Poor qubits make for rich physics: noise-induced quantum Zeno effects and noise-induced Berry phases
arXiv:0906.2368 · doi:10.1063/1.3140502
Abstract
We briefly review three ways that environmental noise can slow-down (or speed-up) quantum transitions; (i) Lamb shifts, (ii) over-damping and (iii) orthogonality catastrophe. We compare them with the quantum Zeno effect induced by observing the system. These effects are relevant to poor qubits (those strongly coupled to noise). We discuss Berry phases generated by the orthogonality catastrophe, and argue that noise may make it easier to observe Berry phases.
arXiv comment6 pages - Proceedings of International Conference on Noise and Fluctuations (Pisa, 14-19 June 2009) - Improved with respect to version in Conf. Proc