Quantum

Susceptibility of qudit-qudit entanglement to quantum noise: insights from the negativity rank

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 09/10/2026, 04:13:25 UTC.

Briefings

A 2026 study using the negativity rank demonstrates that higher negativity rank provides greater robustness to depolarizing noise in qudit-qudit systems. The research extends the maximum number of separable states that can be mixed into an entangled pure ensemble while maintaining the original negativity rank. It also establishes noise boundaries for the APPT subspace and calculates the maximum qutrit-qutrit APPT purity, advancing the search for APPT entanglement.

Key points

• Higher negativity rank provides greater robustness to depolarizing noise in qudit-qudit bipartitions.
• The maximum number of separable states that can be arbitrarily mixed into an entangled pure ensemble while retaining negativity equals the original negativity rank.

Context and limitations

Results are based on a single preprint (arXiv:2610.10820v1) with limited coverage of experimental validation and long-term stability under different noise types.

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