超导量子比特中微波驱动导致的准粒子生成理论
量子物理
2026-02-05 v2 介观与纳米尺度物理
超导电性
摘要
微波驱动在控制超导量子电路中发挥核心作用，使量子比特门、读出和参数化相互作用成为可能。由于驱动频率通常远小于（或等于）超导能隙的两倍，一般认为此类驱动不会扰动BCS基态。然而，充分强大的驱动可激活多光子成对破坏过程，导致准粒子（QPs）生成并造成量子比特错误。本文提出了一种用于计算由电荷或磁通耦合的微波驱动引发的多光子辅助成对破坏转换速率的理论框架。通过具体案例，表明光子辅助的QP生成可能影响新型高频非致动读出架构，以及处于强驱动下的Floquet工程化超导电路。
引用
@article{arxiv.2505.00773,
title = {Theory of quasiparticle generation by microwave drives in superconducting qubits},
author = {Shoumik Chowdhury and Max Hays and Shantanu R. Jha and Kyle Serniak and Terry P. Orlando and Jeffrey A. Grover and William D. Oliver},
journal= {arXiv preprint arXiv:2505.00773},
year = {2026}
}
备注
Updated to the final version published as an Editors' Suggestion in Physical Review Applied. Minor edits to the text and also includes a new supplementary note deriving the Josephson Hamiltonian of a superconducting qubit directly from BCS theory