Coherence and Indistinguishability of Single Electrons Emitted by Independent Sources
Coherence and Indistinguishability of Single Electrons Emitted by Independent Sources
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DOI：
10.1126/science.1232572
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发表时间：
2013-03-01
期刊：
影响因子：
56.9
通讯作者：
Feve, G.
中科院分区：
文献类型：
--
作者：
Bocquillon, E.;Freulon, V.;Feve, G.
由独立的同步源按需发射相干且不可区分的电子是量子电子学的一项具有挑战性的任务，特别是在其量子信息处理应用方面。我们使用两个独立的按需电子源，在电子分束器的不同输入端触发两个单电子波包的发射。经典粒子会被分束器随机分配，然而我们观察到了由量子交换导致的两粒子干涉。两个电子以不可区分的波包发射，且在分束器上同步到达时间，如低频电流噪声所记录的那样，从不同的输出端射出。双电子干涉的演示为在量子导体中操纵相干且不可区分的单电子波包提供了可能性。
The on-demand emission of coherent and indistinguishable electrons by independent synchronized sources is a challenging task of quantum electronics, in particular regarding its application for quantum information processing. Using two independent on-demand electron sources, we triggered the emission of two single-electron wave packets at different inputs of an electronic beam splitter. Whereas classical particles would be randomly partitioned by the splitter, we observed two-particle interference resulting from quantum exchange. Both electrons, emitted in indistinguishable wave packets with synchronized arrival time on the splitter, exited in different outputs as recorded by the low-frequency current noise. The demonstration of two-electron interference provides the possibility of manipulating coherent and indistinguishable single-electron wave packets in quantum conductors.