This second lecture on spin qubits is given by Menno Veldhorst. Menno will explain to you the basics of how to manipulate the states of the electron spins. He will also elaborate on the challenges that spin qubits face in the quest to a functioning spin qubit quantum processor.

Main take-aways

• Applying a magnetic field on a quantum dots causes Zeeman splitting in the energy level of the qubit states. The g-factor gives a measure for this splitting with regards to the magnetic field strength.
• Qubit control can be realized by introducting an alternating magnetic field in a direction perpendicular to the applied magnetic field, causing Rabi oscillations.
• Exchange interaction is the mechanis behind coupling of two qubits.
• Using either quantum buses or coupling to photons in superconducting microwave cavities, small arrays can be coupled together.