Entanglement in quantum systems can be irreversibly lost due to local Markovian noise, but a related property called "magic" can be regained under certain conditions. Research on the $n$-qubit GHZ family has shown that local amplitude damping can cause these systems to lose their magic at a specific damping strength, denoted as $γ_-$, and then regain it as the damping increases1. This phenomenon is significant because it highlights the difference between separability and stabilizer membership, where the latter is not preserved by local channels. As a result, dissipation can push states out of the stabilizer polytope, allowing for the rebirth of magic. This discovery has implications for the understanding and control of quantum systems, particularly in the context of quantum computing and information processing. The ability to manipulate and restore magic in quantum systems can be crucial for developing robust and reliable quantum technologies, so understanding the dynamics of magic and its relationship to entanglement and dissipation is essential for advancing the field.
Sudden death of entanglement, rebirth of magic
⚡ High Priority
Why This Matters
Unlike separability, stabilizer membership is not preserved by local channels, allowing dissipation to push states out of the stabilizer polytope as well as in.
References
- [Authors]. (2026, May 21). Sudden death of entanglement, rebirth of magic. *arXiv Quantum Physics*. https://arxiv.org/abs/2605.22603v1
Original Source
arXiv Quantum Physics
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