The effect of the field–field interaction on a cavity containing two qubit(TQ)interacting with a two mode of electromagnetic field as parametric amplifier type is investigated.After performing an appropriate transfor...The effect of the field–field interaction on a cavity containing two qubit(TQ)interacting with a two mode of electromagnetic field as parametric amplifier type is investigated.After performing an appropriate transformation,the constants of motion are calculated.Using the Schrödinger differential equation a system of differential equations was obtained,and the general solution was obtained in the case of exact resonance.Some statistical quantities were calculated and discussed in detail to describe the features of this system.The collapses and revivals phenomena have been discussed in details.The Shannon information entropy has been applied for measuring the degree of entanglement(DE)between the qubits and the electromagnetic field.The normal squeezing for some values of the parameter of the field–field interaction is studied.The results showed that the collapses disappeared after the field–field terms were added and the maximum values of normal squeezing decrease when increasing of the field–field interaction parameter.While the revivals and amplitudes of the oscillations increase when the parameter of the field–field interaction increases.Degree of entanglement is partially more entangled with increasing of the field-field interaction parameter.The relationship between revivals,collapses and the degree of entanglement(Shannon information entropy)was monitored and discussed in the presence and absence of the field–field interaction.展开更多
基金the University of Jeddah,Saudi Arabia,under Grant No.UJ-02-082-DR.
文摘The effect of the field–field interaction on a cavity containing two qubit(TQ)interacting with a two mode of electromagnetic field as parametric amplifier type is investigated.After performing an appropriate transformation,the constants of motion are calculated.Using the Schrödinger differential equation a system of differential equations was obtained,and the general solution was obtained in the case of exact resonance.Some statistical quantities were calculated and discussed in detail to describe the features of this system.The collapses and revivals phenomena have been discussed in details.The Shannon information entropy has been applied for measuring the degree of entanglement(DE)between the qubits and the electromagnetic field.The normal squeezing for some values of the parameter of the field–field interaction is studied.The results showed that the collapses disappeared after the field–field terms were added and the maximum values of normal squeezing decrease when increasing of the field–field interaction parameter.While the revivals and amplitudes of the oscillations increase when the parameter of the field–field interaction increases.Degree of entanglement is partially more entangled with increasing of the field-field interaction parameter.The relationship between revivals,collapses and the degree of entanglement(Shannon information entropy)was monitored and discussed in the presence and absence of the field–field interaction.
