Strong coupling of a qubit to shot noise
arXiv:cond-mat/0505132 · doi:10.1103/PhysRevB.75.165308
Abstract
We perform a nonperturbative analysis of a charge qubit in a double quantum dot structure coupled to its detector. We show that strong detector-dot interaction tends to slow down and halt coherent oscillations. The transitions to a classical and a low-temperature quantum overdamping (Zeno) regime are studied. In the latter, the physics of the dissipative phase transition competes with the effective shot noise.
5 pages, 4 figures
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