Physics – Quantum Physics
Scientific paper
2005-04-29
J Opt B Quantum Semiclass Opt 6, 201 (2004)
Physics
Quantum Physics
18 pages, 9 figures
Scientific paper
10.1088/1464-4266/6/4/003
The problem of the relationship between entanglement and two-qubit systems in which it is embedded is central to the quantum information theory. This paper suggests that the concurrence hierarchy as an entanglement measure provides an alternative view of how to think about this problem. We consider mixed states of two qubits and obtain an exact solution of the time-dependent master equation that describes the evolution of two two-level qubits (or atoms) within a perfect cavity for the case of multiphoton transition. We consider the situation for which the field may start from a binomial state. Employing this solution, the significant features of the entanglement when a second qubit is weakly coupled to the field and becomes entangled with the first qubit, is investigated. We also describe the response of the atomic system as it varies between the Rabi oscillations and the collapse-revival mode and investigate the atomic inversion and the Q-function. We identify and numerically demonstrate the region of parameters where significantly large entanglement can be obtained. Most interestingly, it is shown that features of the entanglement is influenced significantly when the multi-photon process is involved. Finally, we obtain illustrative examples of some novel aspects of this system and show how the off-resonant case can sensitize entanglement to the role of initial state setting.
No associations
LandOfFree
Perspectives for a mixed two-qubit system with binomial quantum states does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Perspectives for a mixed two-qubit system with binomial quantum states, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Perspectives for a mixed two-qubit system with binomial quantum states will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-402604