Poor qubits make for rich physics: noise-induced quantum Zeno effects and noise-induced Berry phases

Details Poor qubits make for rich physics: noise-induced quantum Zeno effects and noise-induced Berry phases Poor qubits make for rich physics: noise-induced quantum Zeno effects and noise-induced Berry phases

2009-06-12

arxiv.org/abs/0906.2368v1

AIP Conf. Proc. 1129, 469 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages - Proceedings of International Conference on Noise and Fluctuations (Pisa, 14-19 June 2009) - Improved with respect to

Scientific paper

10.1063/1.3140502

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.

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