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Wick rotation and the positivity of energy in quantum field theory
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We propose a new axiom system for unitary quantum field theories on curved space-time backgrounds, by postulating that the partition function and the correlators extend analytically to a certain domain of complex-valued metrics. Ordinary Riemannian metrics are contained in the allowable domain, while Lorentzian metrics lie on its boundary.
Forward citations
Cited by 16 Pith papers
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Discrete quantum systems from topological field theory
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Selecting Complex Extremal Surfaces with the Kontsevich--Segal--Witten Criterion
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AdS Black Holes Are Short-Lived inside the Spectral Form Factor
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Constructs index saddle for D1-D5-P black string via BPS limit and uplift, with decoupling to BTZ x S^3 computing CFT index.
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Complex degenerate metrics in general relativity: a covariant extension of the Moore-Penrose algorithm
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Gravitational index of the D1-D5-P black string
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