Russian boffins create two qubit quantum circuit

schrodingers_catRussian researchers have emerged from their labs smelling of potentially dead or alive cats after successfully testing Russia’s first superconducting, two-qubit, feedback-controlled circuit.

The research group from MIPT’s Artificial Quantum System Lab and Collective Use Centre had so far manged to develop a single qubit along with a parameter measuring circuit. Alexey Dmitriyev, a postgraduate at AQS said that in the the last six months, MIPT’s lab has done substantial and laborious work to organise the measuring process of superconducting qubits.

“MIPT currently has the necessary infrastructure and human capacity to deliver on building advanced qubit systems,” he said.

Dmitry Negrov, Deputy Head at the Collective Use Centre, added: “We now are at the stage where system parameters are close to the designed conditions. The next step is to take vital measurements, such as coherence time, and refine the qubit bonding. We aim to continue our work on these parameters in the future.”

Of course they are still a long way from actually getting a quantum PC which will run Windows or even solitaire, but they are getting there.

According to Andrey Baturin, Head of Scientific Management at MIPT, quantum technology research is one of the long-term priorities on the institute’s research agenda. “The Artificial Quantum System Lab and Collective Use Centre succeeded in obtaining unique equipment—modern lithographic machines and evaporation units for full-cycle production of qubits and, later, qubit systems; measuring equipment and ultra-low temperature cryostats that allow us to work with qubits at the milli-Kelvin temperature range. Such low temperatures are essential due to the extreme fragility of quantum states that can easily fail from interaction with the outside environment,” says Baturin.