Quantum mechanical limitations to spin diffusion in the unitary Fermi gas

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ENSS, Tilman, Rudolf HAUSSMANN, 2012. Quantum mechanical limitations to spin diffusion in the unitary Fermi gas. In: Physical Review Letters. 109(19). ISSN 0031-9007. eISSN 1079-7114

@article{Enss2012Quant-22025, title={Quantum mechanical limitations to spin diffusion in the unitary Fermi gas}, year={2012}, doi={10.1103/PhysRevLett.109.195303}, number={19}, volume={109}, issn={0031-9007}, journal={Physical Review Letters}, author={Enss, Tilman and Haussmann, Rudolf} }

<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bibo="http://purl.org/ontology/bibo/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > <rdf:Description rdf:about="https://kops.uni-konstanz.de/rdf/resource/123456789/22025"> <dcterms:issued>2012</dcterms:issued> <dc:contributor>Haussmann, Rudolf</dc:contributor> <dc:creator>Enss, Tilman</dc:creator> <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2013-02-22T10:51:26Z</dcterms:available> <dc:rights>deposit-license</dc:rights> <dcterms:abstract xml:lang="eng">We compute spin transport in the unitary Fermi gas using the strong-coupling Luttinger-Ward theory. In the quantum degenerate regime the spin diffusivity attains a minimum value of $D_s \simeq 1.3 \hbar/m$ approaching the quantum limit of diffusion for a particle of mass $m$. Conversely, the spin drag rate reaches a maximum value of $\Gamma_\sd \simeq 1.2 k_B T_F/\hbar$ in terms of the Fermi temperature $T_F$. The frequency-dependent spin conductivity $\sigma_s(\omega)$ exhibits a broad Drude peak, with spectral weight transferred to a universal high-frequency tail $\sigma_s(\omega \to\infty) = \hbar^{1/2}C/3\pi(m\omega)^{3/2}$ proportional to the Tan contact density $C$. For the spin susceptibility $\chi_s(T)$ we find no downturn in the normal phase.</dcterms:abstract> <dc:language>eng</dc:language> <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/22025"/> <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2013-02-22T10:51:26Z</dc:date> <dc:contributor>Enss, Tilman</dc:contributor> <dcterms:rights rdf:resource="http://nbn-resolving.org/urn:nbn:de:bsz:352-20140905103605204-4002607-1"/> <dcterms:title>Quantum mechanical limitations to spin diffusion in the unitary Fermi gas</dcterms:title> <dc:creator>Haussmann, Rudolf</dc:creator> <dcterms:bibliographicCitation>Physical Review Letters ; 109 (2012), 19. - 195303</dcterms:bibliographicCitation> </rdf:Description> </rdf:RDF>

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