Quantum Process Randomness
Quantum Physics
2021-03-30 v2
Abstract
We study the optimization of any quantum process by minimizing the "randomness" in the measurement result at the output of that quantum process. We conceptualize and propose a measure of such randomness and inquire whether an optimization of the quantum process based on that measure, can reach the point where the process operates with maximum fidelity. We consider approximate quantum cloning and teleportation processes, and find, in particular, that the optimal approximate state-dependent quantum cloning machine obtained by maximizing the fidelity is different from that obtained by minimizing the randomness.
Cite
@article{arxiv.1903.03564,
title = {Quantum Process Randomness},
author = {Sreetama Das and Asutosh Kumar and Aditi Sen De and Ujjwal Sen},
journal= {arXiv preprint arXiv:1903.03564},
year = {2021}
}
Comments
v2: 6 pages, 2 figures, a generalization included, previous results unchanged