Continuous-variable graph states for quantum metrology

• URL: http://arxiv.org/abs/2010.10704v1
• Date: Wed, 21 Oct 2020 01:29:17 GMT
• Title: Continuous-variable graph states for quantum metrology
• Authors: Yunkai Wang and Kejie Fang
• Abstract summary: Graph states are a unique resource for quantum information processing, such as measurement-based quantum computation. We identify the optimal graph states for the two sensing modalities and show that Heisenberg scaling of the accuracy for both phase and displacement sensing can be achieved with local homodyne measurements.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Graph states are a unique resource for quantum information processing, such as measurement-based quantum computation. Here, we theoretically investigate using continuous-variable graph states for single-parameter quantum metrology, including both phase and displacement sensing. We identified the optimal graph states for the two sensing modalities and showed that Heisenberg scaling of the accuracy for both phase and displacement sensing can be achieved with local homodyne measurements.

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