论文标题
设计的可调衰减速率和可控耗散动力
Engineered Tunable Decay Rate and Controllable Dissipative Dynamics
论文作者
论文摘要
我们通过调节辅助隧道自由度的调制，研究了两级系统（QUBIT）的转向耗散动力学，这是由量子振荡器自旋 - 波森模型描述的。我们的结果表明，可以显着抑制量子量的分解速率，并同时提高其质量因子。此外，调制的动力敏感性表现出多峰值特征，该特征表明了基础结构，并且可以在实验中进行测量。我们的发现表明，联合自由度与量子位之间的相互作用对于减少量子的耗散并扩大量子操作的相干性机制至关重要。该策略可用于抵抗量子信息处理中量子相干性的恶化。
We investigate the steering dissipative dynamics of a two-level system (qubit) by means of the modulation of an assisted tunneling degree of freedom which is described by a quantum-oscillator spin-boson model. Our results reveal that the decoherence rate of the qubit can be significantly suppressed and simultaneously its quality factor is enhanced. Moreover, the modulated dynamical susceptibility exhibits a multi-peak feature which is indicative of the underlying structure and measurable in experiment. Our findings demonstrate that the interplay between the combined degrees of freedom and the qubit is crucial for reducing the dissipation of qubit and expanding the coherent regime of quantum operation much large. The strategy might be used to fight against deterioration of quantum coherence in quantum information processing.
