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NMR relaxation times for a dilute polarized fermi gas

✍ Scribed by W.J. Mullin; F. Laloë; M.G. Richards

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
222 KB
Volume
165-166
Category
Article
ISSN
0921-4526

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✦ Synopsis

We calculate the longitudinal relaxation time Tt for a polarized Boltzmann spin+ Fermi gas. We show that Tl is independent of polarization of the gas. At high T, where the thermal wavelength X is small compared to the scattering length a, Tt is proportional T 1'2, while at low T, such that X is greater than a, Tt is proportional to T-112. Tt thus has a minimum at some intermediate temperature confirming the numerical results of Shizgal. The existence of the minimum does not depend on the presence of an attractive part of the potential. As an example of the expected temperature dependence we calculate Tt numerically for a hard core gas.

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