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Paper 1
Celestial Quantum Error Correction II: From Qudits to Celestial CFT
Alfredo Guevara, Yangrui Hu
- Year
- 2024
- Journal
- arXiv preprint
- DOI
- arXiv:2412.19653
- arXiv
- 2412.19653
A holographic CFT description of asymptotically flat spacetimes inherits vacuum degeneracies and IR divergences from its gravitational dual. We devise a Quantum Error Correcting (QEC) framework to encode both effects as correctable fluctuations on the CFT dual. The framework is physically motivated by embedding a chain of qudits in the so-called Klein spacetime and then taking a continuum $N\to \infty$ limit. At finite $N$ the qudit chain 1) enjoys a discrete version of celestial symmetries and 2) supports a Gottesman-Kitaev-Preskill (GKP) code. The limit results in hard states with quantized BMS hair in the celestial torus forming the logical subspace, robust under errors induced by soft radiation. Technically, the construction leverages the recently studied $w_{1+\infty}$ hierarchy of soft currents and its realization from a sigma model in twistor space.
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Gravity from Transactions: Fulfilling the Entropic Gravity Program
A. Schlatter, R. E. Kastner
- Year
- 2022
- Journal
- arXiv preprint
- DOI
- arXiv:2209.04025
- arXiv
- 2209.04025
This is a review of new developments in entropic gravity in light of the Relativistic Transactional Interpretation (RTI). A transactional approach to spacetime events can give rise in a natural way to entropic gravity (in the way originally proposed by Erik Verlinde) while also overcoming extant objections to that research program. The theory also naturally gives rise to a Cosmological Constant and to Modified Newtonian Dynamics (MOND) and thus provides a physical explanation for the phenomena historically attributed to "dark energy" and "dark matter".
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