Journal
PHYSICAL REVIEW LETTERS
Volume 111, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.063001
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Funding
- DARPA QuASAR program through a grant from ARO [60181-PH-DRP]
- NSF [PHY-1104424]
- Direct For Mathematical & Physical Scien
- Division Of Physics [1104424] Funding Source: National Science Foundation
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It is clearly important to pursue atomic standards for quantities like electromagnetic fields, time, length, and gravity. We have recently shown using Rydberg states that Rb atoms in a vapor cell can serve as a practical, compact standard for microwave electric field strength. Here we demonstrate for the first time that Rb atoms excited in a vapor cell can also be used for vector microwave electrometry by using Rydberg-atom electromagnetically induced transparency. We describe the measurements necessary to obtain an arbitrary microwave electric field polarization at a resolution of 0.5 degrees. We compare the experiments to theory and find them to be in excellent agreement.
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