Accurate determination of the scattering length of erbium atoms
Accurate determination of the scattering length of erbium atoms
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准确测定铒原子的散射长度
DOI:
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
F. Ferlaino
中科院分区:
文献类型:
--
作者:
A. Patscheider;L. Chomaz;G. Natale;D. Petter;M. Mark;S. Baier;B. Yang;R. Wang;J. Bohn;F. Ferlaino
An accurate knowledge of the scattering length is fundamental in ultracold quantum gas experiments and essential for the characterisation of the system as well as for a meaningful comparison to theoretical models. Here, we perform a careful characterisation of the s-wave scattering length $a_s$ for the four highest-abundance isotopes of erbium, in the magnetic field range from 0G to 5G. We report on cross-dimensional thermalization measurements and apply the Enskog equations of change to numerically simulate the thermalization process and to analytically extract an expression for the so-called number of collisions per re-thermalization (NCPR) to obtain $a_s$ from our experimental data. We benchmark the applied cross-dimensional thermalization technique with the experimentally more demanding lattice modulation spectroscopy and find good agreement for our parameter regime. Our experiments are compatible with a dependence of the NCPR with $a_s$, as theoretically expected in the case of strongly dipolar gases. Surprisingly, we experimentally observe a dependency of the NCPR on the density, which might arise due to deviations from an ideal harmonic trapping configuration. Finally, we apply a model for the dependency of the background scattering length with the isotope mass, allowing to estimate the number of bound states of erbium.
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影响因子:
2.9
作者:
T. Maier;I. Ferrier-Barbut;H. Kadau;M. Schmitt;Matthias Wenzel;Clarissa Wink;T. Pfau;K. Jachymski;P. Julienne
通讯作者:
T. Maier;I. Ferrier-Barbut;H. Kadau;M. Schmitt;Matthias Wenzel;Clarissa Wink;T. Pfau;K. Jachymski;P. Julienne
影响因子:
64.8
作者:
Valtolina G;Matsuda K;Tobias WG;Li JR;De Marco L;Ye J
通讯作者:
Ye J
影响因子:
2.9
作者:
Wang, Reuben R.;Bohn, John L.
通讯作者:
Bohn, John L.
影响因子:
2.9
作者:
Wang, Reuben R.;Sykes, Andrew G.;Bohn, John L.
通讯作者:
Bohn, John L.
影响因子:
12.5
作者:
Maier, T.;Kadau, H.;Kotochigova, S.
通讯作者:
Kotochigova, S.