Enhanced quantum state transfer via feedforward cancellation of optical phase noise

Many experimental platforms for quantum science depend on state control via laser fields. Frequently, however, the control fidelity is limited by optical phase noise. This is exacerbated in stabilized laser systems where high-frequency phase noise is an unavoidable consequence of feedback. Here we i...

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Bibliographic Details
Main Authors:	Maddox, Benjamin P, Mortlock, Jonathan M, Hepworth, Tom R, Raghuram, Adarsh P, Gregory, Philip D, Guttridge, Alexander, Cornish, Simon L
Format:	Journal Article
Language:	English
Published:	12-07-2024
Subjects:	Physics - Atomic Physics Physics - Quantum Gases Physics - Quantum Physics
Online Access:	Get full text
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Summary:	Many experimental platforms for quantum science depend on state control via laser fields. Frequently, however, the control fidelity is limited by optical phase noise. This is exacerbated in stabilized laser systems where high-frequency phase noise is an unavoidable consequence of feedback. Here we implement an optical feedforward technique to suppress laser phase noise in the STIRAP state transfer of ultracold RbCs molecules, across 114 THz, from a weakly bound Feshbach state to the rovibrational ground state. By performing over 100 state transfers on single molecules, we measure a significantly enhanced transfer efficiency of 98.7(1)% limited only by available laser intensity.
DOI:	10.48550/arxiv.2407.09119