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arXiv · 2408.11277

Harvesting asymmetric steering via non-identical detectors

Shu-Min Wu·Rui-Di Wang·Xiao-Li Huang·Zejun Wang
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Abstract

We investigate asymmetric steering harvesting phenomenon involving two non-identical inertial detectors with different energy gaps, which interact locally with vacuum massless scalar fields. Our study assumes that the energy gap of detector $B$ exceeds that of detector $A$. It is shown that $A\rightarrow B$ steerability is bigger that $B\rightarrow A$ steerability, implying that the observer with a small energy gap has more stronger steerability than the other one. We find that the energy gap difference can enlarge the harvesting-achievable range of $A\rightarrow B$ steering, while it can also narrow the harvesting-achievable range of $B\rightarrow A$ steering at the same time. In addition, the maximal steering asymmetry indicates the transformation between two-way steering and one-way steering in some cases, showing that $B\rightarrow A$ steering suffers ``sudden death" at the point of this parameter. These results suggest that asymmetric steering exhibits richer and more interesting properties than quantum entanglement harvested from vacuum quantum field.

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Shu-Min Wu, Rui-Di Wang, Xiao-Li Huang, Zejun Wang. 2024-08-21. Harvesting asymmetric steering via non-identical detectors. https://arxiv.org/abs/2408.11277

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