Precision frequency measurements with entangled states

2005/08/19 by C. F. Roos, Roos, C. F. · 1 citation
Decision Sciences · Physics and Astronomy · #Advanced Frequency and Time Standards #Cold Atom Physics and Bose-Einstein Condensates #FOS: Physical sciences #Quantum Physics (quant-ph) #Scientific Measurement and Uncertainty Evaluation #quant-ph

paper · pdf · doi:10.48550/arxiv.quant-ph/0508148

4 pages, 1 figure

arxiv created 2005/08/19 · openalex publication_date 2005/08/19 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We demonstrate how quantum entanglement can be used for precision frequency measurements with trapped ions. In particular, we show how to suppress linear Zeeman shifts in optical frequency measurements by using maximally entangled states of two ions even if the individual ions do not have any field-independent transition. In addition, this technique allows for an accurate measurement of small external field frequency shifts such as the electric quadrupole shift which are important for ion clock experiments.

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