Phase Transitions, Two-Level Atoms, and the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>A</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>Term 论文

摘要

We show that the presence of the recently discovered phase transition in the Dicke Hamiltonian is due entirely to the absence of the A2 terms from the interaction Hamiltonian.Received 11 June 1975DOI:https://doi.org/10.1103/PhysRevLett.35.432©1975 American Physical Society