An original multi-resonator broadband quantum memory-interface prototype layout was presented by researchers from two universities: Kazan Federal University and Kazan Quantum Center of Kazan National Research Technical University.
This design paves the way toward a universal memory solution for quantum computers, operating on superconducting qubits.
“The scheme of multi-resonator microwave quantum memory allowed for reaching 16.3 percent of quantum efficiency at room temperature, which was significantly better than other recent results in the world for microwave quantum memory in electronic ensembles at helium temperatures,” says Professor Sergey Moiseev, Director of Kazan Quantum Center.
“We also showed that quantum efficiency of such memory can be over 99 percent at sufficiently low temperatures used in quantum computer schemes on superconducting qubits,” Professor Moiseev adds.
Quantum computers improve upon conventional devices that store data as binary digits (bits). They use quantum bits (qubits), which increase speed and performance by existing in different states simultaneously.
There has been quite a bit of quantum advancements in recent news, including Google’s 72-qubit processor and a new silicon chip that can measure quantum mechanical behavior.
According to the researchers, Russia has produced a computing system of two superconducting qubits this month. In addition, Google and Harvard University are well on their way toward assembling the first 500-qubit computer prototypes.
“The main achievements of these past years in quantum computing on superconducting qubits have not only been linked with the increase in the number of interacting qubits but also with a significant lengthening of a superconducting qubit’s lifetime—to 100 microseconds,” says Oleg Sherstyukov, co-author of the paper.
“However, it’s impossible to increase this time further because of fundamental laws of physics. In that regard, the problem of creating multi-qubit microwave quantum memory with a prolonged lifetime has become very pertinent,” Sherstyukov adds.
Read the published research, “Broadband multiresonator quantum memory-interface,” in the journal Scientific Reports to learn more.
