Martin I, Zurek W H
Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Phys Rev Lett. 2007 Mar 23;98(12):120401. doi: 10.1103/PhysRevLett.98.120401.
We propose a method for a weak continuous measurement of the energy eigenstates of a fast quantum system by means of a slow detector. Such a detector is sensitive only to slowly changing variables, e.g., energy, while its backaction can be limited solely to decoherence of the eigenstate superpositions. We apply this scheme to the problem of detection of quantum jumps between energy eigenstates in a harmonic oscillator.
我们提出了一种通过慢速探测器对快速量子系统的能量本征态进行弱连续测量的方法。这样的探测器仅对缓慢变化的变量（例如能量）敏感，而其反作用可以仅局限于本征态叠加的退相干。我们将此方案应用于检测谐振子中能量本征态之间的量子跃迁问题。
