2014/05/31 by Jieci Wang, Zehua Tian, Jiliang Jing +1 · 1 citation
Computer Science · Mathematics · Physics and Astronomy · #Acceleration #Detector #Field (mathematics) #Massless particle #Mathematics #Metrology #Open quantum system #Optics #Physics #Quantum #Quantum Electrodynamics and Casimir Effect #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum mechanics #Quantum metrology #Quantum sensor #Quantum technology #Scalar (mathematics) #Scalar field #Statistical physics #Unruh effect #gr-qc #quant-ph
paper · pdf · doi:10.1038/srep07195
published as Scientific Reports 4, 7195 (2014) · 24 pages,3 figures, typos corrected, new references added
openalex publication_date 2014/11/26 · arxiv created 2016/06/09 · arxiv updated 2016/06/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We study the quantum metrology for a pair of entangled Unruh-Dewitt detectors when one of them is accelerated and coupled to a massless scalar field. Comparing with previous schemes, our model requires only local interaction and avoids the use of cavities in the probe state preparation process. We show that the probe state preparation and the interaction between the accelerated detector and the external field have significant effects on the value of quantum Fisher information, correspondingly pose variable ultimate limit of precision in the estimation of Unruh effect. We find that the precision of the estimation can be improved by a larger effective coupling strength and a longer interaction time. Alternatively, the energy gap of the detector has a range that can provide us a better precision. Thus we may adjust those parameters and attain a higher precision in the estimation. We also find that an extremely high acceleration is not required in the quantum metrology process.