Strong coupling of a qubit to shot noise

Details Strong coupling of a qubit to shot noise Strong coupling of a qubit to shot noise

2005-05-05

arxiv.org/abs/cond-mat/0505132v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures

Scientific paper

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.

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