Semiconductor Spin Qubit Arrays in the Second Dimension

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.