Researchers from Australia have developed a device that allows you to control millions of qubits. This is one of the main problems on the way to create full-fledged processors for a quantum computer capable of fault tolerant work. The work of scientists is published in the journal Science Advances.
Scientists from the University of New South Wales decided the problem of how to control millions of qubits, without overloading the architecture of the quantum computer with additional wiring and not spending an overly much electricity and heat. Now for working with each qubit, individual emitters and microwave receivers are required, reading and changing the quantum state of the memory cell.
Australian physicists decided to extend back in the 1990s the idea of control of all qubs one for the entire processor magnetic field. To do this, they have developed a new device – the so-called three-dimensional dielectric resonator, which is a crystal from a conjunction of potassium, thallium and oxygen. It converts a microwave emission pulse directed to it into focused magnetic field fluctuations. According to the estimates of researchers, using a dielectric resonator, you can simultaneously establish control of the work of about four million cubes.