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A Fully Integrated DAC for CMOS Position-Based Charge Qubits with Single-Electron Detector Loopback Testing

2020; Institute of Electrical and Electronics Engineers; Volume: 3; Linguagem: Inglês

10.1109/lssc.2020.3018707

2573-9603

Ali Esmailiyan, Hongying Wang, Mike Asker, Eugene Koskin, D. Leipold, Imran Bashir, Kai Xu, Anna Kozioł, Elena Blokhina, Robert Bogdan Staszewski,

Advancements in Semiconductor Devices and Circuit Design

This letter presents a fully integrated interface circuitry with a position-based charge qubit structure implemented in 22-nm FDSOI CMOS. The quantum structure is controlled by a tiny capacitive DAC (CDAC) that occupies 3.5×45 μm 2 and consumes 0.27mW running at a 2-GHz system clock. The state of the quantum structure is measured by a single-electron detector that consumes 1 mW (including its output driver) with an area of 40×25 μm 2 . The low power and miniaturized layout of these circuits pave the way for integration in a large quantum core with thousands of qubits, which is a necessity for practical quantum computers. The CDAC output noise of 12 μV-rms is estimated through mathematical analysis while the ≤ 0.225 mV-rms input referred noise of the detector is verified by measurements at 3.4K. The functionality of the system and performance of the CDAC are verified in a loopback mode with the detector sensing the CDAC-induced electron tunneling from the floating diffusion node into the quantum structure.