Starting spectroscopy on 2.6 cav fundamental mode
#1 Updated by Silvia Zorzetti almost 2 years ago
Spectroscopy done, found 2 peaks, 2.590817GHz, 2.5910375GHz. Running a finer sweep around both peaks. Also, it has to be noticed that at "high" power, about 25dBm from the generator the cavity and qubit look already dispersively coupled.
#2 Updated by Silvia Zorzetti almost 2 years ago
- File 7376084126mag.png 7376084126mag.png added
- File 7376084126mag_norm.png 7376084126mag_norm.png added
Dispersive shift about +135Hz. However it is difficult to compute as at higher power the cavity is already in dispersive regime.
Delta=Omega_r-Omega_q>0 -> Omega_r>Omega_q.
I find unlucky that the qubit frequency is lower than the cavity. Investigating this issue.
#7 Updated by Silvia Zorzetti almost 2 years ago
I checked the last measurement data (December 2018). There is a mode at the flange at 5.7GHz. This gives confidence that the 5.602GHz found now is instead qubit mode. I am working on this.
See the attached file from the run on December.