dc.contributor.author | Polini, Marco | eng |
dc.contributor.author | Vignale, Giovanni, 1957- | eng |
dc.date.issued | 2007 | eng |
dc.description | URL:http://link.aps.org/doi/10.1103/PhysRevLett.98.266403
DOI:10.1103/PhysRevLett.98.266403 | eng |
dc.description.abstract | Low-energy spin and charge excitations of one-dimensional interacting fermions are completely decoupled and propagate with different velocities. These modes, however, can decay due to several possible mechanisms. In this Letter we expose a new facet of spin-charge separation: not only the speeds but also the damping rates of spin and charge excitations are different. While the propagation of long-wavelength charge excitations is essentially ballistic, spin propagation is intrinsically damped and diffusive. We suggest that cold Fermi gases trapped inside a tight atomic waveguide offer the opportunity to measure the spin- drag relaxation rate that controls the broadening of a spin packet. | eng |
dc.description.sponsorship | This work was supported by NSF Grant No. DMR-
0313681. | eng |
dc.identifier.citation | Phys. Rev. Lett. 98, 266403 (2007) [4 pages] | eng |
dc.identifier.issn | 0031-9007 | eng |
dc.identifier.uri | http://hdl.handle.net/10355/7731 | eng |
dc.language | English | eng |
dc.publisher | American Physical Society | eng |
dc.relation.ispartofcollection | University of Missouri--Columbia. College of Arts and Sciences. Department of Physics and Astronomy. Physics and Astronomy publications | eng |
dc.subject | Fermions in reduced dimensions | eng |
dc.subject | degenerate Fermi gases | eng |
dc.subject | lattice fermion models | eng |
dc.subject.lcsh | Fermions | eng |
dc.subject.lcsh | Electron gas | eng |
dc.title | Spin Drag and Spin-Charge Separation in Cold Fermi Gases | eng |
dc.type | Article | eng |