2022/12/31 by B. Thyagarajan, Thyagarajan, Bhargava, S. Kanhirathingal +9
Computer Science · Engineering · #FOS: Physical sciences #Mesoscale and Nanoscale Physics (cond-mat.mes-hall) #Neural Networks and Reservoir Computing #Photonic and Optical Devices #Quantum Information and Cryptography #Quantum Physics (quant-ph) #Superconductivity (cond-mat.supr-con)
paper · pdf · doi:10.48550/arxiv.2301.00110
openalex publication_date 2022/12/31 · openalex created_date 2023/01/06 · openalex updated_date 2026/07/28
Operating the cavity-embedded Cooper pair transistor (cCPT) in the Kerr bistable regime, we demonstrate single-shot resolution between two charge states that are 0.09e apart. The measurement is performed with 94% fidelity in a duration of 3 μs. The drive power at which the measurement is performed corresponds to only 20 intracavity photons on average in the high oscillation amplitude state of the cCPT, which is orders-of-magnitude smaller than that in rf-SETs. We find that the limiting factor for this mode of operation of the cCPT is the spontaneous fluctuation-induced switching between the two metastable oscillation amplitude states. We present empirical data on the variation of the switching dynamics with drive parameters and cCPT DC bias.