• Celebrating 10 Years of Excellence

    Celebrating 10 Years of Excellence

    The International Journal of Quantum Foundations (IJQF) is a quarterly, peer-reviewed, open-access online journal dedicated to advancing research and discourse in the conceptual and mathematical foundations of quantum theories. Launched… Read more →

Weekly Papers on Quantum Foundations (28)

The Geometry of Quantum Complexity in Open Systems IJQF Weekly Papers • quant-ph updates on arXiv.org / 20h arXiv:2607.08411v1 Announce Type: new Abstract: We extend Nielsen’s geometric approach for quantum complexity from closed to open quantum systems, whose dynamics is governed by Lindbladian evolution. In this framework, complexity is defined through an optimal-control problem on the space of mixed states, with a… Read more →

Weekly Papers on Quantum Foundations (27)

Quantum Noncommutativity Uniquely Determines Relative Entropy IJQF Weekly Papers • quant-ph updates on arXiv.org / 22h arXiv:2607.01712v1 Announce Type: new Abstract: Quantum relative entropy is a core concept in physics, governing the limits of communication, thermodynamic irreversibility and quantum resource conversion. However, the requirement that physical processes cannot increase state distinguishability, the data-processing inequality, permits an infinite family of alternative divergence measures…. Read more →

Weekly Papers on Quantum Foundations (26)

On the simple derivation of the Casimir effect IJQF Weekly Papers • quant-ph updates on arXiv.org / 22h arXiv:2606.26946v1 Announce Type: new Abstract: The Casimir effect in its simplest form describes the attraction of two parallel conducting plates at close distance due to the vacuum fluctuation of the electromagnetic field. Its derivation can be found in many introductory works on quantum optics…. Read more →