Speaker
Description
It is well known that cosmic rays create high energy phonon bursts in the substrate of superconducting qubit devices, which is typically made of silicon or sapphire. It is also known that the electron-phonon interaction induces spin relaxation on spin qubits in silicon quantum dots, which can affect their performance. In this work, we are preemptively investigating the effects of cosmic radiation on spin qubits in silicon, more specifically the spin relaxation induced by a phonon burst created by ionizing events. We are realistically modeling the non-equilibrium phonons created on the device and analyzing how they impact the performance of a single spin qubit. We also consider the correlated relaxation of a pair of distant spin qubits due to an ionizing event. Our results can be used to estimate the radiation dose that could be tolerated before significant recalibrations are needed.
