Speaker
Description
Motivated by the current technology of solid-state qubits, which is one of the promising platforms for quantum computing, we are interested in the effects of random charge noises and how they can result in qubit decoherence. In this work, we model the charge noise as a random telegraph process (RTP), or a noise described by a two-state fluctuator, and analyze theoretical formulas for the RTP. We then construct a setup of a logical qubit with a qubit probe to measure the charge noise. Given the theoretical model, we investigate possible experimental parameters from the current experiments in the literature and numerically simulate the logical-qubit phase and its decoherence. Moreover, we analyze the recent phase-correction technique using Bayesian maps and show how the decoherence can be vastly improved.
NK acknowledges the support from the Development and Promotion of Science and Technology Talents Project (DPST). This work was supported by National Research Council of Thailand (NRCT) grant and N41A640120 and Australia-US-MURI grant AUS-MURI000002.
