Russian scientists have created a new method for controlling quantum memory cells in superconducting quantum computers. This approach allows switching between two modes of operation, preserving information during data transfer along the chain. The new method will simplify the scaling of quantum computing systems, according to the press service of the Russian Science Foundation.
Our developed energy-efficient and compact system with "flying" qubits will accelerate the transition to the practical use of quantum technologies. It will help reduce costs and simplify the scaling of computing systems, which opens the way to compact solutions for the transmission and processing of quantum information.
As Bastrakova and other researchers emphasize, there is a serious obstacle to creating quantum computers based on superconducting circuits. The fact is that microwave superconducting resonators must be used to transmit data between elements of such systems.
Such systems are typically complex technical devices that are difficult to reduce in size. In addition, they can create cross-interference when signals from neighboring resonators overlap, which leads to distortion of the transmitted information.
Physicists argue that the problem can be solved by using qubits not only for storage but also for information transfer. To do this, you need to transfer quantum cells to the "flying" mode. In this state, a dynamic switching wave arises inside the chain of qubits, which propagates along the chain like dominoes.
Bastrakova and scientists have created a method that simplifies switching qubits in a superconducting quantum computer between "flying" and stationary modes. This approach is used to store quantum information. The researchers proposed using adiabatic quantum parametrons — devices through which current passes under the influence of an external magnetic field.
Physicists have found that these structures, which are much smaller than classical microwave resonators, can be used to switch qubits between operating modes by precisely applying an external magnetic field.
In the future, this approach may simplify the control systems of superconducting quantum computers, which will accelerate the development of complex quantum computing systems.
Earlier, Novosibirsk engineers created a compact current and voltage sensor. The device is characterized by small dimensions and unique characteristics. There are no analogues in Russia.
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