论文标题
用于实施开放量子步行的广义量子光学方案
A Generalized Quantum Optical Scheme for Implementing Open Quantum Walks
论文作者
论文摘要
开放量子步行（OQWS）是一种新型的量子步道，完全由与外部环境的耗散相互作用驱动，并以图形上完全正面的痕量保护图制定。提出了用于实施包括环境非零温度的OQW的广义量子光学方案。在拟议的量子光学方案中，两级原子扮演着“沃克”的作用，而空腔模式的Fock状态对应于“ Walker”的晶格位点。使用小型统一旋转方法，系统的有效动力学被证明是OQW。对于所选的一组参数，与早在环境温度为零的方案相比，环境温度的升高会导致系统达到渐近分布的速度要快得多。对于这种情况，渐近分布由稳定的高斯分布给出。
Open quantum walks (OQWs) are a new type of quantum walks which are entirely driven by the dissipative interaction with external environments and are formulated as completely positive trace-preserving maps on graphs. A generalized quantum optical scheme for implementing OQWs that includes non-zero temperature of the environment is suggested. In the proposed quantum optical scheme, a two-level atom plays the role of the "walker", and the Fock states of the cavity mode correspond to the lattice sites for the "walker". Using the small unitary rotations approach the effective dynamics of the system is shown to be an OQW. For the chosen set of parameters, an increase in the temperature of the environment causes the system to reach the asymptotic distribution much faster compared to the scheme proposed earlier where the temperature of the environment is zero. For this case the asymptotic distribution is given by a steady Gaussian distribution.
