The Observer Paradigm in Semiclassical Gravity: A Postmodern Perspective
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arXiv
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| Format: | Preprint |
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2026
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| _version_ | 1866908927859359744 |
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| author | McBride, Sean |
| author_facet | McBride, Sean |
| contents | Recent advances in semiclassical gravity, both in our understanding of the gravitational path integral and the algebraic structure of a gravitating subregion, rely on the presence of an observer to obtain a nontrivial Hilbert space for closed universe backgrounds. Here I examine this proposal from a postmodern lens, identifying attempts to define ``observer rules'' as manifestations of metanarrative breakdown: the observer both supplies and undermines the perturbative gravitational Hilbert space. Rather than resolving this tension, I advocate for a post-postmodern acceptance of the incompatibility between observer-dependent and observer-free descriptions of closed universes, treating the ambiguity as a feature of quantum gravity's fundamental degrees of freedom. To my knowledge, this is the first reference to post-postmodernism in concert with physics. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2604_00139 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | The Observer Paradigm in Semiclassical Gravity: A Postmodern Perspective McBride, Sean High Energy Physics - Theory General Relativity and Quantum Cosmology History and Philosophy of Physics Recent advances in semiclassical gravity, both in our understanding of the gravitational path integral and the algebraic structure of a gravitating subregion, rely on the presence of an observer to obtain a nontrivial Hilbert space for closed universe backgrounds. Here I examine this proposal from a postmodern lens, identifying attempts to define ``observer rules'' as manifestations of metanarrative breakdown: the observer both supplies and undermines the perturbative gravitational Hilbert space. Rather than resolving this tension, I advocate for a post-postmodern acceptance of the incompatibility between observer-dependent and observer-free descriptions of closed universes, treating the ambiguity as a feature of quantum gravity's fundamental degrees of freedom. To my knowledge, this is the first reference to post-postmodernism in concert with physics. |
| title | The Observer Paradigm in Semiclassical Gravity: A Postmodern Perspective |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology History and Philosophy of Physics |
| url | https://arxiv.org/abs/2604.00139 |