论文标题
受费尔米金和骨气环境影响的拓扑量子量量限制时间
Quantum speed limit time for topological qubit influenced by fermionic and bosonic environment
论文作者
论文摘要
量子理论设定了从初始状态转换为目标状态所需的最小时间。它被称为量子速度限制时间。量子速度限制时间可用于确定封闭和开放量子系统的量子演化速率。鉴于在现实世界中，我们正在处理开放量子系统，因此对这种系统的量子限制时间的研究特别重要。在这项工作中，我们考虑了两种Majorana模式实现的拓扑量子。我们考虑拓扑量子量子受费米和骨气环境影响的情况。假定费米原子和骨气环境具有欧姆样光谱密度。对于具有不同欧姆参数的各种环境，研究了量子限制时间。可以观察到，对于欧姆参数增加的超级味环境，量子速度限制时间逐渐达到恒定值，因此进化速度达到了均匀的值。还研究了外部磁场对进化速率的影响。据观察，随着磁场幅度的增加，量子速度限制时间减少
Quantum theory sets a limit on the minimum time required to transform from an initial state to a target state. It is known as quantum speed limit time. quantum speed limit time can be used to determine the rate of quantum evolution for closed and open quantum systems. Given that in the real world we are dealing with open quantum systems, the study of quantum speed limit time for such systems has particular importance. In this work we consider the topological qubit realized by two Majorana modes. We consider the case in which the topological qubit is influenced by fermionic and bosonic environment. Fermionic and bosonic environments are assumed to have Ohmic-like spectral density. The quantum speed limit time is investigated for various environment with different Ohmic parameter. It is observed that for super-Ohmic environment with increasing Ohmic parameter the quantum speed limit time gradually reaches to a constant value and thus the speed of evolution reaches to a uniform value. The effects of external magnetic field on the evolution rate are also studied. It is observed that with increasing magnitude of magnetic field, the quantum speed limit time decreases
