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Keldysh diagram technique for strongly correlated systems

Show simple item record DOHOTARU, Leonid 2019-02-13T10:29:14Z 2019-02-13T10:29:14Z 2018
dc.identifier.citation DOHOTARU, Leonid. Keldysh diagram technique for strongly correlated systems. In: Conferința Tehnico-Științifică a Colaboratorilor, Doctoranzilor și Studenților, Universitatea Tehnică a Moldovei, 16-18 noiembrie, 2017. Chișinău, 2018, vol. 1, pp. 545-546. ISBN 978-9975-45-543-5. ISBN 978-9975-45-544-2 (Vol.1). en_US
dc.identifier.isbn 978-9975-45-543-5
dc.description.abstract The non - equilibrium theory of strongly correlated systems is proposed theory which is grounded on the generalized Wick theorem. This theorem is employed for calculation of the thermal averages of the contour arranged products of electron operators by generalizing Keldysh formalism. Perturbation expansion is realized for Anderson impurity model in which we consider the Coulomb interaction of the impurity electrons as a main parameter of the model and the mixing interaction between impurity and conduction electrons as a perturbation. The first two approximations are used for obtained the value of the current between one of the leads and central region of interacting electrons. The contribution of the strong correlations and of irreducible diagrams is analyzed. en_US
dc.language.iso en en_US
dc.publisher Tehnica UTM en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri *
dc.subject Keldysh diagram technique en_US
dc.subject non-equilibrium state en_US
dc.subject Green’s function en_US
dc.subject Anderson impurity model en_US
dc.title Keldysh diagram technique for strongly correlated systems en_US
dc.type Article en_US

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