OPTIMIZING OF MAXIMALLY-ENTANGLED STATE BY MEANS OF NONLINEARITY
M. S. Ateto · International Journal of Quantum Information · 2007
New analytical formulas for the concurrence are introduced. A system of initially unentangled two two-level atoms entering a cavity successively and the effect of a nonlinear medium on the properties of their entanglement are studied. It is shown that a good periodical entanglement can be achieved with a weak nonlinear medium and low driving field, while the perfect is reached with high driving field and low or high parameters of nonlinearity.