论文标题
在量子复兴时期，在量子记忆中产生持续的连贯性以进行检索
Generating sustained coherence in a quantum memory for retrieval at the times of quantum revival
论文作者
论文摘要
我们研究在耗散环境下，在实验相关的参数范围内，在量子存储器中存储的量子信息的时间降解。所考虑的量子存储器由光学系统组成，具有额外的KERR在光学模式下的非线性和具有二次非线性的非谐机械振荡器。在wigner函数的帮助下以及根据时间的原始状态的振幅丧失而对时间降解进行监测，这是根据一致性的丧失而进行的。尽管我们的时间轨迹探讨了根据所涉及的各种参数的值的变化而探索存储的信息降低的程度，但我们建议一组参数，可以在不降级的情况下检索原始信息。我们遇到了一种高度关注的寻求情况，在这种情况下，非线性的作用微不足道，系统的行为就好像信息存储在线性介质中一样。在这种情况下，信息检索独立于连贯的复兴时间，并且可以在演变期间的任何瞬间检索。
We study the time degradation of quantum information stored in a quantum memory device under a dissipative environment in a parameter range which is experimentally relevant. The quantum memory under consideration comprises of an optomechanical system with additional Kerr non-linearity in the optical mode and an anharmonic mechanical oscillator with quadratic non-linearity. Time degradation is monitored, both in terms of loss of coherence which is analyzed with the help of Wigner functions, as well as in terms of loss of amplitude of the original state studied as a function of time. While our time trajectories explore the degree to which the stored information degrades depending upon the variation in values of various parameters involved, we suggest a set of parameters for which the original information can be retrieved without degradation. We come across a highly attention seeking situation where the role played by the non-linearity is insignificant and the system behaves as if the information is stored in a linear medium. For this case, the information retrieval is independent of the coherence revival time and can be retrieved at any instant during the time evolution.
