Quantum Assisted Electrometry using Bright Atomic Resonances

Abstract

We demonstrate a new method for measuring radio frequency (RF) electric fields based on quantum interference in an atom. Using a bright resonance prepared within an electromagnetically induced transparency window we are able to achieve a sensitivity of ~ 30 μV cm^-1 sqrt(Hz)^-1. For this work, we demonstrated detection of RF electric fields as small as ~ 8 μV cm^-1. The sensitivity is currently limited by the spectral bandwidth of the lasers used in the experiment and can be significantly improved in the future. The method can serve as a new quantum based standard for RF electrometry. The reproducibility, accuracy and stability of using a quantum system for measuring RF electric fields promises to advance electrometry to the current levels of magnetometry.

References in corpus (6)

• New Measurement of the Electron Magnetic Moment and the Fine Structure Constant
• Quantum noise limited and entanglement-assisted magnetometry
• Polarized alkali vapor with minute-long transverse spin-relaxation time
• Measurement of absolute transition frequencies of 87Rb to nS and nD Rydberg states by means of electromagnetically induced transparency
• Measurement of the electric dipole moments for transitions to rubidium Rydberg states via Autler-Townes splitting
• Accurate determination of electric-dipole matrix elements in K and Rb from Stark shift measurements

Cited by in corpus (4)

• Radio-frequency-modulated Rydberg states in a vapor cell
• Electric field sensing near the surface microstructure of an atom chip using cold Rydberg atoms
• Transition from electromagnetically induced transparency to Autler-Townes splitting in cold cesium atoms
• Effect of line broadening on the performance of Faraday filters