https://doi.org/10.1140/epjp/s13360-022-03366-3
Regular Article
Concatenation of deleting machines
Department of Physics, School of Advanced Sciences, Vellore Institute of Technology, 632014, Vellore, Tamil Nadu, India
Received:
29
March
2022
Accepted:
6
October
2022
Published online:
19
October
2022
In this work, we analyze the performance of various deleting machines and their concatenation. It is observed that concatenation of Pati–Braunstein deleting machine and our deleting machine exhibits the same nonlocal properties. It is observed that concatenation of same deleting machines does not alter the fidelity of deletion and retention. Using negativity as a measure of quantum correlation of successive deleted states, we found that the total correlation created by deleting machines is always greater than that of concatenated deleting machines. For achieving better deletion, we have explored the concatenation of Buzek–Hillery cloning machine with different deleting machines. It is found that the deletion fidelity of concatenation of Buzek–Hillery cloning machine with our deleting machine is more than that of Buzek–Hillery cloning machine with Pati–Braunstein deleting machine for certain combinations of input states and blank states.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
