| Autor: |
Philip D, Gregory, Jacob A, Blackmore, Sarah L, Bromley, Simon L, Cornish |
| Rok vydání: |
2020 |
| Zdroj: |
Physical review letters. 124(16) |
| ISSN: |
1079-7114 |
| Popis: |
We show that the lifetime of ultracold ground-state ^{87}Rb^{133}Cs molecules in an optical trap is limited by fast optical excitation of long-lived two-body collision complexes. We partially suppress this loss mechanism by applying square-wave modulation to the trap intensity, such that the molecules spend 75% of each modulation cycle in the dark. By varying the modulation frequency, we show that the lifetime of the collision complex is 0.53±0.06 ms in the dark. We find that the rate of optical excitation of the collision complex is 3_{-2}^{+4}×10^{3} W^{-1} cm^{2} s^{-1} for λ=1550 nm, leading to a lifetime of100 ns for typical trap intensities. These results explain the two-body loss observed in experiments on nonreactive bialkali molecules. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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