A physical limitation of the Wigner "distribution" function in molecular transport

作者：Baldea Ioan^*; Koeppel Horst

来源：Physics Letters, Section A: General, Atomic and Solid State Physics , 2012, 376(19): 1645-1646.

DOI：10.1016/j.physleta.2012.03.054

• Nanotransport
• Molecular electronics
• Wigner function
• Nonequilibrium phenomena

We present an example revealing that the sign of the "momentum" P of the Wigner "distribution" function f(q, P) is not necessarily associated with the direction of motion in the real world. This aspect, which is not related to the well-known limitation of the Wigner function that traces back to the Heisenberg's uncertainty principle, is particularly relevant in transport studies, wherein it is helpful to distinguish between electrons flowing from electrodes into devices and vice versa.

• 出版日期2012-4-9