Comment on "Controlling the dynamical evolution of quantum coherence and quantum correlations in $e^{+} e^{-} \rightarrow \Lambda \bar{\Lambda}$ processes at BESIII''

TL;DR

This paper critically evaluates recent claims about quantum coherence and correlations in hyperon-antihyperon systems, arguing that the theoretical framework used is physically inconsistent and the quantum measures are not operationally meaningful.

Contribution

It exposes fundamental flaws in the application of open quantum system techniques to unstable particles produced in high-energy collisions.

Findings

The treatment of hyperon pairs as a bipartite quantum system is physically unjustified.

Quantum steering calculations lack operational meaning for unstable particles.

The reported quantum correlations are not physically relevant or measurable.

Abstract

We critically examine recent claims [Phys. Rev. D 113, 016024 (2026)] regarding quantum coherence, steering, and non-Markovian dynamics in the hyperon-antihyperon system produced in the process $e^{+} e^{-} \rightarrow \Lambda \bar{\Lambda}$. We argue that the theoretical framework employed in the analyzed work suffers from fundamental physical inconsistencies. In particular, the treatment of the $\Lambda \bar{\Lambda}$ pair as a bipartite system evolving under correlated quantum channels is not physically justified, since the produced hyperons are free, unstable particles that do not interact with a common environment after production. Consequently, the application of open quantum system techniques, including Markovian and non-Markovian quantum channels, lacks a clear physical basis. Moreover, we show that the computation and interpretation of quantum steering for this system is operationally and conceptually meaningless, as no well-defined measurement-induced state update or controllable local measurement scenario exists for unstable relativistic particles. These issues call into question the physical relevance of the reported quantum correlations, their hierarchy, and their dynamical behavior. Our analysis highlights the necessity of carefully distinguishing between formal mathematical quantifiers of quantumness and physically realizable quantum information protocols in high-energy particle systems.