QmeQ is an open-source Python package for calculations of transport through quantum dot devices. The so-called Anderson-type models are used to describe the quantum dot device, where quantum dots are coupled to the leads by tunneling. QmeQ can calculate the stationary state particle and energy currents using various approximate density matrix approaches. As for now we have implemented the following first-order methods
- Pauli (classical) master equation
- Lindblad approach
- Redfield approach
- First order von Neumann (1vN) approach
which can describe the effect of Coulomb blockade. QmeQ also has two second-order methods
- Second order von Neumann (2vN) approach
- Real Time Diagrammatic approach
which can additionally address cotunneling, pair tunneling, and broadening effects.