Logo
ScienceStack
Table of Contents
Fetching ...
Sign In

Wideband Quantum Transduction for Rydberg Atomic Receivers Using Six-Wave Mixing

Yuanbin Chen, Chau Yuen, Chong Meng Samson See

Abstract

Rydberg atomic receivers hold extremely high sensitivity to electric fields, yet their effective 3-dB baseband bandwidth under conventional electromagnetically induced transparency (EIT) is typically constrained to tens to a few hundreds of kilohertz, which hinders wideband wireless applications. To relax this bottleneck, we investigate a six-wave mixing (SWM)-based Rydberg atomic receiver as a wideband radio frequency (RF)-to-optical quantum transducer. Specifically, we develop an explicit baseband input-output model spanning from the probe input to the output light field. Based upon this model, a closed-form 3-dB bandwidth expression is derived to expose its dependence on key optical and RF parameters. We further quantify the linear dynamic range by employing the 1-dB compression point (P1dB) and the input-referred third-order intercept point (IIP3), unveiling a communication-compatible characterization of the bandwidth-linearity trade-off. Finally, our numerical results demonstrate that, given identical optical driving conditions, the SWM configuration increases the 3-dB baseband bandwidth by more than an order of magnitude compared to the EIT-based counterpart, while retaining comparable electric-field sensitivity and revealing a broad, tunable linear operating region.

Wideband Quantum Transduction for Rydberg Atomic Receivers Using Six-Wave Mixing

Abstract

Rydberg atomic receivers hold extremely high sensitivity to electric fields, yet their effective 3-dB baseband bandwidth under conventional electromagnetically induced transparency (EIT) is typically constrained to tens to a few hundreds of kilohertz, which hinders wideband wireless applications. To relax this bottleneck, we investigate a six-wave mixing (SWM)-based Rydberg atomic receiver as a wideband radio frequency (RF)-to-optical quantum transducer. Specifically, we develop an explicit baseband input-output model spanning from the probe input to the output light field. Based upon this model, a closed-form 3-dB bandwidth expression is derived to expose its dependence on key optical and RF parameters. We further quantify the linear dynamic range by employing the 1-dB compression point (P1dB) and the input-referred third-order intercept point (IIP3), unveiling a communication-compatible characterization of the bandwidth-linearity trade-off. Finally, our numerical results demonstrate that, given identical optical driving conditions, the SWM configuration increases the 3-dB baseband bandwidth by more than an order of magnitude compared to the EIT-based counterpart, while retaining comparable electric-field sensitivity and revealing a broad, tunable linear operating region.
Paper Structure (21 sections, 44 equations, 12 figures, 1 table)

This paper contains 21 sections, 44 equations, 12 figures, 1 table.

Table of Contents

  1. Introduction
  2. System Model
  3. Six-Level Atomic Systems and SWM Architecture
  4. Hamiltonian and Master Equation
  5. Optical Readout and Baseband Model
  6. Performance Analysis
  7. 3-dB Bandwidth Analysis
  8. Sensitivity Analysis
  9. Linear Dynamic Range
  10. P1dB
  11. IIP3
  12. Simulation Results
  13. Parameter Configuration
  14. Performance Evaluation
  15. Spectra: $\rho_{61}$ vs. $\Delta_\text{P}$
  16. ...and 6 more sections

Figures (12)

  • Figure 1: Illustration of the SWM-based Rydberg atomic receiver. (a) Six-level energy transition diagram. (b) The RF signal is converted to the (output) light field by SWM-based Rydberg atomic receiver.
  • Figure 2: Normalized steady-state solution $\rho_{61}$ versus the probe detuning $\Delta_\text{P}$.
  • Figure 3: Dependence of normalized steady-state solution $\rho_{61}$ on Rabi frequencies: (a) $\Omega_{{\text{LO}}}$, (b) $\Omega_{{\text{A}}}$, and (c) $\Omega_{{\text{RF}}}$.
  • Figure 4: Atomic system response $\left| H \left( \omega \right) \right|$ from the input $\Omega_{{\text{RF}}}$ to the optical output, $\rho_{41}$ for EIT and $\rho_{61}$ for SWM.
  • Figure 5: Dependence of the 3-dB bandwidth on the (a) LO Rabi frequency $\Omega_{{\text{LO}}}$, (b) auxiliary Rabi frequency $\Omega_{{\text{A}}}$, and (c) RF Rabi frequency $\Omega_{{\text{RF}}}$ in the SWM-based atomic system.
  • ...and 7 more figures

Theorems & Definitions (1)

  • Remark 1