Research5

Publications & preprints

Our written output — preprints, peer-reviewed papers, technical notes, and theses. Most work is openly available, and we planned to keep that stance into the future, per the philosophy and the elective commitment thereof for that constitutes the model of RHINELAB.

2026

  • Preprint Foundational MTAIL

    Encoding-Modelling Theory (AET): A Pre-formal Theory of Modelling

    Bui Gia Khanh

    Zenodo preprint · 2026

    A precursor formulation of Ambiance-Encoding Theory (AET), proposing a framework that separates empirically accessible physical systems (the ambiance space) from their formal descriptions (the encoding space). It identifies three interconnected validation requirements — explicit ambiance specification independent of formalism, encoding justification grounded in ambiance rather than mathematical convenience, and systematic classification of structures as ambiance-invariant or encoding artefacts — addressing a foundational gap between operationalisation and description.

  • Preprint Physics MAPR

    Quantum Theory of the Ettingshausen Effect in Quantum Wells: A Review

    Khoa Duong, Bui Gia Khanh

    Zenodo preprint · 2026

    Using the quantum kinetic equation method, this review investigates electron transport in low-dimensional systems under the simultaneous influence of a magnetic field, a static electric field, and a laser field. It derives an explicit analytical expression for the Ettingshausen coefficient and clarifies electron–optical-phonon scattering mechanisms. For GaAs/GaAsAl quantum wells the effect is enhanced relative to bulk semiconductors as a consequence of quantum confinement, with a non-linear dependence on temperature and laser frequency.

  • Preprint Foundational MTAIL

    Artificial Intelligence — On Philosophical Arguments, Technical and General Landscape

    Bui Gia Khanh

    Zenodo preprint · 2026

    An introductory examination of artificial intelligence that traces its intellectual roots, from questions of rationality and intelligence in the philosophy of mind through to the 20th-century computational shift from "philosophical debate with no ends, to actual reverse engineering and implementation." A historical survey of the term's development and its conceptual precursors.

  • Preprint Physics MAPR

    Quantum Well Structure and Nonlinear Absorption Interaction: A Review

    Bui Gia Khanh, Ngoc Duong Khoa, Nguyen Duc Phung

    Zenodo preprint · 2026

    A review of quantum wells and the systems built on them — the foundational reasoning behind the model and its physical interpretation. It examines nonlinear absorption effects across quantum-well configurations, including half-parabolic, asymmetric, and finite variants, with and without perpendicular electric fields, and traces the historical development of quantum-well concepts and low-dimensional restrictive well geometries.

2025

  • Preprint Foundational MTAIL

    Foundations of Artificial Intelligence Frameworks: Notion and Limits of AGI

    Bui Gia Khanh

    arXiv preprint · 2025

    We argue that artificial general intelligence cannot emerge from current neural network paradigms regardless of scale. Drawing on the Chinese Room and Gödelian arguments, neuroscience, computer science, and learning theory, we contend that neural networks are architecturally insufficient for genuine understanding — static function approximators of a limited encoding framework, a "sophisticated sponge." We critique foundations the field relies on, distinguish existential facilities (computational substrate) from architectural organisation (interpretive structures), and outline what genuine machine intelligence would require.