Quantum computation and quantum information
Quantum computation and quantum information
Quantum Information: An Introduction to Basic Theoretical Concepts and Experiments
Quantum Information: An Introduction to Basic Theoretical Concepts and Experiments
Evolution from entanglement to decoherence of bipartite mixed "X" states
Quantum Information & Computation
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In this paper, we have presented an analytic solution for two 2-level identical atoms interacting with a single-mode quantized radiation field, taking into account the level shifts produced by Stark shift. We assume that the two atoms are initially prepared in the exited state and the field in a coherent state. We investigate the purity loss of the system and bipartite partitions of the system. The effects of the Stark shift on the purity loss of the system and different bipartite partitions of the system (field-two atoms, atom-(field+atom)) through the tangles are considered. In particular, the effect of the Stark shift on the amount of entanglement between atoms and field is evaluated by the negativity.