Phase-Resolved Rydberg Atom Field Sensing using Quantum Interferometry

Samuel Berweger; Alexandra B. Artusio-Glimpse; Andrew P. Rotunno; Nikunjkumar Prajapati; Joseph D. Christesen; Kaitlin R. Moore; Matthew T. Simons; Christopher L. Holloway

arXiv · 2212.00185

Phase-Resolved Rydberg Atom Field Sensing using Quantum Interferometry

Samuel Berweger·Alexandra B. Artusio-Glimpse·Andrew P. Rotunno·Nikunjkumar Prajapati·Joseph D. Christesen·Kaitlin R. Moore·Matthew T. Simons·Christopher L. Holloway

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Abstract

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$^\circ$ 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.

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Samuel Berweger, Alexandra B. Artusio-Glimpse, Andrew P. Rotunno, Nikunjkumar Prajapati, Joseph D. Christesen, Kaitlin R. Moore, Matthew T. Simons, Christopher L. Holloway. 2022-12-01. Phase-Resolved Rydberg Atom Field Sensing using Quantum Interferometry. https://arxiv.org/abs/2212.00185

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