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RSS FeedsEntropy, Vol. 21, Pages 917: Coherent State Control to Recover Quantum Entanglement and Coherence (Entropy)

 
 

20 september 2019 14:04:23

 
Entropy, Vol. 21, Pages 917: Coherent State Control to Recover Quantum Entanglement and Coherence (Entropy)
 


How to analytically deal with the entanglement and coherence dynamics of separated Jaynes–Cummings nodes with continuous-variable fields is still an open question. We here generalize this model to a more common situation including either a small or large qubit-field detuning, and obtain two new analytical formulas. The X-state simplification, Fock-state shortcut and detuning-limit approximation work together in an amazingly accurate way, which agrees with the numerical results. The new formulas almost perfectly predict the two-qubit entanglement dynamics both in sudden death and rebirth phenomenon for detuning interactions. We find that when both the qubit-field detuning and amplitude of coherent states are large enough, the maximal entanglement and coherence peaks can be fully and periodically retrieved, and their revival periods both increase linearly with the increasing detuning.


 
243 viewsCategory: Informatics, Physics
 
Entropy, Vol. 21, Pages 918: The Landauer Principle: Re-Formulation of the Second Thermodynamics Law or a Step to Great Unification? (Entropy)
Entropy, Vol. 21, Pages 920: Emotional Speech Recognition Based on the Committee of Classifiers (Entropy)
 
 
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