2013
DOI: 10.1103/physrevlett.111.190402
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Spin Drag of a Fermi Gas in a Harmonic Trap

Abstract: Using a Boltzmann equation approach, we analyze how the spin drag of a trapped interacting fermionic mixture is influenced by the nonhomogeneity of the system in a classical regime where the temperature is much larger than the Fermi temperature. We show that for very elongated geometries, the spin damping rate can be related to the spin conductance of an infinitely long cylinder. We characterize analytically the spin conductance both in the hydrodynamic and collisionless limits and discuss the influence of the… Show more

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Cited by 11 publications
(10 citation statements)
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“…For the Bose system, the spin dynamics of the Bose-Einstein condensation has attracted much attention. [1][2][3][4][5][6][7][8] For the Fermi cold atoms, the systems without [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] and with [26][27][28][29][30][31][32] spin-orbit coupling (SOC) are extensively investigated. In the absence of the SOC, many interesting phenomena, such as the Leggett-Rice effect in unitary gas [17][18][19][20][21] and anomalous spin segregation in extremely weak scattering limit, [22][23][24][25] have enriched the understanding of the spin dynamics of Fermions.…”
Section: Introductionmentioning
confidence: 99%
“…For the Bose system, the spin dynamics of the Bose-Einstein condensation has attracted much attention. [1][2][3][4][5][6][7][8] For the Fermi cold atoms, the systems without [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] and with [26][27][28][29][30][31][32] spin-orbit coupling (SOC) are extensively investigated. In the absence of the SOC, many interesting phenomena, such as the Leggett-Rice effect in unitary gas [17][18][19][20][21] and anomalous spin segregation in extremely weak scattering limit, [22][23][24][25] have enriched the understanding of the spin dynamics of Fermions.…”
Section: Introductionmentioning
confidence: 99%
“…Moreover, despite the local character of the interactions, collective phenomena were observed, including demagnetization and transverse spinwaves in the former, and a time-dependent separation (segregation) of the spin densities and spin self-rephasing in the latter. Although mean-field and kinetic theory formulations have explained some of these phenomena [8][9][10][11][12][13][14][15][16][17][18], a theory capable of describing all the time scales and the interplay between spin, motion, and interactions has not been developed.In this work, we develop a framework that accounts for the coupling of spin and motion in weakly interacting Fermi gases. We qualitatively reproduce and explain all phenomena of the aforementioned experiments and obtain quantitative agreement with the results of Ref.…”
mentioning
confidence: 99%
“…Moreover, despite the local character of the interactions, collective phenomena were observed, including demagnetization and transverse spinwaves in the former, and a time-dependent separation (segregation) of the spin densities and spin self-rephasing in the latter. Although mean-field and kinetic theory formulations have explained some of these phenomena [8][9][10][11][12][13][14][15][16][17][18], a theory capable of describing all the time scales and the interplay between spin, motion, and interactions has not been developed.…”
mentioning
confidence: 99%
“…Recently there has been much experimental progress studying spin diffusion [1][2][3][4][5][6][7][8][9] and spin segregation dynamics (time-dependent separation of the spatial distributions of the spin components) [10][11][12][13][14][15][16] in trapped atomic gases. A typical experimental protocol consists of preparing a transversely spin-polarized gas and then observing the spin relaxation dynamics under the influence of a magnetic field gradient.…”
Section: Introductionmentioning
confidence: 99%