Electrically switchable qubit can tune between storage and
fast calculation modes

To perform calculations, quantum computers need qubits
to act as elementary building blocks that process and store
information. Now, physicists have produced a new type of qubit that
can be switched from a stable idle mode to a fast calculation mode.
The concept would also allow a large number of qubits to be
combined into a powerful quantum computer, as researchers from the
University of Basel and TU Eindhoven have reported in the journal
Nature Nanotechnology.