论文标题
通过压缩感测来有效测量时间依赖性腔场
Efficient measurement of the time-dependent cavity field through compressed sensing
论文作者
论文摘要
我们提出了一种基于压缩传感（CS）的方法，以测量驱动腔量子电动力学系统状态的演化过程。在精确地重建相干的腔场幅度时，我们必须重复准备相同的状态，并且考虑测量的量子性质和Nyquist-Shannon采样定理，每次使用短采样间隔进行一次测量。但是，借助CS，可以将测量数量呈指数减少而不会丧失恢复精度。我们在很大程度上使用的原子不张开，并控制其与腔场的相互作用，以根据传感矩阵中编码的方案调节相干状态幅度。仿真结果表明，即使在存在噪声的情况下，CS方法也有效地恢复了相干腔场的幅度。
We propose a method based on compressed sensing (CS) to measure the evolution processes of the states of a driven cavity quantum electrodynamics system. In precisely reconstructing the coherent cavity field amplitudes, we have to prepare the same states repetitively and each time perform one measurement with short sampling intervals considering the quantum nature of measurement and the Nyquist-Shannon sampling theorem. However, with the help of CS, the number of measurements can be exponentially reduced without loss of the recovery accuracy. We use largely detuned atoms and control their interactions with the cavity field to modulate coherent state amplitudes according to the scheme encoded in the sensing matrix. The simulation results show that the CS method efficiently recovers the amplitudes of the coherent cavity field even in the presence of noise.
