抑制各向异性胶体量子点激子细结构分裂在量子通信中的应用。

IF 4.6 2区化学 Q2 CHEMISTRY, PHYSICAL

The Journal of Physical Chemistry Letters Pub Date : 2025-10-01 DOI:10.1021/acs.jpclett.5c02582

Serguei V Goupalov

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引用次数: 0

摘要

量子中继器的实现需要不可区分和纠缠光子对的按需源。这些器件可以基于单个半导体量子点（QD），用于通过双激子-激子发射级联产生偏振纠缠光子对。其实现的关键因素是能够找到激子辐射重态几乎为零的精细结构分裂（FSS）量子点。本文分析了在胶体纳米晶体中抑制FSS的条件，并证明了其可行性。这将开启在量子通信中使用低成本胶体量子点的可能性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Suppression of Exciton Fine-Structure Splitting in Anisotropic Colloidal Quantum Dots for Applications in Quantum Communications.

On-demand sources of indistinguishable and entangled photon pairs are needed for implementations of quantum repeaters. These devices can be based on a single semiconductor quantum dot (QD) employed for the generation of polarization-entangled photon pairs via a biexciton-exciton emission cascade. The key factor enabling its realization is the ability to find QDs with almost zero fine-structure splitting (FSS) of the exciton radiative doublet. Here we analyze conditions where FSS suppression can occur in colloidal nanocrystals and demonstrate its feasibility. This would open the possibility to use low-cost colloidal QDs in quantum communications.

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来源期刊

The Journal of Physical Chemistry Letters CHEMISTRY, PHYSICAL-NANOSCIENCE & NANOTECHNOLOGY

CiteScore

9.60

自引率

7.00%

发文量

1519

审稿时长

1.6 months

期刊介绍： The Journal of Physical Chemistry (JPC) Letters is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, chemical physicists, physicists, material scientists, and engineers. An important criterion for acceptance is that the paper reports a significant scientific advance and/or physical insight such that rapid publication is essential. Two issues of JPC Letters are published each month.