Vol. 141, No. 1-3, 2025

Journal of Experimental and Theoretical Physics

A Possible Resolution to the Modified Version of the Multispring System Paradox

M. Javanshiry p. 1 abstract

Advances in Metasurfaces for Realization of Photodetector Performance Enhancement

C. Liu, H. Z. Feng, M. N. Gu, Y. Tian, and T. Q. Zhao p. 8 abstract

Analytical Soliton Solutions to the Dual-Mode Fourth-Order Nonlinear Schrödinger Equation Governed by a Parabolic Law

S. S. Mahmood and M. A. S. Murad p. 22 abstract

Thermodynamics of Black and White Holes in Ensemble of Planckons

G. E. Volovik p. 32 abstract

Stability of Networks of Heterogeneous Stuart–Landau Oscillators with Nonlinear Global Coupling

R.-S. Kim, J.-S. Kang, and Ch.-U. Choe p. 41 abstract

Study of Gain Enhancement by Managing Betatron Oscillations Using Multi-Stage Optical Klystrons in Free Electron Lasers

A. Gajbhiye and D. Jain p. 54 abstract

Photoluminescence Investigations on Dy³⁺ Activated CdO–Bi₂O₃–ZnO Phosphate Glasses

D. Ganesh, Ch. Anjaneyulu, N. Chandana, L. Krishna Kishore Babu, and G. Giridhar p. 63 abstract

Theoretical Investigation of Gibbs Free Energy, Enthalpy, and Specific Heat of Nitrogen Using Pseudoharmonic Plus Kratzer Potential

A. Ghanbari p. 71 abstract

Bi-2212 Heterostructures: Proximity Effects and Electronic Modifications for Enhanced Superconductivity

L. Mahapatra, P. P. Parida, and K. L. Mohanta p. 80 abstract

Virtual Photons and π⁰-η-η' Mixing

A. A. Osipov p. 103 abstract

Atomic and Electronic Structure of Defect Ni Complexes and Oxygen Vacancies in HfO₂ and Their Influence on Charge Transport in Memristors

T. V. Perevalov, D. R. Islamov, and A. A. Chernov p. 113 abstract

Performance Assessment of a New Perforated-Plate Flow Conditioner Versus the Zanker Design: An Experimental Approach

T. Saibi, M. Belharizi, B. Chetti, M. Lounis, and T. Yahiaoui p. 120 abstract

Stability Analysis of the Nematodynamics Equation for the Director

A. V. Golovanov and V. I. Shapovalov p. 128 abstract