English

Broadcasting of quantum correlations in qubit-qudit systems

Quantum Physics 2019-10-23 v2

Abstract

Quantum mechanical properties like entanglement, discord and coherence act as fundamental resources in various quantum information processing tasks. Consequently, generating more resources from a few, typically termed as broadcasting is a task of utmost significance. One such strategy of broadcasting is through the application of cloning machines. In this article, broadcasting of quantum resources beyond 222 \otimes 2 systems is investigated. In particular, in 232\otimes3 dimension, a class of states not useful for broadcasting of entanglement is characterized for a choice of optimal universal Heisenberg cloning machine. The broadcasting ranges for maximally entangled mixed states (MEMS) and two parameter class of states (TPCS) are obtained to exemplify our protocol. A significant derivative of the protocol is the generation of entangled states with positive partial transpose in 333 \otimes 3 dimension and states which are absolutely separable in 222 \otimes 2 dimension. Moving beyond entanglement, in 2d2 \otimes d dimension, the impossibility to optimally broadcast quantum correlations beyond entanglement (QCsbE) (discord) and quantum coherence (l1l_{1}-norm) is established. However, some significant illustrations are provided to highlight that non-optimal broadcasting of QCsbE and coherence are still possible.

Keywords

Cite

@article{arxiv.1807.11002,
  title  = {Broadcasting of quantum correlations in qubit-qudit systems},
  author = {Rounak Mundra and Dhrumil Patel and Indranil Chakrabarty and Nirman Ganguly and Sourav Chatterjee},
  journal= {arXiv preprint arXiv:1807.11002},
  year   = {2019}
}

Comments

Edited sections, changed figures

R2 v1 2026-06-23T03:18:04.754Z