Spin dynamics from Majorana fermions

W Mao, P Coleman, Christopher Hooley, D Langreth

Research output: Contribution to journalArticle


Using the Majorana fermion representation of spin-1/2 local moments, we show how the dynamic spin correlation and susceptibility are obtained directly from the one-particle Majorana propagator. We illustrate our method by applying it to the spin dynamics of a nonequilibrium quantum dot, computing the voltage-dependent spin relaxation rate and showing that, at weak coupling, the fluctuation-dissipation relation for the spin of a quantum dot is voltage dependent. We confirm the voltage-dependent Curie susceptibility recently found by Parcollet and Hooley [Phys. Rev. B 66, 085315 (2002)]].
Original languageEnglish
Pages (from-to)207203
Number of pages1
JournalPhysical Review Letters
Issue number20
Early online date1 Nov 2003
Publication statusPublished - 1 Nov 2003


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