论文标题
在摩擦耗散环境下，超导电路中的脉搏量相互作用
Pulse-qubit interaction in a superconducting circuit under frictively dissipative environment
论文作者
论文摘要
微波脉冲普遍存在用于控制和测量超导电路上制造的量子。由于持续的环境耦合，Qubits在自由时和与微波脉冲相互作用时都会发生腐蚀。随着量子逻辑门是通过脉冲量相互作用执行的，我们从理论上研究了相互作用期间的脱碳诱导的效果，尤其是在具有线性光谱分布的耗散环境下，尤其是脉冲的变化。我们发现，由于存在环境时反转过程中Qubit的不平衡泵送和发射速率，有限宽度的可传播脉冲采用了不对称的多驼峰形状。脉冲形状在消失的耗散和强散发时脉冲序列时还原为孤子脉冲。我们从包膜的角度和繁殖脉冲的相位详细分析了环境起源。
Microwave pulses are used ubiquitously to control and measure qubits fabricated on superconducting circuits. Due to continual environmental coupling, the qubits undergo decoherence both when it is free and during its interaction with the microwave pulse. As quantum logic gates are executed through pulse-qubit interaction, we study theoretically the decoherence-induced effects during the interaction, especially the variations of the pulse, under a dissipative environment with linear spectral distribution. We find that a transmissible pulse of finite width adopts an asymmetric multi-hump shape, due to the imbalanced pumping and emitting rates of the qubit during inversion when the environment is present. The pulse shape reduces to a solitonic pulse at vanishing dissipation and a pulse train at strong dissipation. We give detailed analysis of the environmental origin from both the perspectives of envelope and phase of the propagating pulse.
