Transport coefficient

A Transport coefficient $\gamma$ can be expressed via a Green-Kubo relation:

where $A$ is an observable occurring in a perturbed Hamiltonian, $\langle \cdot \rangle$ is an ensemble average and the dot above the A denotes the time derivative. For times $t$ that are greater than the correlation time of the fluctuations of the observable the transport coefficient obeys a generalized Einstein relation:

单词	Transport coefficient
释义	Transport coefficient 英语百科 Transport coefficient A Transport coefficient $\gamma$ can be expressed via a Green-Kubo relation: where $A$ is an observable occurring in a perturbed Hamiltonian, $\langle \cdot \rangle$ is an ensemble average and the dot above the A denotes the time derivative. For times $t$ that are greater than the correlation time of the fluctuations of the observable the transport coefficient obeys a generalized Einstein relation:
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