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arXiv quant-ph/0410094quant-ph
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单电子量子点中单光电子的捕获、存储和探测

Single photo-electron trapping, storage, and detection in a one-electron quantum dot

Deepak Sethu Rao, Thomas Szkopek, Hans Daniel Robinson, Eli Yablonovitch, Hong-Wen Jiang

摘要:

在静电清空和重新填充具有单个电子的量子点方面已经取得了相当大的进展。通常,量子点由GaAs/AlGaAs调制掺杂异质结构上的静电栅极限定。我们报道了这样一个量子点的填充由一个单一的光电子,来自一个单独的光子。在每个光子到达之前,静电点可以被清空并以受控的方式重置。被捕获的光电子由邻近静电势阱集成的点接触晶体管检测。每个存储的光电子在晶体管沟道电流中引起持续的负阶跃。这样一个可控的、良性的、单个光电子探测器可以允许在飞行的光子量子比特和存储的电子量子比特之间传输信息。

英文摘要:

There has been considerable progress in electro-statically emptying, and re-filling, quantum dots with individual electrons. Typically the quantum dot is defined by electrostatic gates on a GaAs/AlGaAs modulation doped heterostructure. We report the filling of such a quantum dot by a single photo-electron, originating from an individual photon. The electrostatic dot can be emptied and reset in a controlled fashion before the arrival of each photon. The trapped photo-electron is detected by a point contact transistor integrated adjacent to the electrostatic potential trap. Each stored photo-electron causes a persistent negative step in the transistor channel current. Such a controllable, benign, single photo-electron detector could allow for information transfer between flying photon qubits and stored electron qubits.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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