A major controversy has surrounded the stability of superfluidity in spin-polarized Fermi gas systems with resonant interactions when the 'up' and 'down' spin components are imbalanced. This problem is explored for a Fermi gas of 6Li atoms, using tomographic techniques to map out the superfluid phases as the temperature and density imbalance are varied. Evidence is found for various types of phase transitions, enabling quantitative tests of theoretical calculations on the stability of resonant superfluidity.
- Yong-il Shin
- Christian H. Schunck
- Wolfgang Ketterle
