Continuous and Pulsed Quantum Zeno Effect

Details Continuous and Pulsed Quantum Zeno Effect Continuous and Pulsed Quantum Zeno Effect

2006-06-15

arxiv.org/abs/cond-mat/0606430v1

Physics

Condensed Matter

Other Condensed Matter

5 pages, 4 figures

Scientific paper

Continuous and pulsed quantum Zeno effects were observed using a $^{87}$Rb Bose-Einstein condensate(BEC). Oscillations between two ground hyperfine states of a magnetically trapped condensate, externally driven at a transition rate $\omega_R$, were suppressed by destructively measuring the population in one of the states with resonant light. The suppression of the transition rate in the two level system was quantified for pulsed measurements with a time interval $\delta t$ between pulses and continuous measurements with a scattering rate $\gamma$. We observe that the continuous measurements exhibit the same suppression in the transition rate as the pulsed measurements when $\gamma\delta t=3.60(0.43)$, in agreement with the predicted value of 4. Increasing the measurement rate suppressed the transition rate down to $0.005\omega_R$.

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