Speculative Model of Coupled Mirror Universes: A Conceptual Framework

This work presents a speculative cosmological model in which the cosmos is part of a global system composed of two mirror universes (A and B), symmetric and non-locally coupled. The system dynamics are described through alternating phases of expansion and contraction, with an effective transfer of global conditions (rather than local forces) between both universes. The observed accelerated expansion is interpreted as an emergent geometric effect of this global coupling, compatible with an effective cosmological constant . The model incorporates considerations on entropy, the arrow of time, and temporal symmetry, and employs physical analogies (membranes, bubbles, crossed springs, coupled pistons) as intuitive support. This record also includes the original Spanish version of the manuscript. Version 3 This version extends the conceptual framework presented in v2 through the addition of two appendices, without modifying the main body of the manuscript. A new appendix, “Conceptual Exploration and Human–AI Assisted Reasoning”, has been added to document the reflective process underlying the construction of the model, clarify its epistemic limits, and explicitly describe the role of human–AI interaction as a tool for conceptual refinement rather than theory generation. A second appendix, “Curvature and Higher-Dimensional Visualization”, introduces an extended geometric interpretation of the coupled mirror-universe system. This addendum elaborates on the notion of effective, state-dependent curvature, proposes a conceptual visualization of complementary open and closed geometries, and clarifies the interpretation of Big Bang–like events as antisymmetric geometric transitions (geometric expansion and contraction) rather than purely material processes. No changes have been made to the core assumptions, qualitative dynamics, or observational compatibility discussed in previous versions. Version 2This update introduces conceptual clarifications regarding(i) the indirect geometric mediation of gravitational dynamics between mirror universes, and(ii) global temporal desynchronization between expansion and contraction phases.No changes to the core framework or conclusions are introduced.