Continuous and pulsed quantum zeno effect

Continuous and pulsed quantum Zeno effects were observed using a 87Rb Bose-Einstein condensate. 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...

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Veröffentlicht in:Physical review letters 2006-12, Vol.97 (26), p.260402-260402, Article 260402
Hauptverfasser: Streed, Erik W, Mun, Jongchul, Boyd, Micah, Campbell, Gretchen K, Medley, Patrick, Ketterle, Wolfgang, Pritchard, David E
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Sprache:eng
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Zusammenfassung:Continuous and pulsed quantum Zeno effects were observed using a 87Rb Bose-Einstein condensate. 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 deltat 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 gammadeltat=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).
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.97.260402