Optimal Local Transformations of Flip and Exchange Symmetric Entangled States

TL;DR

This paper investigates optimal local transformations of flip and exchange symmetric entangled states, revealing that some states are more robust against conversion to near-separable states under these operations.

Contribution

It determines the maximum success probabilities for one-shot FES transformations and identifies states with higher robustness against local conversions.

Findings

Certain entangled states are more robust than others.

Optimal success probabilities for state conversions are established.

Robust states resist local FES operations leading to near-separable states.

Abstract

Local quantum operations relating multiqubit flip (0-1) and exchange symmetric (FES) states, with the maximum possible probability of success, have been determined by assuming that the states are converted via one-shot FES transformations. It has been shown that certain entangled states are more robust than others, in the sense that the optimum probability of converting these robust states to the states lying in the close neighborhood of separable ones vanish under local FES operations.