Centre for Quantum Computation and Communication Technology, RSPE, Australian National University, Canberra, ACT 0200, Australia.
Phys Rev Lett. 2012 Aug 31;109(9):093603. doi: 10.1103/PhysRevLett.109.093603. Epub 2012 Aug 29.
In this paper we report the first demonstration of "rephased amplified spontaneous emission" (RASE) with photon-counting detection. This protocol provides an all-in-one photon-pair source and quantum-memory that has applications as a quantum repeater node. The RASE protocol is temporally multimode, and in this demonstration the photon echo was generated in a way that is spatially multimode and includes intermediate storage between two potentially long-lived spin states. A correlation between spontaneous emission and its photon echo was observed, using an ensemble of Pr(3+) ions doped into a Y2SiO5 crystal. Alterations that would allow for the measurement of nonclassical correlations are identified. These should generally apply for future experiments in rare-earth ion crystals, which are promising systems for implementing highly-multiplexed quantum repeater operations.
在本文中，我们首次展示了具有光子计数检测的“相重放大自发发射”（RASE）。该协议提供了一种一体式的光子对源和量子存储器，可作为量子中继器节点的应用。RASE 协议在时间上是多模的，在本次演示中，通过一种方式产生了光子回波，该方式在空间上是多模的，并包括两个潜在的长寿命自旋态之间的中间存储。通过在 Y2SiO5 晶体中掺杂 Pr(3+)离子的集合体，观察到自发发射与其光子回波之间的相关性。确定了允许测量非经典相关性的改变。这些改变通常适用于稀土离子晶体的未来实验，这些晶体是实现高度多路复用量子中继器操作的有前途的系统。
