and nanomechanical resonators on an atom chip
and nanomechanical resonators on an atom chip
and nanomechanical resonators on an atom chip
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Coherence close to the surface<br />
P. Treutlein et al., Phys. Rev. Lett. 92, 203005 (2004).<br />
Hyperfine sublevels of 87 Rb with<br />
identical magnetic moments<br />
Coherence lifetime measurement<br />
(Ramsey sequence, <strong>atom</strong>-surface dist<strong>an</strong>ce: 9 μm)<br />
rf<br />
|1〉 = |F=2,m F<br />
=+1〉<br />
F = 2<br />
mw<br />
|0〉 = |F=1,m F<br />
=-1〉<br />
F = 1<br />
m F<br />
= -2 -1 0 1 2<br />
“Qubit states“ of 87 Rb<br />
• both magnetically trappable<br />
• nearly identical potentials<br />
• l<strong>on</strong>g coherence lifetime
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