Quantum states whose particle content is invariant under bogoliubov transformation

Padmanabhan, T.2012-03-022012-03-021987-02-16http://hdl.handle.net/11007/95It is shown that, for any given Bogoliubov transformation, there exists a class of quantum states with the following property. The particle content of these states does not change under the Bogoliubov transformation. We emphasise the importance of such states in the study of quantum fields in curved spacetime.enQuantumBogoliubov transformationHarmonic oscillatorQuantum states whose particle content is invariant under bogoliubov transformationArticle