In this lecture, Professor Lieven Vandersypen introduces the principle of the spin qubits. As the name reveals, this qubit approach concerns coherent control of the spins of trapped electrons. These electrons are trapped in so-called quantum dots. Enjoy module 2!

Main takeaways

• In quantum dots, single electrons can be confined to be used as quantum bits.
• Spin qubits have to be operated at sufficiently low temperatures, such that the charging energy exceeds the thermal energy.
• The coulomb blockade prevents electrons to enter or leave the dot when the electrochemical potential of the quantum dot does not match the Fermi energy.
• Neighbouring dots experience inter-dot capacitance and crosstalk.