[18p-S2_202-1~10] KS.2 Quantum Information Engineering Group

3:00 PM - 3:15 PM JST(6:00 AM - 6:15 AM UTC)

[18p-S2_202-5] Methods for evaluating tunnel coupling noise in semiconductor qubits

〇(B)Koki Azuma¹, Tatsuya Matsuda², Tetsuo Kodera², Jun Yoneda¹ (1.UTokyo, 2.Science Tokyo)

Keywords:

semiconductor quantum dot,charge noise,tunnel coupling

Noise in the tunnel coupling between dot sites of semiconductor quantum dots is thought to affect the fidelity of quantum manipulation. However, a direct measurement method of tunnel coupling noise has not yet been established because such a method needs to be capable of differentiating between different noise sources. In this study, we investigate measurement methods using a few electrons in a double quantum dot. We numerically simulate the dependence of accuracies of several candidate methods on noise intensities. We will compare in detail the feasibility of each method in the conference presentation.