Quantum steering of GHZ and W states in relativistic motion
Abstract We investigate tripartite quantum steering dynamics in a three-Unruh–DeWitt-detector system, examining both $$1\rightarrow 2$$ 1 → 2 (i.e., from Alice to Bob and Charlie) and $$2\rightarrow 1$$ 2 → 1 steering (i.e., from Alice and Bob to Charlie) configurations under two paradigmatic entang...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-07-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-025-14516-z |
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| Summary: | Abstract We investigate tripartite quantum steering dynamics in a three-Unruh–DeWitt-detector system, examining both $$1\rightarrow 2$$ 1 → 2 (i.e., from Alice to Bob and Charlie) and $$2\rightarrow 1$$ 2 → 1 steering (i.e., from Alice and Bob to Charlie) configurations under two paradigmatic entangled initial states: the Greenberger–Horne–Zeilinger (GHZ) and W states. Our analysis demonstrates that $$1\rightarrow 2$$ 1 → 2 steering exhibits better resistance to Unruh decoherence than $$2\rightarrow 1$$ 2 → 1 steering. Notably, the $$1\rightarrow 2$$ 1 → 2 steering of the W state displays a non-monotonic dependence on the acceleration parameter, indicating that the Unruh effect can, in certain regimes, enhance quantum steering. These results suggest that the Unruh effect plays a dual role in tripartite quantum systems, as it can both enhance and degrade quantum steering. Consequently, moving beyond the conventional interpretation of the Unruh effect as merely a source of decoherence, our study provides a new insight by exploring tripartite quantum steering in a relativistic setting. |
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| ISSN: | 1434-6052 |