Spin transport in polaronic and superfluid Fermi gases
Spin transport in polaronic and superfluid Fermi gases
复制标题
极化子和超流费米气体中的自旋输运
DOI:
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发表时间:
2011
期刊:
影响因子:
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通讯作者:
M. Zwierlein
中科院分区:
文献类型:
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作者:
A. Sommer;M. Ku;M. Zwierlein
We present measurements of spin transport in ultracold gases of fermionic 6Li in a mixture of two spin states at a Feshbach resonance. In particular, we study the spin-dipole mode, where the two spin components are displaced from each other against a harmonic restoring force. We prepare a highly imbalanced, or polaronic, spin mixture with a spin-dipole excitation and we observe strong, unitarity-limited damping of the spin-dipole mode. In gases with small spin imbalance, below the Pauli limit for superfluidity, we observe strongly damped spin flow even in the presence of a superfluid core. This indicates strong mutual friction between superfluid and polarized normal spins, possibly involving Andreev reflection at the superfluid–normal interface.
影响因子:
2.9
作者:
A. Recati;Carlos Lobo;S. Stringari
通讯作者:
A. Recati;Carlos Lobo;S. Stringari