| Autor: |
Jarvis, K. N., Devlin, J. A., Wall, T. E., Sauer, B. E., Tarbutt, M. R. |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Phys. Rev. Lett. 120, 083201 (2018) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.120.083201 |
| Popis: |
We present the properties and advantages of a new magneto-optical trap (MOT) where blue-detuned light drives `type-II' transitions that have dark ground states. Using $^{87}$Rb, we reach a radiation-pressure-limited density exceeding $10^{11}$cm$^{-3}$ and a temperature below 30$\mu$K. The phase-space density is higher than in normal atomic MOTs, and a million times higher than comparable red-detuned type-II MOTs, making it particularly attractive for molecular MOTs which rely on type-II transitions. The loss of atoms from the trap is dominated by ultracold collisions between Rb atoms. For typical trapping conditions, we measure a loss rate of $1.8(4)\times10^{-10}$cm$^{3}$s$^{-1}$. |
| Databáze: |
arXiv |
| Externí odkaz: |
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