We consider the transport of electrons or excitons through a random environment in the presence of constant site off-diagonal dephasing processes. It is shown that dephasing of this form will always defeat Anderson localization at long times. Some recent theories of quantum localization which depend upon such dephasing processes are, therefore, seen to be inconsistent.
P. E. Parris and P. W. Phillips, "The Role of Dephasing in Some Recent Theories of Quantum Localization," The Journal of Chemical Physics, vol. 88, no. 6, pp. 3561-3563, American Institute of Physics (AIP), Mar 1988.
The definitive version is available at http://dx.doi.org/10.1063/1.453904
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