Comment on "Quantum teleportation, entanglement, LQU and LQFI in $e^{+} e^{-} \rightarrow \mathrm{Y} \overline{\mathrm{Y}}$ processes at BESIII through noisy channels''

TL;DR

This paper critically examines the application of quantum information concepts to hyperon-antihyperon pairs at BESIII, emphasizing the lack of physical correspondence in the interpretation of quantum correlations and the inapplicability of teleportation fidelity as a quantum communication measure.

Contribution

It clarifies the physical limitations of applying standard decoherence models and quantum information measures to high-energy particle systems like hyperons.

Findings

Spin density matrix describes production correlations but lacks a clear decoherence interpretation.

Teleportation fidelity should not be viewed as operational quantum communication evidence.

Quantum correlations in these systems are static and do not represent usable quantum resources.

Abstract

We provide a critical assessment of a recent study applying quantum information concepts, including noisy channels and teleportation fidelity, to hyperon-antihyperon pairs produced in $e^{+}e^{-} \to Y\bar Y$ reactions at BESIII. While the spin density matrix reconstructed from experimental data provides a physically meaningful description of production correlations, we argue that its subsequent interpretation in terms of standard decoherence models-such as amplitude damping, phase damping, and phase flip-lacks a clear physical correspondence for these systems. The produced particles emerge from a single scattering event and propagate as free, unstable relativistic states, without a well-defined system-environment interaction acting on their spin degrees of freedom. As a result, the variation of quantum correlations with an abstract noise parameter does not describe a genuine physical evolution. We further contend that the reported teleportation fidelity should not be interpreted as evidence for operational quantum communication, since hyperon states cannot be prepared, controlled, or measured in a way that would enable a realizable teleportation protocol. More generally, quantities such as logarithmic negativity, local quantum uncertainty, and local quantum Fisher information primarily characterize static production correlations rather than directly usable quantum resources. Our analysis highlights the importance of distinguishing between formal quantum-information measures and their physical interpretation in high-energy particle systems.