Qubit-Coupled Mechanics - IFSC
Qubit-Coupled Mechanics - IFSC
Qubit-Coupled Mechanics - IFSC
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Next step: Dispersive measurements of the number-state<br />
statistics of a mechanical mode<br />
Perform spectroscopy on the qubit<br />
while it is coupled to the<br />
mechanical resonator<br />
ω<br />
= 300 MHz<br />
2π<br />
χ<br />
= 0.6 MHz<br />
2π<br />
k B T~1.7ħω<br />
<strong>Qubit</strong> Linewidth<br />
γ qq<br />
= 0.5 MHz<br />
2π<br />
Absorption spectrum of qubit<br />
for nanoresonator in thermal<br />
state at T = 25 mm<br />
Absorption<br />
Rate (A.U.)<br />
*Calculations based on CLERK & UTAMI, PRA 75, 042302 (2007)<br />
‘Stark’-Shifted <strong>Qubit</strong> Transitions<br />
N = 2<br />
N = 1<br />
N = 0<br />
…<br />
N = 0<br />
Simulation of Stark Shift<br />
…<br />
∆E + ħχ<br />
|−⟩ |+⟩<br />
2<br />
∆E + 5ħχ<br />
1<br />
∆E + 3ħχ<br />
N = 1<br />
0.1 1.0 10<br />
ω s − ΔE (MHz)<br />
0<br />
N = 2
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