arXiv subjects

Baran Kayim

Publications and source records attributed to Baran Kayim.

3 recordsLinked to original sources

arXiv2026

Characteristics of VHF and UHF band detection using Stark shifting in Rydberg-atom sensors

We present a characterization of the sensitivity of broadband electric field measurements in the Very High Frequency (VHF) and Ultra High Frequency (UHF) bands using AC stark shifting of Rydberg states. The dependence of the sensitivity and dynamic range of the field measurements using nD5/2 states of cesium for principal quantum numbers n= 60, 70, 80, 90 and 100 is presented, detailing the intricacies involved. The frequencies considered for the measurement range from 50 MHz to 900 MHz for which a transverse electromagnetic (TEM) cell is used to excite the Rydberg atoms with the RF fields. The relative sensitivities achieved for various principal quantum numbers are presented. A general trend of better sensitivity for higher principal quantum numbers is observed. This work paves the way for a better understanding of the AC Stark dependent field measurements using Rydberg sensors.

physics.atom-ph↗

arXiv2026

Calibration of electric fields in low-frequency off-resonant Rydberg receivers

We present results on Rydberg atom-based electric field sensing in the range of 1 kHz - 300 MHz, using a three-photon Rydberg excitation scheme and a transverse electromagnetic (TEM) line waveguide to apply low-frequency rf fields to the cell. Measurements of low-frequency screening in quartz and sapphire vapor cells show excellent agreement with a phenomenological model of the effective vapor cell material properties based on an electrical 2-port measurement of the TEM line. We achieve a best noise-equivalent field of 106(4) $\mathrm{\frac{μV}{m \sqrt{Hz}}}$ at 300 MHz and characterize noise-equivalent fields in the ultra-low to very-low frequency (ULF-VLF) band.

physics.atom-ph↗

arXiv2023

Very-high- and ultrahigh- frequency electric field detection using high angular momentum Rydberg states

We demonstrate resonant detection of rf electric fields from 240 MHz to 900 MHz (very-high-frequency (VHF) to ultra-high-frequency (UHF)) using electromagnetically induced transparency to measure orbital angular momentum $L=3\rightarrow L'=4$ Rydberg transitions. These Rydberg states are accessible with three-photon infrared optical excitation. By resonantly detecting rf in the electrically small regime, these states enable a new class of atomic receivers. We find good agreement between measured spectra and predictions of quantum defect theory for principal quantum numbers $n=45$ to $70$. Using a super-hetrodyne detection setup, we measure the noise floor at $n=50$ to be $13\,\mathrm{μV/m/\sqrt{Hz}}$. Additionally, we utilize data and a numerical model incorporating a five-level master equation solution to estimate the fundamental sensitivity limits of our system.

physics.atom-ph↗