Single-Photon Transistor Using a Forster Resonance
Single-Photon Transistor Using a Forster Resonance
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DOI：
10.1103/physrevlett.113.053602
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发表时间：
2014-07-28
影响因子：
8.6
通讯作者：
Rempe, Gerhard
中科院分区：
文献类型：
--
作者：
Tiarks, Daniel;Baur, Simon;Rempe, Gerhard
全光晶体管是一种器件，其中门光脉冲以高于1的增益开关目标光脉冲的传输。增益量化了每个入射栅极光子的透射目标光子数的变化。我们研究了一个入射门光子的量子极限，并观察到增益为20。栅极脉冲以里德伯激励的形式储存在超冷气体中。随后的目标脉冲的传输被里德堡封锁抑制，并被福斯特共振增强。检测到的目标光子在单次射击中以高于0.86的保真度揭示了在门脉冲期间是否产生了里德伯激发。增益提供了将晶体管输出分配到许多晶体管输入的可能性，从而使复杂的计算任务成为可能。
An all-optical transistor is a device in which a gate light pulse switches the transmission of a target light pulse with a gain above unity. The gain quantifies the change of the transmitted target photon number per incoming gate photon. We study the quantum limit of one incoming gate photon and observe a gain of 20. The gate pulse is stored as a Rydberg excitation in an ultracold gas. The transmission of the subsequent target pulse is suppressed by Rydberg blockade, which is enhanced by a Forster resonance. The detected target photons reveal in a single shot with a fidelity above 0.86 whether a Rydberg excitation was created during the gate pulse. The gain offers the possibility to distribute the transistor output to the inputs of many transistors, thus making complex computational tasks possible.