In this second video, Tim will continue his lecture on NV center qubits. He will elaborate on the control of multiple nuclear spin qubits, and show how these NV centers can create a quantum network.

Main takeaways

• Spin echo is a way to protect the electron spins from decoherence caused by the surrounding nuclear spins.
• The dipolar magnetic field of the electron spin gives a unique energy splitting to differently positioned nuclear spins, allowing selective control.
• The nuclear spin’s dependence on the electron spin state forms the basis for controlled quantum gates.
• Using a beam splitter, photons can be used to generate entanglement between two distant NV centers.