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Snowmass white paper: Quantum information in quantum field theory and quantum gravity
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We present a summary of recent progress and remaining challenges in applying the methods and ideas of quantum information theory to the study of quantum field theory and quantum gravity. Important topics and themes include: entanglement entropy in QFTs and what it reveals about RG flows, symmetries, and phases; scrambling, information spreading, and chaos; state preparation and complexity; classical and quantum simulation of QFTs; and the role of information in holographic dualities. We also highlight the ways in which quantum information science benefits from the synergy between the fields.
Forward citations
Cited by 3 Pith papers
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Quantum Fisher information of the Klein--Gordon, $\phi^4$, and Dirac vacua
Vacuum quantum Fisher information versus mass scales as m^{d-2} for free Klein–Gordon fields, diverges or shrinks under ϕ⁴ interactions, and is UV-divergent or zero for free Dirac fields depending on dimension.
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Entanglement production in the Sachdev-Ye-Kitaev Model and its variants
Entanglement production rates distinguish the spin-SYK model from fermionic SYK and binary SYK, and the differences only become visible at larger system sizes.
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Relative entropy of single-mode squeezed states in Quantum Field Theory
The paper derives a closed-form expression for the relative entropy of single-mode squeezed states in wedge regions, proportional to the smeared Pauli-Jordan distribution.
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