Gaussian quantum steering in multi-event horizon spacetime
- URL: http://arxiv.org/abs/2212.05483v2
- Date: Wed, 21 Feb 2024 11:04:41 GMT
- Title: Gaussian quantum steering in multi-event horizon spacetime
- Authors: Shu-Min Wu, Jin-Xuan Li, Xiao-Wei Fan, Wen-Mei Li, Xiao-Li Huang,
Hao-Sheng Zeng
- Abstract summary: We study quantum steering in the Schwarzschild-de Sitter spacetime endowed with two different Hawking temperatures.
For the first time, we find that the Hawking effect can improve quantum steering.
- Score: 1.4470320778878745
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: We study Gaussian quantum steering in the Schwarzschild-de Sitter (SdS)
spacetime that is endowed with both a black hole event horizon (BEH) and a
cosmological event horizon (CEH), giving rise to two different Hawking
temperatures. It is shown that the Hawking effect of the black hole always
reduces the quantum steering, but the Hawking effect of the expanding universe
does not always play the same role. For the first time, we find that the
Hawking effect can improve quantum steering. We also find that the observer who
locates in the BEH has stronger steerability than the observer who locates in
CEH. Further, we study the steering asymmetry, and the conditions for two-way,
one-way and no-way steering in the SdS spacetime. Finally, we study the
Gaussian quantum steering in the scenario of effective equilibrium temperature.
We show that quantum steering reduces monotonically with the effective
temperature but now increases monotonically with the Hawking temperature of the
black hole, which banishes the belief that the Hawking effect can only destroy
quantum steering.
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