arXiv subjects

Wen-Bin Chang

Publications and source records attributed to Wen-Bin Chang.

4 recordsLinked to original sources

arXiv2026

$R^2$ corrections to Complexity Growth with a Probe String

We investigate the effect of $R^2$ corrections on holographic complexity growth within the framework of the Complexity=Action (CA) conjecture. By introducing a probe string into a Gauss-Bonnet (GB) $AdS$ black brane background, we analyze the time derivative of the Nambu-Goto (NG) action as the holographic dual to complexity growth. Our results indicate that the complexity growth is maximized for a stationary string and is suppressed by its motion. At fixed temperature, the stationary string complexity growth is independent of the GB coupling, whereas that of moving strings is suppressed by stronger $R^2$ corrections. Finally, the growth rate is shown to increase linearly with temperature, confirming that higher temperatures systematically drive the complexity growth.

hep-ph↗

arXiv2025

Complexity Growth in Flavor-Dependent Systems

In this work, we investigate holographic complexity growth in a flavor-dependent Einstein-Maxwell-Dilaton (EMD) model, where the parameters are determined through machine learning algorithms fitted to lattice QCD equation of state (EoS) and baryon number susceptibility data. Within the Complexity=Action (CA) conjecture, we introduce a probe string into the bulk geometry and evaluate the time derivative of its Nambu-Goto (NG) action on the Wheeler-DeWitt (WDW) patch as the holographic dual of complexity growth. Our analysis explores the dependence of complexity growth on string velocity, chemical potential, temperature, and the number of flavors. Results show maximum complexity growth for stationary strings, decreasing with string velocity. At zero chemical potential, complexity growth is largest in the pure gluon system and reduces with the addition of quark flavors. Increasing temperature and chemical potential consistently enhance complexity growth. Furthermore, complexity growth exhibits multi-valued behavior in regions corresponding to first-order transitions and single-valued behavior in crossover regimes, indicating that complexity can serve as a probe for phase transitions.

hep-ph↗

arXiv2025

Schwinger Effect in a Twice Anisotropic Holographic Model

In this work, we investigate the Schwinger effect in a twice anisotropic holographic QCD model that incorporates both spatial and magnetic anisotropies. Using the AdS/CFT correspondence, we calculate the total potential of a particle-antiparticle pair to evaluate how these anisotropies affect the holographic Schwinger effect. Our calculations reveal that the magnetic field, characterized by parameters $c_B$ and $q_3$, consistently enhances the Schwinger effect by lowering and narrowing the potential barrier. In contrast, increasing the spatial anisotropy, parameterized by $ν$, raises and widens the barrier, thereby suppressing the process. These findings suggest the significance of treating both anisotropies concurrently for a realistic description of particle production in HIC.

hep-ph↗

arXiv2024

Heavy quarkonium spectral function in an anisotropic background

In this paper, we use a five-dimensional Einstein-dilaton-two-Maxwell holographic QCD model to investigate the dissociation effects of $J/Ψ$ and $Υ(1S)$ states in an anisotropic medium by calculating their spectral functions. First, we present the holographic quarkonium masses at zero temperature via Physics-Informed Neural Networks. Then, at finite temperature, we derive the spectral functions, representing heavy vector mesons as peaks, and observe that with increasing anisotropy, temperature, chemical potential, and warp factor, the peak height diminishes while its width expands, indicating an accelerated dissociation process. Additionally, the results indicate the anisotropy induces a stronger dissociation effect in the direction parallel to the polarization compared to the perpendicular, revealing the anisotropy's directional influence.

hep-ph↗