Abstract
The effect of an invasive voltage probe on the phase-coherent conduction through a ballistic chaotic cavity is investigated by random-matrix theory. The entire distribution P(G) of the conductance G is computed for the case that the cavity is coupled to source and drain by two point contacts with a quantized conductance of 2/h, both in the presence (β=1) and absence (β=2) of time-reversal symmetry. The loss of phase coherence induced by the voltage probe causes a crossover from P(G)∝ to a Gaussian centered at G=/h with a β-dependent width.
- Received 20 October 1994
DOI:https://doi.org/10.1103/PhysRevB.51.7739
©1995 American Physical Society