What you described is, more or less, the state of the art of the end of eighties. That is, a theory describing the physics (and the geometry) at Planck. It is not necessary to require the existence of an (even asymptotic) timlike Killing vector to define physically meaningful states thank to the class of Hadamard states. It doesnt react to the state of the quantum fields, which are described by operators on a Hilbert space. QFT in curved spacetime can be defined in every globally hyperbolic spacetime.
Quantum field theory in curved space time plus#
The resulting emergent gravity plus renormalized QFT setup has the potential to reveal itself in various astrophysical, cosmological and collider phenomena. QFT in curved spacetime: The spacetime metric is fixed. We also find that gravity emerges at the extremum if the QFT under concern consists of new particles beyond the known ones. The theory of quantized fields in curved spacetime has reached a high level of development, and a number of important physical consequences have been. The driven harmonic oscillator is a lower.
In the case of Poincare-breaking UV cutoff, however, we find that the flat spacetime affine curvature takes the place of the Higgs field and, when taken to curved spacetime, gauge symmetry gets restored at the extremum of the metric-affine action. In Quantum Field Theory in Curved Spacetime, a time-varying background metric leads to particle production. In the case of Poincare-conserving UV cutoff, we find that the gauge symmetry gets restored via the Higgs mechanism. The strong analogy between states defined in the context of quantum field theory in curved space-time (QFT-CST) and the ones defined in the thermo field dy. In the present work, we perform a systematic study of the UV cutoff in regard to its gauge and Poincare properties, and construct UV completions restoring the broken gauge symmetry. And the very same cutoff can explicitly break or conserve the gauge symmetry. Recent theoretical developments indicate that the presence of gravity (curved spacetime) can give rise to important new quantum effects, such as cosmological particle production and. It is also one of a kind in its unprecedented scope, providing a much needed unifying view of the field.The ultraviolet (UV) cutoff on a quantum field theory (QFT) can explicitly break or conserve the Poincare (translation) symmetry. Quantum eld theory in curved spacetime has been remarkably fruitful. This workshop will be a unique opportunity to bring together different branches of theoretical physics (Astrophysics, cosmology, mathematical physics, etc.) around a key cornerstone such as QFTCS. Since the seminal papers about particle creation in an expanding Universe by Leonard Parker (1968) and the discovery of quantum radiation by Black Holes by Stephen Hawking (1975), Quantum Field Theory in Curved Space-time (QFTCS) has achieved many advances in both its technical conceptualization and in its applications to cosmology and astrophysics. Quantum field theory predicts a number of unusual physical effects in non-Minkowskian manifolds (flat or curved) that have no immediate analogs in Minkowski. More info: external link Date: - Contact: Location: Online
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