342 research outputs found
Phase-Resolved Rydberg Atom Field Sensing using Quantum Interferometry
Although Rydberg atom-based electric field sensing provides key advantages
over traditional antenna-based detection, it remains limited by the need for a
local oscillator (LO) for low-field and phase resolved detection. In this work,
we demonstrate that closed-loop quantum interferometric schemes can be used to
generate a system-internal reference that can directly replace an external LO
for Rydberg field sensing. We reveal that this quantum-interferometrically
defined internal reference phase and frequency can be used analogously to a
traditional LO for atom-based down-mixing to an intermediate frequency for
lock-in phase detection. We demonstrate that this LO-equivalent functionality
provides analogous benefits to an LO, including full 360 phase
resolution as well as improved sensitivity. The general applicability of this
approach is confirmed by demodulating a four phase-state signal broadcast on
the atoms. Our approach opens up new sensing schemes and provides a clear path
towards all-optical Rydberg atom sensing implementations
- …