Quantum Field Theory In Curved Spacetime: Quant... Apr 2026

: A second observer might decompose the same field using a different basis and operators Mixing : The new annihilation operator

) will contain a non-zero number of particles according to the second observer. 3. Key Phenomena Quantum Field Theory in Curved Spacetime: Quant...

: The concept of a "particle" becomes local and observer-dependent. Different observers (e.g., one inertial and one accelerating) may disagree on whether a state contains particles or is a vacuum. : A second observer might decompose the same