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10.2.3 Boundary Conditions

A different numerical issue is the formulation of boundary conditions without introduction of artificial reflection [RFK89]. What is actually modeled in the Wigner equation is not so clear, as artificial reflection of outgoing waves occurs. Only in the limit of infinitely long electrodes the posed BCs are absorbing.

The QTBM suffers from the problem that in the non-stationary case the absorbing boundary conditions become non-local in time, that is, the equation has a ``memory''.

previous up next contents Previous: 10.2.2 Mesh Size Up: 10.2 Discussion of Discrepancy Next: 10.2.4 Effective Mass Model

R. Kosik: Numerical Challenges on the Road to NanoTCAD