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Open research questions in Quantum Electrodynamics and Casimir Effect

113 gap statements mined from Quantum Electrodynamics and Casimir Effect papers in our 4.5M-paper local library, which holds 371 papers on the topic — drawn mostly from each paper's own stated research gap, future-work, challenge and limitation notes, and its abstract. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one.

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What the literature leaves open

  • The QOGRM model is limited to small values of the gravitational redshift. The model's assumption that all unwanted degrees of freedom can be collected in one environment mode is violated.

    Limits to the Validity of Gravitational Redshift as a Quantum-optical Multimode Mixer · 2026 · DOI

  • The paper notes that the AM threshold hypothesis remains viable and testable until the 100-1000 amu mass region is systematically mapped in high-precision interferometry. The paper suggests that intrinsic decoherence channels need to be fully isolated and characterized.

    Energetic Thresholds for the Quantum–Classical Transition: The Absolute Medium Framework · 2026 · DOI

  • The paper addresses the need for a modified Feynman-diagrammatic approach.

    Decay of a scalar condensate in two different approaches · 2026 · DOI

  • The model is based on a simplified framework and may not capture all the complexities of the real world. The paper relies on numerical simulations and may be subject to numerical errors or limitations. The model may require further development and refinement to fully account for all phenomena.

    Unified Quantum Elastic Spacetime and Emergent Standard Model from TopologicalSolitons:Induced Gravity, Ghost-Free Dynamics, NonPerturbative QED & QCD, Dark Sector, and Gravitational-Wave Echoes · 2026 · DOI

  • The H0 tension and the scale hierarchy problem are not satisfactorily explained by prior models. A novel resolution is needed to address these complex observations.

    HIGM v0.4: Towards a Unified Field Theory - Higgs Vacuum and Gravitational Synthesis · 2026 · DOI

  • The paper suggests that future research should investigate dissipative effects in gravity. The paper suggests that future research should apply the results to the study of open quantum and classical systems.

    Emergent structures and consistency of open EFTs · 2026 · DOI

  • Future research could investigate the effects of other types of interactions on the stability of Dyson shells. The study's findings could be used to inform the development of more advanced models of Dyson shells and their stability. Further research could explore the implications of the study's results for the search for extraterrestrial intelligence (SETI) and the detection of large energy-harnessing structures.

    Stability of neutral and charged Dyson shells around Reissner-Nordström compact objects · 2026 · DOI

  • Prior research has focused on the stability of Dyson shells surrounding uncharged objects, leaving a gap in the analysis of charged objects.

    Stability of neutral and charged Dyson shells around Reissner-Nordström compact objects · 2026 · DOI

  • Future research should focus on generalizing the framework to arbitrary mirrored fractal boundaries. Future research should aim to derive a rigorous first-principles computation of the local renormalized stress-energy tensor.

    Effective trace framework for self-similar Casimir systems · 2026 · DOI

  • The classical theory of electromagnetism has limitations, particularly in the presence of divergences at small scales. Prior work on the Stefan-Boltzmann law and the Casimir effect does not account for the effects of Podolsky electrodynamics.

    Thermal and spatial confinement effects in Podolsky electrodynamics · 2026 · DOI

  • The paper does not provide an analytic derivation of the phenomena studied. The study is limited to non-abelian gauge theories. The paper does not discuss the implications of the results for other areas of physics.

    Properties of the quantum vacuum in non-abelian gauge theories · 2026

  • The study highlights the need for non-perturbative methods to analyze the dependence of the vacuum energy on boundary conditions.

    Properties of the quantum vacuum in non-abelian gauge theories · 2026

  • In fact, an open question in GFT cosmology is how to describe and understand beyond mean-field effects at both the mathematical and physical levels.

    Collective excitations in quantum gravity condensates · 2026

  • Further study of the connection between decoherence and black hole thermodynamics is needed. Investigation of the role of entangling photons in other decoherence processes may be fruitful.

    On the nature of entangling photons in horizon-induced decoherence · 2026

  • The divergence of the Lorentz factor as a system approaches the luminal limit. The lack of a theoretically consistent resolution to the singularities of classical relativity.

    On the Thermodynamic Origins of the Lorentz Factor: Resolving High-Energy Divergences via Planck-Boltzmann Thermal Saturation · 2026 · DOI

  • The analysis aims to provide the missing theoretical link between the conceptual description of vacuum processes and the observational tests of vacuum-tension dynamics.

    The Breathing Universe: 707_From Vacuum Processes to Effective Field Theory · 2026 · DOI

  • The fundamental origin of mass, time, and gravitation remains obscure. The question remains whether mass is a primitive quantity or the manifestation of a deeper geometric structure.

    Mass, Gravity, and Atomic Structure from the Geometry of Null Orientation Fields · 2026 · DOI

  • The model aims to provide a unified approach to understanding the fundamental laws of physics, including emergent spacetime, induced Einstein gravity, and the full Standard Model.

    Unified Quantum Elastic Spacetime and Emergent Standard Model from TopologicalSolitons:Induced Gravity, Ghost-Free Dynamics, NonPerturbative QED & QCD, Dark Sector, and Gravitational-Wave Echoes · 2026 · DOI

  • The ERG flow equation for the Wilson action is a non-linear functional differential equation. There is no fundamental issue on the gauge symmetry in ERG, but finding a solution to the ERG flow equation is a serious problem.

    Gauge invariant non-perturbative Wilson action in quantum electrodynamics · 2026 · DOI

  • We have constructed a fully covariant, ghost-free field-theoretic framework in which low-acceleration departures from Newtonian gravity arise from a nonlinear stiffness response of the vacuum itself.

    A Covariant Field Theory of Vacuum Stiffness for Low-Acceleration Gravity (Quantum Vacuum Composite Stiffness Response) · 2026 · DOI

  • Several developments remain essential: Numerical construction and stability analysis of Qvion solutions. Time-dependent and environmental simulations to quantify coherence and relaxation effects. Precision observational tests across galaxy samples and wide-binary catalogs. Fully covariant cosmological solutions of the stiffness sector.

    A Covariant Field Theory of Vacuum Stiffness for Low-Acceleration Gravity (Quantum Vacuum Composite Stiffness Response) · 2026 · DOI

  • Further analysis of the QOGRM model's limitations and potential extensions. Experimental validation of the model's predictions for small values of the gravitational redshift.

    Limits to the Validity of Gravitational Redshift as a Quantum-optical Multimode Mixer · 2026 · DOI

  • Systematic mapping of the 100-1000 amu mass region in high-precision interferometry. Characterization of intrinsic decoherence channels. Experimental testing of the Absolute Medium framework.

    Energetic Thresholds for the Quantum–Classical Transition: The Absolute Medium Framework · 2026 · DOI

  • Further study of the decay rate of scalar condensates using the two approaches. Application of the results to other fields of physics. Investigation of the implications for cosmology.

    Decay of a scalar condensate in two different approaches · 2026 · DOI

  • Further study of the implications of Podolsky electrodynamics on other physical phenomena. Application of the TFD formalism to other areas of physics, such as quantum field theory and condensed matter physics. Investigation of the effects of Podolsky electrodynamics on the behavior of particles at high energies.

    Thermal and spatial confinement effects in Podolsky electrodynamics · 2026 · DOI

Most-cited papers in Quantum Electrodynamics and Casimir Effect

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Open questions raised by papers listed on this page include: (1) A novel resolution is needed to address these complex observations (“HIGM v0.4: Towards a Unified Field Theory - Higgs Vacuum and Gravitational…”, 2026); (2) The paper suggests that future research should investigate dissipative effects in gravity (“Emergent structures and consistency of open EFTs”, 2026); (3) Future research could investigate the effects of other types of interactions on the stability of Dyson shells (“Stability of neutral and charged Dyson shells around Reissner-Nordström compact…”, 2026); (4) Future research should focus on generalizing the framework to arbitrary mirrored fractal boundaries (“Effective trace framework for self-similar Casimir systems”, 2026); (5) The lack of a theoretically consistent resolution to the singularities of classical relativity (“On the Thermodynamic Origins of the Lorentz Factor: Resolving High-Energy…”, 2026). 113 gap statements have been mined from Quantum Electrodynamics and Casimir Effect papers in our 4.5M-paper local library, which holds 371 papers on the topic; the gaps come from whichever of those papers state one. They are mostly the research gaps the authors state and the papers' abstracts, plus future-work, limitations and challenges passages. The ones listed below are a selection still marked open; each names the study that raised it, with a DOI link where the paper has one, so you can read the original claim in context.

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