https://doi.org/10.1140/epjc/s10052-025-15241-3
Regular Article -Theoretical Physics
Tripartite quantum steering in Schwarzschild spacetime
School of Mathematics and Statistics, Hainan Normal University, 571158, Haikou, China
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Received:
13
November
2025
Accepted:
19
December
2025
Published online:
26
January
2026
Abstract
We investigate the effects of Hawking radiation on quantum steering and steering asymmetry in a tripartite system embedded in Schwarzschild spacetime. All tripartite steering types were classified, comprising three 
and three 
steering cases. Through a systematic analysis of all physically relevant scenarios (including accessible and inaccessible modes), we classify three canonical scenarios with one, two and three physically accessible modes. In the scenario of three physically accessible modes, Hawking radiation disrupts quantum steering, with the maximum steering asymmetry during the two-way steering to one-way steering transition precisely demarcating the phase boundary between these regimes. For two physically accessible modes, Hawking radiation exhibits dual behavior: enhancing the steering from Alice and Bob to anti-Charlie under certain parameters while suppressing it under others, while net strengthening other steering types. When considering one physically accessible mode, the Hawking effect of the black hole significantly enhances quantum steering. These findings provide new insights into quantum correlations in curved spacetime and establish observable signatures of Hawking effects in quantum steering phenomena.
© The Author(s) 2026
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Funded by SCOAP3.
