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Classical statistical simulation of quantum field theory
We propose a procedure of computing the n-point function in perturbation theory of the quantum field theory as the average over the complex Gaussian...
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Non-trivial Bundles and Algebraic Classical Field Theory
Inspired by the recent algebraic approach to classical field theory, we propose a more general setting based on the manifold of smooth sections of a...
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Classical double copy of spinning worldline quantum field theory
We study the classical double copy of massive spinning objects in the worldline quantum field theories (WQFT) formalism. We couple the
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3 Symmetries in Classical Field Theory
As the previous discussion indicates, it is impossible to realize the phenomenon of (spontaneous) breaking of a continuous symmetry in classical...
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Observables from classical black hole scattering in Scalar-Tensor theory of gravity from worldline quantum field theory
In this paper, we compute the two observables, impulse and waveform, in a black hole scattering event for the Scalar-Tensor theory of gravity with a...
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The classical cosmological constant of open-closed string field theory
We consider deformations of D-brane systems induced by a change in the closed string background in the framework of bosonic open-closed string field...
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Classical and quantum cosmology for two scalar field Brans–Dicke type theory: a Noether symmetry approach
The paper deals with a cosmological model containing two scalar fields which can be considered as an extension of the Brans–Dicke scalar field model....
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Effective Field Theory and Applications
In this chapter, we will review the field-theoretic treatment of general relativity based on an effective field theory extension of the...
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The weak field limit of quantum matter back-reacting on classical spacetime
Consistent coupling of quantum and classical degrees of freedom exists so long as there is both diffusion of the classical degrees of freedom and...
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Lagrangian Theory of Classical Fields
Instead of a regular introduction to the theme Classical Fields, this chapter can be seen as a continuation of Chap. 1...
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Geometric Phase of a Two-level System Driven by a Classical Field
We investigated the mixed state geometric phase of a two-level system which is coupled to a bosonic reservoir in both weak and strong coupling...
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Bootstrap** closed string field theory
The determination of the string vertices of closed string field theory is shown to be a conformal field theory problem solvable by combining insights...
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Quantum Field Theory
This chapter covers the essentials of quantum field theory. Topics discussed include the curvature of gauge fields and the definition of the...
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Unfolded dynamics approach and quantum field theory
We study quantization of a self-interacting scalar field within the unfolded dynamics approach. To this end we find and analyze a classical unfolded...
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Yang–Mills field strength and classical trajectories of electrons in Rashba spin–orbit-coupled systems
It is a long standing issue how non-Abelian entities take shape in macroscopic real space and are measured technically. Based on the gauge theory...
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Effective brane field theory with higher-form symmetry
We propose an effective field theory for branes with higher-form symmetry as a generalization of ordinary Landau theory, which is an extension of the...
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Spin supplementary condition in quantum field theory: covariant SSC and physical state projection
The spin supplementary conditions are constraints on spin degrees of freedom in classical relativity which restricts physical degrees of freedom to...
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Open-closed string field theory in the large N limit
We use the new nilpotent formulation of open-closed string field theory to explore the limit where the number N of identical D-branes of the starting...
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Quantum Scalar Field Theory Based on an Extended Least Action Principle
Recently it is shown that the non-relativistic quantum formulations can be derived from an extended least action principle Yang (2023). In this...