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Article overview
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Quantum Zeno effect and non-Markovianity in a three-level system | | Antti Karlsson
; Francesco Francica
; Jyrki Piilo
; Francesco Plastina
; | | Date: |
3 Feb 2016 | | Abstract: | We study the coexistence of the quantum Zeno effect and non-Markovianity for
a system decaying in a structured bosonic environment and subject to a control
field. The interaction with the environment induces decay from the excited to
the ground level, which, in turn, is coherently coupled to another meta-stable
state. The control of the strength of the coherent coupling between the stable
levels allows the engineering of both the dissipation and of the memory
effects, without modifying neither the system-reservoir interaction, nor
environmental properties. We use this framework in two different parameter
regimes corresponding to fast (bad cavity limit) and slow dissipation (good
cavity limit) in the original, un-controlled qubit system. Our results show a
non-monotonic behavior of memory effects when increasing the effectiveness of
the Zeno-like freezing. Moreover, we identify a new source of memory effects
which allows the persistence of non-Markovianity for long times while the
excited state has already been depleted. | | Source: | arXiv, 1602.1235 | | Services: | Forum | Review | PDF | Favorites | |
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