激光脉冲驱动下两能级双量子比特耦合系统的动力学特性分析

摘要/Abstract

摘要： 研究驻波型激光脉冲作用下，失谐、耦合或跳跃系数足够大时，两能级双比特耦合系统中腔模与比特的跃迁，通过分析和数值计算相结合的方法，导出系统的数值解及其描述的时间演化性质。通过调整外加脉冲的频率使之分别与两个腔场发生近共振，并与非共振等条件下作对比，发现两个效应：一是外加脉冲分别与腔场发生近共振情况时，共振腔中的比特与腔模的激发概率之和近似到1，即可以做到将系统能量传递囚禁在一个腔场中。二是失谐等系数足够大时，外加脉冲对腔场的影响有所差异，例如大失谐条件下，脉冲与腔场发生近共振时，比特的激发概率与受到外加脉冲的完美控制而腔模基本不做影响。

关键词: 量子信息，激光脉冲操控，数值模拟，两能级系统，随时间演化, Quantum information, Laser pulse control, numerical modeling, a two-level system, evolution over time

Abstract: The research in under the action of wave type laser pulses, detuning, coupling or jumping coefficient is large enough, a two-level coupling modes in the system of double bits and bit transition, through the analysis and numerical calculation, the method of the combination of numerical solution of the export system and describe the time evolution of the nature.By adjusting the frequency of plus pulse respectively with two cavity near the resonance occurs, and compared with non-resonant conditions such as, found that the two effects:one is the plus pulse respectively and the cavity field near resonance happens, the cavity of the bit and the modes of excitation probability approximation to the sum of 1, that can be done, system will be imprisoned in a cavity energy transfer. Another is the mismatch of coefficient is large enough, plus pulse effect on the cavity field, for example, under the condition of large detuning, pulse and the cavity field near resonance occurs, bits of excitation probability and by the pulse with perfect control and basic modes do not do.

中图分类号:

O438

朱聿蔚邬云文彭俊李智伟. 激光脉冲驱动下两能级双量子比特耦合系统的动力学特性分析[J]. J4, 2017, 34(2): 175-183.

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