There are many obstacles that must be overcome before quantum computers become commonplace. However, UNSW in Sydney. A new technology for controlling millions of spin qubits takes that step one step further.
The latest research from the team has been published in Science Advances. It claims to have solved one of the major obstacles to large-scale quantum computing. The problem is that you can control millions of cubits without occupying a lot of space.
Dr. Jarryd Pla, a quantum engineer in the Faculty of Electrical Engineering and Communications, said: Recent Videos Regarding development, “quantum computers have promised to revolutionize a wide range of areas that are essential to our daily lives, but current generation quantum computers are major with only a handful of qubits. It’s a device proof. “
He continued. “… At the bottom of my heart, there has always been this persistent question of how to move from controlling just a few cubits we can now to controlling millions of qubits. Will be needed to maximize the potential of. “
Traditional quantum computers rely on a microwave magnetic field through the current through the control wire next to the qubit. The problem is that the qubit can only be controlled near the wire, as the control magnetic field drops rapidly with distance. To control more qubits, the computer needs more wires, which occupy valuable space and generate a lot of heat. For quantum computers that require cryogenic temperatures of about -270 ° C to operate, additional heat generation causes major problems.
Mr. Pula said: “In the new result, we have come up with a new way to remove the control line and provide a field that can cover the entire quantum chip. Place a small crystal on the device and excite it with low power. Microwave. The crystal resonates. It can generate a uniform magnetic field over the entire region on the chip and reach millions of cubics. Because this magnetic field is uniform, all the cubics rotate at the same speed. This is reliable. Is essential for improving and avoiding errors.
The crystal in question is called a dielectric resonator. The resonator reduces the wavelength of the microwave to less than a millimeter and efficiently converts the microwave power into a magnetic field that controls the spin of the qubit.
In particular, the new method does not require large amounts of power due to the magnetic field and reduces heat generation.
“I’m really excited because the potential of this new technology was a piece of a puzzle,” said Professor Andrew Zurack, a professor of quantum engineering science who is a colleague at Dr. Pula’s university. To ensure that we produce the millions of cubits we will need in the future, but this now shows how to control those cubits. “
Dr. Jarryd Pla continues: For real It can affect your life. This result takes us one step closer to realizing all this potential.
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