Bang-Bang refocusing of a qubit exposed to telegraph noise

Details Bang-Bang refocusing of a qubit exposed to telegraph noise Bang-Bang refocusing of a qubit exposed to telegraph noise

2004-12-16

arxiv.org/abs/cond-mat/0412452v1

Quantum Information Processing, Vol. 3, 247 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We investigate the decoherence effect of telegraph noise on a single qubit, usually provoked by bistable fluctuators. To diminish the dephasing and relaxation impact an effective refocusing scheme (so-called Bang-Bang pulses) is proposed. Detailed numerical as well as analytical random walk analysis allows in particular to evaluate the applicability of non-perfect Bang-Bang pulses.

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