Details

Autor(en) / Beteiligte

• Wacker, L J
• Jørgensen, N B
• Birkmose, D
• Winter, N
• Mikkelsen, M
• Sherson, J
• Zinner, N
• Arlt, J J

Titel

Universal Three-Body Physics in Ultracold KRb Mixtures

Ist Teil von

• Physical review letters, 2016-10, Vol.117 (16), p.163201-163201, Article 163201

Ort / Verlag

United States

Erscheinungsjahr

2016

Quelle

PROLA - Physical Review Online Archive

Beschreibungen/Notizen

• Ultracold atomic gases have recently become a driving force in few-body physics due to the observation of the Efimov effect. While initially observed in equal mass systems, one expects even richer few-body physics in the heteronuclear case. In previous experiments with ultracold mixtures of potassium and rubidium, an unexpected nonuniversal behavior of Efimov resonances was observed. In contrast, we measure the scattering length dependent three-body recombination coefficient in ultracold heteronuclear mixtures of ^{39}K-^{87}Rb and ^{41}K-^{87}Rb and do not observe any signatures of Efimov resonances for accessible scattering lengths in either mixture. Our results show good agreement with our theoretical model for the scattering dependent three-body recombination coefficient and reestablish universality across isotopic mixtures.