Estimating the Unruh effect via entangled many-body probes
- URL: http://arxiv.org/abs/2001.07865v1
- Date: Wed, 22 Jan 2020 03:30:11 GMT
- Title: Estimating the Unruh effect via entangled many-body probes
- Authors: Jieci Wang, Li Zhang, Songbai Chen, and Jiliang Jing
- Abstract summary: It is shown that the precision in the estimation of the Unruh temperature is always better than the precision in two probe strategies.
The probe state prepared with more excited atoms in the initial state is found to perform better than less excited initial states.
- Score: 3.9918594409417576
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We study the estimation of parameters in a quantum metrology scheme based on
entangled many-body Unruh-DeWitt detectors. It is found that the precision for
the estimation of Unruh effect can be enhanced via initial state preparations
and parameter selections. It is shown that the precision in the estimation of
the Unruh temperature in terms of a many-body-probe metrology is always better
than the precision in two probe strategies. The proper acceleration for Bob's
detector and the interaction between the accelerated detector and the external
field have significant influences on the precision for the Unruh effect's
estimation. In addition, the probe state prepared with more excited atoms in
the initial state is found to perform better than less excited initial states.
However, different from the estimation of the Unruh temperature, the estimation
of the effective coupling parameter for the accelerated detector requires more
total atoms but less excited atoms in the estimations.
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