论文标题
全波的方法来计算transmon Qubit的自发排放率
Full-Wave Methodology to Compute the Spontaneous Emission Rate of a Transmon Qubit
论文作者
论文摘要
自发发射速率（SER）是任何量子位（QUBIT）的重要数字，因为它可以在量子的控制和腐烂中发挥重要作用。结果，准确表征用于实用设备的SER是量子信息处理设备设计的重要步骤。在这里，我们特别关注了Transmon Qubit的实验流行平台，这是一种超导电路Qubit。尽管重要的是了解这些量子位的SER，但通常使用近似电路模型来确定或通过在制造设备上的测量结果推断出来。为了提高设计过程中预测的准确性，最好使用全波数数值方法，在实用系统的描述中可以最少近似值。在这项工作中，我们展示了如何通过对电磁环境耦合到电磁环境的近期基于现场的描述可以完成的。我们通过计算类似于经过实验表征的文献中的设备的SER来验证我们的模型。我们通过将结果与简化的集总元素电路和传输线模型进行比较，进一步跨越了我们的结果。
The spontaneous emission rate (SER) is an important figure of merit for any quantum bit (qubit), as it can play a significant role in the control and decoherence of the qubit. As a result, accurately characterizing the SER for practical devices is an important step in the design of quantum information processing devices. Here, we specifically focus on the experimentally popular platform of a transmon qubit, which is a kind of superconducting circuit qubit. Despite the importance of understanding the SER of these qubits, it is often determined using approximate circuit models or is inferred from measurements on a fabricated device. To improve the accuracy of predictions in the design process, it is better to use full-wave numerical methods that can make a minimal number of approximations in the description of practical systems. In this work, we show how this can be done with a recently developed field-based description of transmon qubits coupled to an electromagnetic environment. We validate our model by computing the SER for devices similar to those found in the literature that have been well-characterized experimentally. We further cross-validate our results by comparing them to simplified lumped element circuit and transmission line models as appropriate.
