### Dyson Equations for Green Functions of Electrons in Open Single-level Quantum Dot

*Nguyen Van Hieu, Nguyen Bich Ha, Nguyen Van Hop*

#### Tóm tắt

The infinite system of differential equations for the nonequilibrium Green functions

of electrons in a single-level quantum dot connected with two conducting leads is truncated by

applying the mean-field approximation to the mean values of the products of four operators. As

the result the system of Dyson equations for the two-point real-time nonequilibrium Green functions

in the Keldysh formalism as well as that of the two-point imaginary-time Green functions

are derived.

of electrons in a single-level quantum dot connected with two conducting leads is truncated by

applying the mean-field approximation to the mean values of the products of four operators. As

the result the system of Dyson equations for the two-point real-time nonequilibrium Green functions

in the Keldysh formalism as well as that of the two-point imaginary-time Green functions

are derived.