Journal of Physics: Theories and Applications (cited as J. Phys.: Theor. Appl.) is an open-access, peer-reviewed journal published twice a year by the Department of Physics, Universitas Sebelas Maret. The journal provides a scholarly platform for research in theoretical and applied physics, with particular emphasis on theoretical and mathematical approaches, as well as physics-based applications addressing contemporary scientific and technological problems.

The journal welcomes original research that advances theoretical or mathematical understanding in physics through analytical, computational, numerical, and modeling approaches, as well as research that applies physical theories, models, experimental methods, or quantitative approaches to relevant scientific and technological challenges. The journal also considers interdisciplinary research, including studies related to materials, energy, environmental and Earth sciences, biomedical and health sciences, engineering and technology, and sustainable or natural-resource-based materials and applications, provided that physics constitutes a substantive and identifiable component of the research.

The journal serves researchers, academics, professionals, graduate students, and other members of the international physics community. Through its focus on theoretical foundations, applied physics, and relevant interdisciplinary applications, the journal aims to facilitate the dissemination of rigorous, scientifically meaningful, and relevant research that contributes to the development and application of physics.