| Autor: |
Xie, T., Lepers, M., Vexiau, R., Orban, A., Dulieu, O., Bouloufa-Maafa, N. |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Phys. Rev. Lett. 125, 153202 (2020) |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.125.153202 |
| Popis: |
We propose a method to suppress the chemical reactions between ultracold bosonic ground-state $^{23}$Na$^{87}$Rb molecules based on optical shielding. By applying a laser with a frequency blue-detuned from the transition between the lowest rovibrational level of the electronic ground state $X^1\Sigma^+ (v_X=0, j_X=0)$, and the long-lived excited level $b^3\Pi_0 (v_b=0, j_b=1)$, the long-range dipole-dipole interaction between the colliding molecules can be engineered, leading to a dramatic suppression of reactive and photoinduced inelastic collisions, for both linear and circular laser polarizations. We demonstrate that the spontaneous emission from $b^3\Pi_0 (v_b=0, j_b=1)$ does not deteriorate the shielding process. This opens the possibility for a strong increase of the lifetime of cold molecule traps, and for an efficient evaporative cooling. We also anticipate that the proposed mechanism is valid for alkali-metal diatomics with sufficiently large dipole-dipole interactions. |
| Databáze: |
arXiv |
| Externí odkaz: |
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