Created an artificial atom that generates laser radiation

As part of the program called “Creating a new technology aimed at implementing quantum information processing systems”, conducted by Japan Science and Technology Agency, scientists received laser radiation from an “artificial atom” created by combining superconducting quantum bits with a resonator. This discovery is the world's first example of using a qubit as a photon generator.

To obtain a positive result, the scientists applied a nanoamper current to the qubit, which “forced” the resonator to emit a photon every 0.5 nanoseconds. The result: microwave laser radiation with a frequency of about 10 GHz. And laser radiation, in turn, opens up the possibility of using some properties of a superconducting qubit (the basic circuit of a quantum computer), such as using a qubit as a conductor in a resonator or for controlling circuit parameters by changing the gate potential.

The application of the created radiating system is possible in its use as a source of microwaves, which is required for creating a system for converting information presented in electronic form into microwaves. In particular, for managing qubits and reading their states. Therefore, we can speak of a new discovery not only as a contribution to the fundamental research of lasers, but also as a technology that can be applied.

via Technologynewsdaily