2019/12/10 by Francisco M. Fernández, Fernández, Francisco M.
Physics and Astronomy · Computer Science · #Quantum Mechanics and Applications #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography
paper · pdf · doi:10.48550/arxiv.1912.04876
In this paper we discuss the validity of the Hellmann-Feynman theorem (HFT) for degenerate states. We derive it in a general way and apply it to simple illustrative examples. We also analyze a recent paper that shows results that apparently suggest that the HFT does not apply to degenerate states.