Signatures of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mi>A</mml:mi><mml:mn>2</mml:mn></mml:msup></mml:math>term in ultrastrongly coupled oscillatorsTommaso Tufarelli, M. S. Kim|Physical Review A|2015Cited by 24