Protocol for unambiguous quantum state discrimination using quantum coherence
Quantum Physics
2021-08-10 v4
Abstract
Roa et al. showed that quantum state discrimination between two nonorthogonal quantum states does not require quantum entanglement but quantum dissonance only. We find that quantum coherence can also be utilized for unambiguous quantum state discrimination. We present a protocol and quantify the required coherence for this task. We discuss the optimal unambiguous quantum state discrimination strategy in some cases. In particular, our work illustrates an avenue to find the optimal strategy for discriminating two nonorthogonal quantum states by measuring quantum coherence.
Cite
@article{arxiv.1807.04542,
title = {Protocol for unambiguous quantum state discrimination using quantum coherence},
author = {Sunho Kim and Longsuo Li and Asutosh Kumar and Chunhe Xiong and Sreetama Das and Ujjwal Sen and Arun Kumar Pati and Junde Wu},
journal= {arXiv preprint arXiv:1807.04542},
year = {2021}
}
Comments
8 pages, 3 figures, close to the accepted version