P. J. Burke, L. N. Pfeiffer, K. W. West
Published 2001-07-23, updated 2001-08-21Version 2
We measure the effect of externally applied broadband Nyquist noise on the intrinsic Nyquist dephasing rate of electrons in a two-dimensional electron gas at low temperatures. Within the measurement error, the phase coherence time is unaffected by the externally applied Nyquist noise, including applied noise temperatures of up to 300 K. The amplitude of the applied Nyquist noise from 100 MHz to 10 GHz is quantitatively determined in the same experiment using a microwave network analyzer.
Comments: 5 pages, 4 figures. Author affiliation clarified; acknowledgements modified. Replacement reason clarified
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