Experimental measurement of quantum-first-passage-time distributions

• URL: http://arxiv.org/abs/2508.21790v1
• Date: Fri, 29 Aug 2025 17:09:45 GMT
• Title: Experimental measurement of quantum-first-passage-time distributions
• Authors: Joseph M. Ryan, Simon Gorbaty, Thomas J. Kessler, Mitchell G. Peaks, Stephen W. Teitsworth, Crystal Noel,
• Abstract summary: Quantum First-Passage-Time Distributions (QFPTDs) remain largely unexplored and have deep implications for both fundamental physics and the development of emerging quantum technologies.<n>We develop a novel composite-phase laser pulse sequence to perform tunable stroboscopic projective measurements of the motional state of a trapped ion.<n>We measure QFPTDs of the ion energy when coupled to electric-field noise and establish a clear connection with its classical counterpart.
• Score: 0.05597620745943382
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Classical First-Passage-Time Distributions (FPTDs) have been extensively studied both theoretically and experimentally. Their quantum counterparts, Quantum First-Passage-Time Distributions (QFPTDs), remain largely unexplored and have deep implications for both fundamental physics and the development of emerging quantum technologies. We measure the first QFPTDs using a motional mode of a single trapped ion. We develop a novel composite-phase laser pulse sequence to perform tunable stroboscopic projective measurements of the motional state of a trapped ion. We measure QFPTDs of the ion energy when coupled to electric-field noise and establish a clear connection with its classical counterpart. The measurement protocol developed here is broadly applicable to other quantum systems and provides a powerful method for exploring a broad range of QFPTD phenomena. With these results we open a new field of experimental investigations of QFPT processes with potential future relevance to quantum search algorithms, unraveling connections between classical and quantum dynamics, and study of the quantum measurement problem.

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