Harvesting asymmetric steering via non-identical detectors

• URL: http://arxiv.org/abs/2408.11277v1
• Date: Wed, 21 Aug 2024 02:00:54 GMT
• Title: Harvesting asymmetric steering via non-identical detectors
• Abstract summary: We investigate asymmetric steering harvesting phenomenon involving two non-identical inertial detectors with different energy gaps. We find that the energy gap difference can enlarge the harvesting-achievable range of $Arightarrow B$ steering. The maximal steering asymmetry indicates the transformation between two-way steering and one-way steering in some cases.
• Score: 0.5399800035598186
• License: http://creativecommons.org/licenses/by/4.0/
• 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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