Quantum Zeno effect in a probed downconversion process

Details Quantum Zeno effect in a probed downconversion process Quantum Zeno effect in a probed downconversion process

1999-11-05

arxiv.org/abs/quant-ph/9911018v2

Phys. Rev. A 62, 013804 (2000)

Physics

Quantum Physics

11 pages, 4 figures

Scientific paper

10.1103/PhysRevA.62.013804

The distorsion of a spontaneous downconvertion process caused by an auxiliary mode coupled to the idler wave is analyzed. In general, a strong coupling with the auxiliary mode tends to hinder the downconversion in the nonlinear medium. On the other hand, provided that the evolution is disturbed by the presence of a phase mismatch, the coupling may increase the speed of downconversion. These effects are interpreted as being manifestations of quantum Zeno or anti-Zeno effects, respectively, and they are understood by using the dressed modes picture of the device. The possibility of using the coupling as a nontrivial phase--matching technique is pointed out.

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