Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session G00: Poster Session I (2pm- 5pm CST)
2:00 PM,
Tuesday, March 15, 2022
Room: McCormick Place Exhibit Hall F1
Abstract: G00.00100 : Ultra-fast and low-noise homemade cryogenic transimpedance amplifier for spin-qubit read-out
Presenter:
Heorhii Bohuslavskyi
(NTT Basic Research Laboratories, NTT Corporation, Atsugi, Kanagawa 243-0198, Japan (current address: VTT Technical Research Centre of Finland Ltd., 02044 Espoo, Finland))
Authors:
Heorhii Bohuslavskyi
(NTT Basic Research Laboratories, NTT Corporation, Atsugi, Kanagawa 243-0198, Japan (current address: VTT Technical Research Centre of Finland Ltd., 02044 Espoo, Finland))
Masayuki Hashisaka
(NTT Basic Research Laboratories, NTT Corporation, Atsugi, Kanagawa 243-0198, Japan & JST, PRESTO, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan)
Takase Shimizu
(NTT Basic Research Laboratories, NTT Corporation, Atsugi, Kanagawa 243-0198, Japan & Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan)
Takafumi Akiho
(NTT Basic Research Laboratories, NTT Corporation, Atsugi, Kanagawa 243-0198, Japan)
Koji Muraki
(NTT Basic Research Laboratories, NTT Corporation, Atsugi, Kanagawa 243-0198, Japan)
Norio Kumada
(NTT Basic Research Laboratories, NTT Corporation, Atsugi, Kanagawa 243-0198, Japan)
When the feedback resistance RFB = 50 kΩ is used, our amplifier installed on the 4 K plate of a dilution refrigerator has the noise floor of 8e-27 A2/Hz with frequency bandwidth fBW = 28 MHz. By using a higher RFB, the noise floor is lowered further at the cost of smaller fBW. We used our amplifier for a time-domain measurement of a 2 nA input square wave signal, typical for qubit charge sensors. In the case of RFB = 200 kΩ (fBW = 10 MHz), we measured a signal-to-noise ratio of 13 with 110pArms noise, which is promising for fast spin-qubit read-out.
We acknowledge funding from the Japan Society for the Promotion of Science KAKENHI (Grant No. JP19H05603 and JP21H01022) and JST PRESTO (Grant No. JP17940407).
[1] npj Quant. Inf. 3, 34 (2017)
[2] Appl. Phys. Lett. 91, 123512 (2007)
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