Quantum suppression of cold reactions far from the s-wave energy limit

• URL: http://arxiv.org/abs/2208.07725v2
• Date: Wed, 29 Jan 2025 22:59:45 GMT
• Title: Quantum suppression of cold reactions far from the s-wave energy limit
• Authors: Or Katz, Meirav Pinkas, Nitzan Akerman, Ming Li, Roee Ozeri,
• Abstract summary: We study resonant charge-exchange reactions between individual cold pairs of neutral $87$Rb atoms and optically-inaccessible $87$Rb$+$ ions far above the $s$-wave regime.<n>Our results indicate that even at temperatures three orders of magnitude higher than the ultracold $s$-wave regime, quantum interference in collisions persists and impacts reaction rates.
• Score: 4.426312217102122
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Reactions between pairs of atoms are ubiquitous processes in chemistry and physics. Quantum scattering effects on reactions often require extremely ultracold temperatures, approaching the $s$-wave regime, with a small number of partial waves involved. At higher temperatures, the different phases associated with the centrifugal barriers of different partial waves average out quantum interference to yield classical reaction rates. Here, we use quantum-logic to experimentally study resonant charge-exchange reactions between individual cold pairs of neutral $^{87}$Rb atoms and optically-inaccessible $^{87}$Rb$^{+}$ ions far above the $s$-wave regime. We find that the measured charge-exchange rate is significantly suppressed with respect to the classical prediction. Our results indicate that even at temperatures three orders of magnitude higher than the ultracold $s$-wave regime, quantum interference in collisions persists and impacts reaction rates.

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