Abstract
We give a theoretical description of two time-dependent laser beams in the Λ scheme using a unitary transformation method and a trapped three-level ion. We extend earlier investigations aimed at finding the three types of density matrices. We present figures showing that the entanglement degree accelerates due to the time-dependent interaction and the second-order terms of the Lamb–Dicke parameter η(t). Our results explain that the time-dependent ionic–phononic quantum system is observed at a higher degree of entanglement for three optimum times; these are, respectively, 16.5, 110, and 220 fs. These optimum entangled states can be modified for the structure of black holes in a probabilistic Universe.
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Dermez, R. Quantification of Mixed-State Entanglement in a Quantum System Interacting with Two Time-Dependent Lasers. J Russ Laser Res 34, 192–202 (2013). https://doi.org/10.1007/s10946-013-9342-y
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DOI: https://doi.org/10.1007/s10946-013-9342-y