The question of whether the gravitational field
Research gap analysis derived from 3 physics papers in our local library.
The gap
The question of whether the gravitational field can be treated as a quantum field has not yet received a conclusive answer. The study of the response of a detector to classical and quantum gravitational fields is an open problem.
Evidence profile
Sourced from the limitations section and stated research gap of the source papers, classified as general, spanning 3 journals.
Research trend
Established — well-defined area with open sub-problems.
Supporting evidence — 3 representative gaps
- Instability thresholds for de Sitter and Minkowski spacetimes in holographic semiclassical gravity (2026) · Journal of High Energy Physics · doi
The authors assume that the spacetime is treated classically while matter fields are treated quantum mechanically. The analysis is limited to the framework of semiclassical gravity. The authors do not consider the backreaction of the quantum fields on the spacetime geometry.
generallimitations sectionevidence 5/5Keywords: authors assume spacetime treated classically matter fields quantum - Quantum Response of a Harmonically Trapped Detector to Classical and Non-classical Gravitational Fields (2026) · International Journal of Theoretical Physics · doi
The question of whether the gravitational field can be treated as a quantum field has not yet received a conclusive answer. The study of the response of a detector to classical and quantum gravitational fields is an open problem.
generalstated research gapevidence 5/5Keywords: question whether gravitational field treated quantum has received - Quantum fluctuations on the emergent curved spacetime: canonical quantization of the Chebyshev–LQG network (2026) · Zenodo (CERN European Organization for Nuclear Research) · doi
The paper identifies the need to promote the emergent metric perturbation uµν from a classical c-number field to a quantum operator. The paper addresses the gap between classical emergent general relativity and quantum field theory in curved spacetime.
generalstated research gapevidence 5/5Keywords: paper identifies need promote emergent metric perturbation classical
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