 Mar 2026 00:00:00 +0330 Thu, 19 Mar 2026 00:00:00 +0330 https://jhap.du.ac.ir/article_2073.html In this paper I explain the relation between the need for observers in de Sitter space and the spontaneous breakdown of time-reversal symmetry. In this paper I explain the relation between the need for observers in de Sitter space and the spontaneous breakdown of time-reversal symmetry. https://jhap.du.ac.ir/article_2089.html It is widely thought that the quantum theory of de Sitter space requires the existence of a physical observer in the static patch. What exactly is meant by an observer is unclear; it could be anything from a few photons with energy just above the Gibbons-Hawking temperature to a gravitationally bound cluster of galaxies. In a recent note I explained that one way the need for observers can arise is from the spontaneous breaking of time-reversal symmetry. This longer paper expands on the subject, filling in conceptual arguments that were implicit but not explicitly stated in the earlier paper. https://jhap.du.ac.ir/article_2075.html The multiple classes of graphs that can be labeled gracefully are defined using the principles of neutrosophy. By imposing structural and labeling constraints on the graph, it becomes possible to define the n-th position uniquely under neutrosophic fuzzy conditions. The variety of vertex labels and edge labels may coincide for more than one vertex, and a complete proof of existence is provided for the neutrosophic fuzzy labeling of the graphs discussed in this research. Using the neutrosophic fuzzy framework, all three forms of uncertainty in the labeling process are effectively represented. In this work, neutrosophic fuzzy graceful labeling is further connected to applications involving UV rays generated from a point source and holography. The uncertainty-handling capability of neutrosophic fuzzy labeling allows it to model imprecise intensity variations of UV radiation and the wave-interference patterns fundamental to holographic reconstruction. Thus, we develop a systematic method for applying the neutrosophic fuzzy framework to network design, routing, and optimization problems, as well as to holographic encoding where labeling consistency and uncertainty coexist. In addition to providing representations of the proposed neutrosophic fuzzy labeling framework for selected graph families, the paper demonstrates that labeling constraints can yield consistent graph while managing uncertainty associated with complex physical inputs such as UV propagation and holographic wave patterns. Compared to classical graceful labeling, neutrosophic fuzzy labeling offers enhanced capability to incorporate and handle imprecise, fluctuating, and partially known data. This study lays the foundation for future theoretical refinement and future algorithm development for neutrosophic fuzzy graph labeling with respect to the graceful constraints relating to optical modeling, UV radiation analysis, and holographic systems.      https://jhap.du.ac.ir/article_2087.html Metric-kinetic self-acceleration can quantitatively introduce a chronal (instantaneous) reason for the non-local emergence of active and passive field masses in their holistic distribution. Four Hilbert variations of Ricci\rq{s} action for a holistic hierarchy with Euclidean matter-space and dilated time invariant reveal a monistic analogue to Einstein's Equation. The Ricci scalar and holographic mass density can similarly be described by local relativistic acceleration arising from the primary cause of metric time dilation due to chronal information correlations. Shannon optimal distribution of information defines equilibrium metric stresses and the inhomogeneous chronal flow which is responsible for the local generation of mass densities in a holistic field hierarchy. Non-metric information perturbations temporarily drive the monistic universe of massive holograms "from being to becoming". https://jhap.du.ac.ir/article_2074.html This work shows that quantum-gravity-motivated generalized uncertainty principles (GUP) produce calculable and phenomenologically relevant modifications to the Cooper-Frye freeze-out prescription that maps hydrodynamic fields to hadronic momentum spectra in relativistic heavy-ion collisions. Using the linear Ali Das Vagenas GUP, which alters both the phase-space measure and the single-particle dispersion relation, the corresponding deformed particle current is constructed and its flux across a freeze-out hypersurface is evaluated. The resulting invariant spectrum acquires a momentum-dependent correction governed by a single dimensionless function that enhances high-momentum modes. For a static, homogeneous hypersurface the full expression can be written in closed analytic form, and the structure of the correction allows straightforward implementation in blast-wave-type models. The result is also directly relevant to holography-informed heavy-ion modeling, where gauge/gravity duality constrains the strongly coupled plasma dynamics but the conversion to hadron spectra is still performed through a Cooper-Frye freeze-out map.  Our findings demonstrate that Planck-scale deformations of quantum mechanics can leave characteristic imprints on freeze-out observables, opening a novel avenue for constraining GUP scenarios with heavy-ion data. https://jhap.du.ac.ir/article_2081.html In this paper, we introduce an exact solution for a Hayward black hole (BH) by incorporating anisotropic perfect fluid influenced by nonlinear electrodynamics and non commutative geometry. The solution obtained resembles de Sitter spacetime at a small value of $r$ ($r\to 0$) and at a large distance ($r\to \infty$) resembles the regular Schwarzschild geometry . In the absence of non commutative geometry the solution obtained interpolates with the Hayward BH and as non commutative geometry inspired BH in the absence of magnetic monopole charge. Non commutative geometry modifies thermodynamic properties of the BH. The calculation of Hawking temperature and its graphical analysis indicate that the temperature reaches its peak at the point of heat capacity divergence. https://jhap.du.ac.ir/article_2077.html In this work, we introduce a holography-based method for generating Bessel–Gaussian vortex beams (BGVBs). The approach embeds a helical phase into a diffraction grating and then applies a ring-shaped transmission function. Embedding the helical phase converts the structure into a fork grating, while multiplication by the ring aperture ensures that the vortex beam produced in the first diffraction order evolves into a BGVB in the far field. The proposed holographic element was fabricated on a glass substrate using lithography, and illumination with a Gaussian beam of suitable waist generated a clear BGVB in the first diffraction order. The measured intensity profile shows excellent agreement with theoretical predictions. To determine the topological charge (TC), we employed an astigmatic grating with locally parallel grooves exhibiting second-order curvature. Introducing astigmatic aberration at an appropriate propagation distance produces elongated intensity fringes, and counting these fringes allows accurate determination of the TC. Numerical simulations and experimental measurements exhibit strong consistency, confirming the effectiveness of the proposed method. https://jhap.du.ac.ir/article_2082.html The Holographic Computational Universe (HCU) introduces a fundamental paradigm shift in physics by asserting that time, spacetime, gravity, and matter emerge from the quantized and conserved transduction of bulk entropy into boundary information through the Holographic Thermodynamic Cycle (HTC). This cyclic eight-phase renewal mechanism maintains global informational balance and drives the universe’s continual self-updating. In this framework, space is not an absolute background but a relational structure: a dynamic network of Rindler–Compton (RC) cells, each encoding one nat of information per HTC. Time is not an external parameter but a computational variable, arising from the ordered succession of Quantum Informational Ticks (QITs), the minimal holographic computations that refresh boundary surfaces. Entropy quantifies the evolving informational phase space and increases because the universe persistently computes and records its own structure. Gravity is the thermodynamic response to informational disequilibrium, manifesting as curvature generated by entropy gradients across the holographic boundary. By unifying relativity, quantum mechanics, holography, thermodynamics, and information theory into a single physical computational framework, HCU reconceives the universe as a non-formal, non-algorithmic system whose evolution is governed by irreversible informational transduction rather than symbolic computation. The HCU offers a coherent and experimentally testable paradigm that simultaneously addresses quantum gravity, grounds the Second Law of Thermodynamics, explains temporal irreversibility, and defines universe itself as an autonomous, non-algorithmic, informational, holographic computational self-learning system. https://jhap.du.ac.ir/article_2080.html In recent years, research has concentrated on finding techniques to create traversable wormholes that circumvent the exotic matter problem or violate the null energy condition (NEC). Scientists are investigating alternate gravity theories and specific frameworks of ordinary matter that might potentially stabilize a wormhole throat, eliminating the necessity for negative energy density. Casimir energy, a quantum field theory phenomenon, provides a plausible option for producing traversable wormholes. Because Casimir energy can naturally produce specific regions of negative energy density, researchers are exploring how this artificial negative energy may function as the exotic matter needed to stabilize a wormhole's throat, potentially avoiding the need for theorized exotic matter. This research studies traversable wormhole geometries using Casimir energy as the source of the requisite exotic matter, looking at solutions within the framework of three different functional forms of $f(Q)$ gravity. The three functional forms taken are the power-law form, the inverse power-law form, and the logarithmic form for investigation. In all three cases, energy conditions are discussed. The anisotropy parameter and EoS parameter are analyzed to find a plausible solution for a traversable wormhole space-time. https://jhap.du.ac.ir/article_2083.html In this paper, we construct regular black holes coupled with the Cloud of String, which becomes Maxwell's theory in the weak field limit, and we can compare new attributes against the standard Letailier black hole and Schwarzschild black hole. The thermodynamic quantities associated with the black hole are modified in the presence of CoS. We also study the global properties of the solutions and derive the corrected first law of thermodynamics. In addition, we also study the local and global stability of the black hole solution. https://jhap.du.ac.ir/article_2079.html Entropic Dynamics (ED) provides a statistical–inferential foundation for physical laws, deriving motion and field equations from principles of entropy maximization rather than quantization postulates. The ED reconstructs quantum mechanics by treating the evolution of probability distributions on configuration space as driven by information constraints, yielding the Schrödinger equation as a non-dissipative diffusion process. Building on this foundation, the present work extends the ED framework into a Unified Entropic Dynamics (UED) formulation that encompasses classical, quantum, relativistic, thermodynamic, and gravitational phenomena within a single information-geometric principle. By maximizing entropy subject to constraints on diffusion, drift, and gauge covariance over a manifold endowed with a supermetric $H_{ab}$, we derive a universal field equation that merges the Fokker–Planck and Hamilton–Jacobi structures into one covariant form. When specialized to different dynamical variables, this equation reproduces the harmonic oscillator, Schrödinger, Maxwell, Klein–Gordon, and gravitational wave equations, thereby revealing a deep equivalence between probabilistic inference and dynamical law. The UED framework demonstrates that spacetime geometry, quantum coherence, and thermodynamic diffusion emerge as complementary expressions of the same entropic process—establishing a unified inferential foundation for both microscopic and macroscopic physics. In this formulation, energy, probability, and entropy are intertwined aspects of information geometry, providing a consistent inferential foundation for understanding classical, quantum, and gravitational dynamics as complementary expressions of a single entropic law. https://jhap.du.ac.ir/article_2078.html This introductory work combines bottom-up and top-down approaches towards understanding the underlying categorical structure of possible unifying theories descending from string theory. Guided by well-established developments in the realm of categorical algebraic geometry and topological holography, we explain why abelianisation could potentially lead to furthering the understanding of how to embed Beyond the Standard Model scenarios in supersymmetric setups. https://jhap.du.ac.ir/article_2098.html In this study, we have put the mechanism for a Friedmann equation of modified f(G) gravity by solving it with numerical method in the view of matter with pressure-less condition. This mechanism allows us to forecast the redshift action of expansion rate of the Hubble. Here, in this paper, we have applied a Bayesian Markov Chain Monte Carlo (MCMC) technique, which is applying late time cosmic observances to put limitation on the model parameters of the Gauss Bonnet . Our understanding results in the fact that the $f(G)$ model can restore low redshift action of the standard ($\Lambda$ CDM) model. We have used Hubble (OHD), Pantheon and RSD for MCMC analysis of the logarithmic model of $f(G)$ and to constrain parameters including \(\Omega_m\) and \(H_{0}\).