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Tutorials, schools, and workshops in the mathematical sciences

Re-evaluating Space-Time

A. J. Short

Published Jan 1, 2017• 0 citations
Publisher
DOI
10.1007/978-3-319-68655-4_4

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Contemporary discussions of temporal displacement frequently conflate physical motion through spacetime with changes in temporal reference. This paper proposes a theoretical observer framework in which temporal access is achieved not through spatial traversal or superluminal transport, but through re‑indexing of an observer’s temporal validation state within fixed space, dimension, and presence. Drawing on the experimentally demonstrated existence of time‑translation symmetry breaking in time crystals, we model time as a discretely addressable validation layer rather than a continuous transport medium. Causality is explicitly constrained to read‑only, ensuring non‑participatory observation and preventing paradoxes or timeline modification. While no physical implementation is proposed, the framework identifies prospective experimental signatures related to temporal coherence and synchronization that may offer indirect avenues for evaluation.
The equilibrium dynamics of the spin-1/2 XX chain is re-examined within a recently developed formalism based on the quantum transfer matrix and a thermal form factor expansion. The transversal correlation function is evaluated in real time and space. The high-accuracy calculation reproduces several exact results in limiting cases as well as the well-known asymptotic formulas obtained by the matrix Riemann-Hilbert approach. Furthermore, comparisons to numerical data based on a direct evaluation of the Pfaffian as well as to asymptotic formulas obtained within non-linear Luttinger liquid theory are presented.