Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
Spin dephasing in pseudomagnetic fields: susceptibility and geometry
Репозиторій DSpace/Manakin
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Spin dephasing in pseudomagnetic fields: susceptibility and geometry
Тема:
К 100-летию со дня рождения К.Б. Толпыго
Інший ID:
PACS: 03.75.Ss, 05.30.Fk, 67.85.–d
Посилання:
Spin dephasing in pseudomagnetic fields: susceptibility and geometry / I.V. Tokatly E.Ya. Sherman // Физика низких температур. — 2016. — Т. 42, № 5. — С. 506-512. — Бібліогр.: 30 назв. — англ.
Підтримка:
We acknowledges funding by the Spanish MEC
(FIS2010–21282-C02–01 and FIS2012–36673-C03–01)
and “Grupos Consolidados UPV/EHU del Gobierno Vasco”
(IT-319–07 and IT-472–10). The contribution of EYS
was, in addition, supported by the University of Basque
Country UPV/EHU under program UFI 11/55.
Дата:
2016
Переглядів:
670
Завантажень:
369
Анотація:
We present a theory of spin dynamics caused by spin-orbit coupling for two-dimensional gases of cold atoms and other quasiparticles with pseudospin 1/2 moving in orbital gauge fields. Our approach is based on the gauge transformation in the form of a SU(2) rotation gauging out the spin-orbit coupling. As a result, the analysis of the spin dynamics is reduced to calculation of the density-related susceptibility of the system without spin-orbit coupling at the wavevector determined by the spin-rotation length. This approach allows one to treat the spin dynamics in terms of the linear response theory for bosonic and fermionic ensembles. We study different regimes of irreversible spin relaxation and coherent spin dynamics in these systems. For bosonic gases the effects of low temperature are crucial due to accumulation of particles in the small-momentum subspace even if the Bose–Einstein condensation does not occur due to the system low dimensionality.
