Physics – Condensed Matter – Quantum Gases
Scientific paper
2009-10-18
Physics
Condensed Matter
Quantum Gases
3 pages, 0 figures; Science decided not to publish the technical comment and the reply
Scientific paper
Ho claims in his comment that our experiment is direct evidence that itinerant ferromagnetism does not exist in ultracold Fermi gases. This claim is incorrect and based on an invalid estimate of relaxation times and an erroneous interpretation of the detectability of ferromagnetic domains. We point out that the experimental evidence is consistent with the existence of ferromagnetism, but further experiments are needed to distinguish a ferromagnetic ground state from a non-magnetic ground state with ferromagnetic correlations.
Choi Jae-Hoon
Christensen Caleb A.
Jo Gyu-Boong
Ketterle Wolfgang
Kim Tony H.
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