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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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Quantum Theory of the Scalar Free Field
In this chapter we discuss a quantization of the classical relativistic scalar field. The scalar field as a relativistic wave function was proposed...
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An algebraic formula for two loop renormalization of scalar quantum field theory
We find a general formula for the two-loop renormalization counterterms of a scalar quantum field theory with interactions containing up to two...
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The Real Scalar Quantum Field Theory
In this chapter we will examine an example of a relativistic quantum field theory. It contains a single, real scalar field and it will have spacetime...
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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...
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From locality to irregularity: introducing local quenches in massive scalar field theory
In this paper, we initiate the study of operator local quenches in non-conformal field theories. We consider the dynamics of excited local states in...
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Scalar field, nucleon structure and relativistic chiral theory for nuclear matter
The work that Peter Schuck and I carried out during the nineties in collaboration with the Lyon and Darmstadt theory groups is summarized. I retrace...
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Hydrodynamic and non-hydrodynamic excitations in kinetic theory — a numerical analysis in scalar field theory
Viscous hydrodynamics serves as a successful mesoscopic description of the Quark-Gluon Plasma produced in relativistic heavy-ion collisions. In order...
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Quantum computation of phase transition in interacting scalar quantum field theory
It has been demonstrated that the critical point of the phase transition in scalar quantum field theory with a quartic interaction in one space...
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Interacting Quantum Scalar Field Theory on a Causal Set
We introduce ϕ4 interacting real scalar quantum field theory (QFT) on causal sets. We consider both the canonical framework of causal set free QFT,...
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Free scalar field theory on a Sobolev space over a bounded interval
This paper discusses several functional analytic issues relevant for field theories in the context of the Hamiltonian formulation for a free,...
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Asymptotic scalar field cosmology in string theory
Asymptotic (late-time) cosmology depends on the asymptotic (infinite-distance) limits of scalar field space in string theory. Such limits feature an...
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Scalar field in unimodular f(R, T) theory
In this paper, we are fundamentally interested in minimally coupled scalar field as source of unimodular Friedmann–Robertson–Walker (FRW) spacetime....
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Casimir effect in a Lorentz-violating tensor extension of a scalar field theory
This paper investigates the Casimir energy modifications due to the Lorentz-violating CPT-even contribution in an extension of the scalar QED. We...
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Leading all-loop quantum contribution to the effective potential in general scalar field theory
The RG equation for the effective potential in the leading log (LL) approximation is constructed which is valid for an arbitrary scalar field theory...
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Nonlinear instability and scalar clouds of spherical exotic compact objects in scalar-Gauss-Bonnet theory
In this work, we present a new type of scalar clouds supported by spherically symmetric horizonless compact objects in the scalar-Gauss–Bonnet...
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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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Self-gravitating Higgs field of scalar charge
AbstractWe study the self-gravitating Higgs field of a scalar charge. We show that in the zeroth and first approximation in the smallness of the...
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Correlation functions of scalar field theories from homotopy algebras
We present expressions for correlation functions of scalar field theories in perturbation theory using quantum A ∞ algebras. Our expressions are...
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Gravitational Collapse of a Spherical Scalar Field
Examining the relativistic collapse of a spherical spacetime where gravity is coupled with a scalar field, this review provides a thorough analysis...