Semiconductor Spin Qubit Arrays in the Second Dimension
8 August 2019
Seminar by Dr Anasua Chatterjee from the University of Cophenhagen.
HOST: Prof John Morton
SPEAKER: Dr Anasua Chatterjee | Center for Quantum Devices, Niels Bohr Institute, and University of Copenhagen
TIME&VENUE: Monday | 16th September, 2019 | 11:00 AM | Room A1/3, Fourth Floor | Physics Building, UCL
TITLE: Semiconductor Spin Qubit Arrays in the Second Dimension
ABSTRACT: The scalability of quantum information platforms is predicated on the ability to coherently manipulate quantum objects organised in addressable arrays. Recently, linear quantum dot arrays have successfully demonstrated quantum simulation and electron shuttling experiments. However, the extension of these quantum arrays into the second dimension is still almost unexplored. For a scalable array of electron spin qubits implemented in quantum dots, fine control and tuning of the dot potentials and tunnel couplings are required. I will present experiments in the spin qubit team using techniques such as fast RF-reflectometry readout, single-electron charge sensing and local single-shot spin readout of singlet-triplet spin qubits to tune and manipulate 2D arrays. These experiments are performed in gate-defined arrays of quantum dots in GaAs heterostructures as well as in silicon-on-insulator (SOI) devices fabricated on a foundry-compatible silicon CMOS platform.