Fisher information, Rényi entropy power and quantum phase transition in the Dicke model
Fisher information, Rényi entropy power and Fisher–Rényi information product are presented for the Dicke model. There is a quantum phase transition in this quantum optical model. It is pointed out that there is an abrupt change in the Fisher information, Rényi entropy power, the Fisher, Shannon and Rényi lengths at the transition point. It is found that these quantities diverge as the characteristic length: |λc−λ|−1/4 around the critical value of the coupling strength λc for any value of the parameter β.
Year of publication: |
2012
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Authors: | Nagy, Á. ; Romera, E. |
Published in: |
Physica A: Statistical Mechanics and its Applications. - Elsevier, ISSN 0378-4371. - Vol. 391.2012, 13, p. 3650-3655
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Publisher: |
Elsevier |
Subject: | Quantum phase transition | Dicke model | Fisher information | Fisher-Rényi information product |
Saved in:
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