• Robustness of coherence for multipartite quantum states

• Fulltext

https://www.ias.ac.in/article/fulltext/pram/093/05/0069

• Keywords

Robustness of coherence; subadditivity; $l_{1}$-norm

• Abstract

In this brief report, we prove that the robustness of coherence (ROC), in contrast with many popular quantitative measures of quantum coherence derived from the resource-theoretic framework of coherence, may be a subadditive for a specific class of multipartite quantum states. We investigate how the subadditivity is affected by admixture with other classes of states for which ROC is superadditive. We show that pairs of quantum states may have different orderings with respect to relative entropy of coherence, $l_{1}$-norm of coherence and ROC and numerically study the difference in ordering for the chosen pairwise coherence measures.

• Author Affiliations

2. Training School Complex, Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400 085, India
3. Centre for Security, Theory and Algorithmic Research, International Institute of Information Technology, Gachibowli, Hyderabad 500 032, India

• Pramana – Journal of Physics

Volume 95, 2021
All articles
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• Editorial Note on Continuous Article Publication

Posted on July 25, 2019