Scientists from Yokohama National University in Japan have found a way to precisely control qubits without
"Microwaves are commonly used forindividual quantum control, but requires individual wiring of microwave lines,” says paper author Hideo Kosaka. “On the other hand, with the help of light it is possible to locally, but not precisely, manipulate qubits.”
Kosaka and other physicists demonstratedcontrolling qubits by manipulating electron spin using a combination of microwave manipulation and local optical shifting of the transition frequencies of atoms and molecules. This process is known as the Stark shift.
In other words, they were able to combine optical methods based on laser light with microwaves to overcome previous limitations.
The researchers also demonstrated that thiscontrol of the electron spin can, in turn, control the nuclear spin of the nitrogen atom in the nitrogen-vacancy center, as well as the interaction between the electron and nuclear spins. This is important because it allows you to precisely control the qubits without connection problems.
The field of quantum computing has potentialto perform tasks too complex for traditional computers and at high speeds. However, to begin with, the development of large-scale quantum processors and quantum memory devices is necessary. Precise control of qubits — or quantum bits, the basic building blocks of quantum computers — is critical to this process. But qubit control methods have limitations for high-density, high-precision massive wiring.
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