Time Saved in the Race for Controlling Quantum Dot Qubits
■Quantum technology provides the means to achieve breakthroughs in computing. The team at RIKEN’s Quantum Functional System Research Group are focused on technologies to control the quantum state to process information faster with low energy consumption. To make this happen, they focus on establishing one stable qubit then scaling it up to many. In the work of stabilizing a single qubit, noise is a common challenge.
●Detecting Small Changes:
■Researcher, Dr. Takashi Nakajima and his, team are working on ways of detecting a small charge of a single electron in a device known as a quantum dot. Existing charge sensor technologies are vulnerable to noise and need to be stabilized. Their efforts were to stabilize the charge sensor via digital proportional-integral-differential (PID)control to compensate for drift. To accomplish that, the team needed to synchronize PID control with qubit control signals. This was achieved with a Keysight Arbitrary waveform generator (AWG) that controlled the qubit device via high speed pulse signals. The processing involved needed the lowest latency possible and the team wrote their own routines in Verilog and Keysight’s FPGA software.
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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December 10, 2021 |
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3121-1328.EN |
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569 KB |
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