One method of realizing a quantum computer is to define a qubit using the spin of an electron. By using electron spin resonance (ESR), which is when one applies a dc and ac magnetic field to an electron trapped in a quantum dot, one can control the spin of the electron. The lab is in collaboration with Professor Jiun-Yun Li as well as the NTU Physics Department to fabricate and realize a qubit controlled using ESR.

Researcher: Ian Huang (黃慕召), Ting-Yi Yeh (葉庭懿), and Swin Tan (陳士允)

As the number of qubits increase, the wiring required in the dilution refrigerator also becomes extremely complex, so to solve this bottleneck, cryogenic control and readout circuits can be designed. The lab will focus on the rf and high-frequency components of the control circuits as well as the circuitry required for dispersive gate-based sensing readout techniques. These circuitries potentially include but aren't limited to up- and down-converters, low noise amplifiers, and variable gain amplifiers for cryogenic operations. In addition to rf circuitries, the lab is also researching cryogenic application of FPGAs to process the digital signals for both signal generation as well as the readout data obtained from gate-based sensing.

Researcher: Swin Tan (陳士允) and Ian Huang (黃慕召)

One area of research is to improve the cryogenic performances of PCBs for quantum applications. Our lab is researching conductor-backed coplanar waveguides on PCB as well as on-chip signal transmission lines.

Researcher: Ting-Yi Yeh (葉庭懿) and Ian Huang (黃慕召)