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The Role of Type $II_{\infty}$ v.Neumann Algebras and their Tensor Structure in Quantum Gravity}}

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arxiv 2501.06009 v1 pith:46TUVJKW submitted 2025-01-10 gr-qc hep-thmath-phmath.MP

classification gr-qchep-thmath-phmath.MP
keywords quantumtypegravityalgebraalgebrasinftyneumannrole
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abstract

We will argue in this paper that the type classification of v.Neumann algebras play an important role in a theory of quantum gravity and quantum space-time physics. We provide arguments that type $II_{\infty}$ and its representation as a tensor product of an ordinary (exterior) Hilbert space algebra $\cB(\cH_I)$ and an (internal) type $II_1$ algebra, encoding, in our view, the hidden microscopic gravitational degrees of freedom, do represent the first step away from the semiclassical picture towards a full theory of quantum gravity.

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  1. The Crossed Product, Modular (Tomita) Dynamics and its Role in the Transition of Type $III$ to Type $II_{\infty}$ v.Neumann Algebras and Connections to Quantum Gravity

    gr-qc 2025-07 reject novelty 3.0 of 10

    A review of Takesaki crossed product duality plus an unproven conjecture that modular Hamiltonian evolution of vacuum fluctuations is the microscopic mechanism of gravitational time dilation.

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