تقرير
A class of quasi-eternal non-Markovian Pauli channels and their measure
| العنوان: | A class of quasi-eternal non-Markovian Pauli channels and their measure |
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| المؤلفون: | Utagi, Shrikant, Rao, Vinod N., Srikanth, R., Banerjee, Subhashish |
| المصدر: | Open Systems & Information Dynamics, Vol. 27, No. 4, 2050019 (2020) |
| سنة النشر: | 2020 |
| المجموعة: | Quantum Physics |
| مصطلحات موضوعية: | Quantum Physics |
| الوصف: | We study a class of qubit non-Markovian general Pauli dynamical maps with multiple singularities in the generator. We discuss a few easy examples involving trigonometric or other non-monotonic time dependence of the map, and discuss in detail the structure of channels which don't have any trigonometric functional dependence. We demystify the concept of a singularity here, showing that it corresponds to a point where the dynamics can be regular but the map is momentarily non-invertible, and this gives a basic guideline to construct such non-invertible non-Markovian channels. Most members of the channels in the considered family are quasi-eternally non-Markovian (QENM), which is a broader class of non-Markovian channels than the eternal non-Markovian channels. In specific, the measure of quasi-eternal non-Markovian (QENM) channels in the considered class is shown to be $\frac{2}{3}$ in the isotropic case, and about 0.96 in the anisotropic case. Comment: 13 pages, 6 figures. Close to the published version |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1142/S1230161220500195 |
| URL الوصول: | http://arxiv.org/abs/2002.11452 |
| رقم الأكسشن: | edsarx.2002.11452 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1142/S1230161220500195 |
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