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Universe, 2023 This Special Issue on quantum field theory presents work covering a wide and topical range of subjects mainly within the area of interacting 4D quantum field theories subject to certain backgrounds [...]
Ralf Hofmann
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Classical Gravitational Bremsstrahlung from a Worldline Quantum Field Theory. [PDF]
Physical Review Letters, 2021 Using the recently established formalism of a worldline quantum field theory description of the classical scattering of two spinless black holes, we compute the far-field time-domain waveform of the gravitational waves produced in the encounter at ...
Gustav Uhre Jakobsen +3 more
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Wick Rotation and the Positivity of Energy in Quantum Field Theory [PDF]
Quarterly Journal of Mathematics, 2021 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.
M. Kontsevich, G. Segal
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A detector-based measurement theory for quantum field theory [PDF]
Physical Review D, 2021 We propose a measurement theory for quantum fields based on measurements made with localized non-relativistic systems that couple covariantly to quantum fields (like the Unruh-DeWitt detector). Concretely, we analyze the positive operator-valued measure (
Jos'e Polo-Gom'ez +2 more
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Linear Superposition as a Core Theorem of Quantum Empiricism
Universe, 2022 Clarifying the nature of the quantum state |Ψ⟩ is at the root of the problems with insight into counter-intuitive quantum postulates. We provide a direct—and math-axiom free—empirical derivation of this object as an element of a vector space ...
Yurii V. Brezhnev
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Quantum Algorithms for Quantum Field Theories [PDF]
Science, 2012 Quantum Leap? Quantum computers are expected to be able to solve some of the most difficult problems in mathematics and physics. It is not known, however, whether quantum field theories (QFTs) can be simulated efficiently with a quantum computer.
Jordan, Stephen P. +2 more
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Quantum scars in quantum field theory
Physical Review D, 2023 We develop the theory of quantum scars for quantum fields. By generalizing the formalisms of Heller and Bogomolny from few-body quantum mechanics to quantum fields, we find that unstable periodic classical solutions of the field equations imprint themselves in a precise manner on bands of energy eigenfunctions.
Jordan Cotler, Annie Y. Wei
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APS Medal for Exceptional Achievement in Research: Invited article on entanglement properties of quantum field theory [PDF]
Reviews of Modern Physics, 2018 The 2016 APS Medal for Excellence in Physics was given to Edward Witten. This contribution was invited in conjunction with this award. These original notes contain concise explanations of some key results in the axiomatic and algebraic approaches to ...
E. Witten
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Journal of High Energy Physics, 2022 Although the mathematics of anyon condensation in topological phases has been studied intensively in recent years, a proof of its physical existence is tantamount to constructing an effective Hamiltonian theory. In this paper, we concretely establish the
Yuting Hu +3 more
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Energy conditions in general relativity and quantum field theory [PDF]
Classical and quantum gravity, 2020 This review summarizes the current status of the energy conditions in general relativity and quantum field theory. We provide a historical review and a summary of technical results and applications, complemented with a few new derivations and discussions.
Eleni-Alexandra Kontou, Ko Sanders
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