What the study found
The study finds that, for multipartite quantum states in Schwarzschild spacetime, higher excitation number q has opposite effects on different quantum resources under the Hawking effect. As q increases, quantum entanglement and mutual information decrease, while quantum coherence increases.
Why the authors say this matters
The authors conclude that, in gravitational settings, lowering the excitation number q is favorable for maintaining entanglement, while raising q may help tasks that depend on quantum coherence. The study suggests this is relevant for quantum information protocols in curved spacetime.
What the researchers tested
The researchers examined arbitrary q-th excited states, rather than focusing only on the vacuum state and first excited state. They studied multipartite quantum states in Schwarzschild spacetime and analyzed the effects of Hawking radiation on quantum entanglement, mutual information, and coherence.
What worked and what didn't
Increasing q was associated with reduced quantum entanglement and mutual information under the Hawking effect. In contrast, increasing q enhanced quantum coherence, so the Hawking effect on excited multipartite states appears to degrade some quantum correlations while protecting coherence.
What to keep in mind
The abstract does not describe experimental data, numerical details, or specific limits of the analysis. The summary is restricted to multipartite states in Schwarzschild spacetime and does not state whether the findings apply to other settings.
Key points
- The study examined arbitrary q-th excited states in multipartite quantum systems.
- Higher excitation number q reduced quantum entanglement and mutual information under the Hawking effect.
- Higher excitation number q increased quantum coherence.
- The authors say lower q is favorable for preserving entanglement in gravitational settings.
- The authors suggest higher q may be useful for coherence-based quantum information tasks.
Disclosure
- Research title:
- Higher excitation changes Hawking effects on quantum resources
- Authors:
- Shu-Min Wu, Xiao-Wei Teng, Hui-Chen Yang, Rui-Yang Xu, Pedro Barros, H. A. S. Costa
- Institutions:
- Liaoning Normal University, Liaoning Normal University, Liaoning Normal University, Liaoning Normal University, Universidade Federal do Piauí, Universidade Federal do Piauí
- Publication date:
- 2026-04-22
- OpenAlex record:
- View
Get the weekly research newsletter
Stay current with scholarly research without reading academic papers — one filtered digest, every Friday.