scholarly journals Interplay of information quantifiers and the modified Jaynes-Cummings model

Open Physics ◽  
2011 ◽  
Vol 9 (6) ◽  
Author(s):  
Sayed Abdel-Khalek ◽  
Angelo Plastino ◽  
Abdel-Shafy Obada

AbstractThe dynamics of the Buck and Sukumar model (B. Buck and C. V. Sukumar, Phys. Lett. A 81, 132 (1981)) is investigated using different semi-classical information-theory tools. Their interplay reveals somewhat unexpected features. A new signature for the classical-quantum barrier is encountered thereby.

Quantum ◽  
2021 ◽  
Vol 5 ◽  
pp. 527
Author(s):  
Mankei Tsang

By taking a Poisson limit for a sequence of rare quantum objects, I derive simple formulas for the Uhlmann fidelity, the quantum Chernoff quantity, the relative entropy, and the Helstrom information. I also present analogous formulas in classical information theory for a Poisson model. An operator called the intensity operator emerges as the central quantity in the formalism to describe Poisson states. It behaves like a density operator but is unnormalized. The formulas in terms of the intensity operators not only resemble the general formulas in terms of the density operators, but also coincide with some existing definitions of divergences between unnormalized positive-semidefinite matrices. Furthermore, I show that the effects of certain channels on Poisson states can be described by simple maps for the intensity operators.


2011 ◽  
Vol 54 (12) ◽  
pp. 2202-2207 ◽  
Author(s):  
Gang Li ◽  
MingYong Ye ◽  
XiuMin Lin

1979 ◽  
Vol 22 (4) ◽  
pp. 433-448 ◽  
Author(s):  
Bruce R. Ebanks

In classical information theory, the amount of information provided by an experiment is measured by a function of the probability distribution of the outcomes of the experiment. In this paper, information measures are functions of sequences of elements of a monoid (S, ∘) with identity e. It is assumed that the measures {μn: Sn → ℝ} of information are branching.


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