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Physics

Questions tagged [qft-in-curved-spacetime]

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Quantum field theory in curved spacetime (QFTCS) is a field of study that focuses on problems that arise when considering a quantum field on a fixed, curved spacetime. It allows the study of quantum effects in strong gravitational fields, and has led to many interesting conclusions, such as the Unruh effect and the Hawking effect.

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I have been studying the Higgs mechanism, and most standard derivations assume flat Minkowski spacetime.However, in the early universe or near compact objects such as black holes, spacetime curvature ...
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In section V of this paper, the author computes $\langle F_{\mu \nu} F^{\mu \nu} \rangle$. Using the definition of $F_{\mu \nu}$ it is not difficult to show that$$\langle F_{\mu \nu} F^{\mu \nu}\...
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I have been studying the Dirac equation in curved spacetime, with the Lagrangian$$L=\Psi^{\dagger} \gamma^{0}(i\gamma^{\mu} D_{\mu} -m) \Psi$$(I think, however, I have seen it without the $\Psi^{\...
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I have recently been studying how the temperature of a black hole can be obtained using the Wick rotation technique, but I am struggling with its physical interpretation. Let me outline my main ...
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I research cosmological perturbations in modified gravity so i need write Hamiltonian for perturbed scalar field, but in literature there is different ways to get it.Mukhanov consider 2 actions: for ...
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I am struggling a bit to understand the Quantum to Classical transition in QFT in an expanding universe. I want to compute the quantum expectation value of the classical quantity $\vec{E}\cdot\vec{B}$...
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hello i'm fully aware that I'm trying to understand some very high-grade theoretical physics with my low level knowledge gained in my teenage years at school But I do understand the following:it is ...
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According to Stephen Hawking black holes evaporate very slowly due to constant emission of particle and antiparticle pairs at event horizon.This phenomenon is explained that if black hole captures ...
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I am coming from a mathematics background. I have been reading through Lectures on Quantum Mechanics by Paul A.M. Dirac, where he develops his relativistic base of quantum mechanics through quantizing ...
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In this essay named "Shape Dependence of Holographic Renyi Entropy in Conformal Field Theories", the author claim that the Renyi entropy in $4D$ CFT in curved spacetime can be calculated ...
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Is the following statement true?If a vector $|\Psi\rangle$ in a bosonic Fock space gives rise to a quasi-free, pure algebraic state on the CCR $\ast$-algebra, then $|\Psi^{(2n+1)}\rangle=0$ for all $...
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Scenario Recap:A small black hole (near evaporation) falls inside a larger black hole.The small one would normally evaporate via Hawking radiation and its quantum entanglement structure is critical ...
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I'm currently trying to understand scalar field quantization on curved spacetimes and i'm stuck at the choice of commutation relations.The equal time commutator of the field and it's conjugate it's ...
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When a black hole exists in some region of spacetime, we know its density is big enough to make it curve infinitely into a point of singularity. Then there should be a region inside the event horizon ...
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I am trying to find a reference for massive $U(1)$ or "massive photon" during inflation (or de Sitter space) that derives or at least shows the mode functions for massive photon (with the ...

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