Dr Fernando Gonzalez-Zalba

Research Interests

• Low power information and communication technologies
• Single-electron devices and circuits
• Quantum Information Processing
• Single-electron devices and circuits
• High-frequency charge sensing
• Fast-driven two-level systems

I joined the Hitachi Cambridge Laboratory in 2012 after the completion of a PhD in Single-Atom Electronics at the University of Cambridge. I was appointed Senior Research Scientist in 2015 and I am currently working in the area of quantum information processing and low-power electronics. One of my main interests is the design and integration of single electron nano-electronic devices in logic circuits for low-power applications. I explore single-electron transistors, single-atom transistors, single-molecule transistors(Nano Lett. 14 5672) and magnetic single-electron transistors as a route towards enhancing the functionality of logic circuits for the Beyond CMOS era. Additionally, I work on the design and development of a silicon-based physical platform to store and process quantum information. My research in this field focuses on developing a CMOS-based quantum computing architecture using state-of-the-art CMOS transistor technology. My efforts are devoted to simplifying the architecture by reducing the complexity of the quantum circuit using novel high-frequency techniques such as “gate-based radio-frequency reflectometry”. This technique allows charge-sensing without the need of external electrometers and performs at equivalent levels of sensitivity (Nat Commun 6 6084). Besides, it allows probing the dynamics of fast-driven two-levels systems (or qubits) leading to beautiful quantum phenomena such as Landau-Zener-Stuckelberg interferometry (Nano Lett. 16 1614), Pauli spin-blockade (Nano Lett. 15 4622, PRX 5 031024) or Sisyphus dissipation (Nat Commun 6 6084). Recently, I have been working on integration CMOS digital and quantum electronics to facilitate data management in large scale quantum processors (Phys. Rev. Applied 9, 054016).

Recent Research projects

• TOLOP: Towards Low Power Information and Communication Technologies, FP7-ICT. Future and Emerging Technologies Proactive, MINECC (Grant: 318397)
  Project Coordinator and Dissemination Work Package Leader
• MOSQUITO: Metal-Oxide Semiconductor Quantum Technologies, H2020-ICT-25. Generic micro- and nano-electronics technologies (Grant: 688539)
  Participant for Hitachi Europe Ltd.
• ICT-Energy –Coordinating research efforts of the ICT-Energy Community, FP7-ICT. Future and Emerging Technologies Proactive (Grant: 611004)
  Participant for Hitachi Europe Ltd.
• Winton Pump Prime, Time-resolved gate-based sensing for scalable silicon-based quantum computing
  Participant for Hitachi Europe Ltd.

Last Publications

• J. M. A. Chawner, S. Barraud, M. F. Gonzalez-Zalba, S. Holt, E. A. Laird, Y. A. Pashkin, and J. R. Prance, Phys. Rev. Appl. 15, 034044 (2021), Non-galvanic calibration and operation of a quantum dot thermometer

• V. D. Maman, M. F. Gonzalez-Zalba, and A. Palyi, Phys. Rev. Appl. 14, 6, 064024 (2020), Charge Noise and Overdrive Errors in Dispersive Readout of Charge, Spin, and Majorana Qubits

• T. Lundberg, J. Li, L. Hutin, B. Bertrand, D. J. Ibberson, C. M. Lee, D. J. Niegemann, M. Urdampilleta, N. Stelmashenko, T. Meunier, J. W. A. Robinson, L. Ibberson, M. Vinet, Y. M. Niquet, and M. F. Gonzalez-Zalba, Phys. Rev. X 10, 4, 041010 (2020), Spin Quintet in a Silicon Double Quantum Dot: Spin Blockade and Relaxation