We study the competing effects of simultaneous Markovian and non-Markovian decoherence mechanismsacting on a single spin. We show the existence of a threshold in the relative strength of such mechanisms above which the spin dynamics becomes fully Markovian, as revealed by the use of several non-Markovianity mea- sures. We identify a measure-dependent nested structure of such thresholds, hinting at a causality relationship amongst the various non-Markovianity witnesses used in our analysis. Our considerations are then used to ar- gue the unavoidably non-Markovian evolution of a single-electron quantum dot exposed to both intrinsic and Markovian technical noise, the latter of arbitrary strength
|Numero di pagine||1|
|Rivista||PHYSICAL REVIEW A|
|Stato di pubblicazione||Published - 2014|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
Lorenzo, S., Apollaro, T. J. G., Di Franco, C., Plastina, F., & Paternostro, M. (2014). Competition between memory-keeping and memory-erasing decoherence channels. PHYSICAL REVIEW A, 90, 012310-012310.