Signatures of quantum fluctuations in the Dicke model by means of Rényi uncertainty
Manuel Calixto, Ábris Nagy, I. Paradela, E. Romera · Physical Review A · 2012
R\'enyi uncertainty relations are shown to have significant importance in quantum phase transitions. They detect the quantum phase transition in the Dicke model. The R\'enyi entropy sum is more appropriate for describing quantum fluctuations than the standard variance products.