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arXiv 2302.13484cond-mat.mes-hallquant-ph
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激子量子发射体中的可调谐声子耦合

Tunable phononic coupling in excitonic quantum emitters

Adina Ripin, Ruoming Peng, Xiaowei Zhang, Srivatsa Chakravarthi, Minhao He, Xiaodong Xu, Kai-Mei Fu, Ting Cao, Mo Li

摘要:

设计基本量子激发之间的耦合是量子科学和技术的核心。一个重要的例子是量子光源的产生,其中单光子和声子之间的耦合可以被控制和利用,以实现量子信息转换。在这里,我们报告的确定性创建的量子发射器具有高度可调的激子和声子之间的耦合。量子发射体形成在均双层半导体WSe 2中产生的应变诱导量子点中。量子限制层间激子和太赫兹层间呼吸模式声子的共定域,直接调制激子能量,导致一个独特的强声子耦合到单光子发射。层间激子发射的单光子谱具有>83%的单光子纯度和多个声子副本,每个声子副本预示着量子发射体中声子Fock态的创建。由于层间激子的垂直偶极矩,声子-光子相互作用在很宽的范围内是电可调的,有望达到强耦合区。我们的研究结果表明,在原子界面处的一种新型的固态量子激子-光机系统,发射飞行的光子量子比特与固定的声子耦合,这可以用于量子转换和互连。

英文摘要:

Engineering the coupling between fundamental quantum excitations is at the heart of quantum science and technologies. A significant case is the creation of quantum light sources in which coupling between single photons and phonons can be controlled and harnessed to enable quantum information transduction. Here, we report the deterministic creation of quantum emitters featuring highly tunable coupling between excitons and phonons. The quantum emitters are formed in strain-induced quantum dots created in homobilayer semiconductor WSe2. The colocalization of quantum confined interlayer excitons and THz interlayer breathing mode phonons, which directly modulate the exciton energy, leads to a uniquely strong phonon coupling to single-photon emission. The single-photon spectrum of interlayer exciton emission features a single-photon purity >83% and multiple phonon replicas, each heralding the creation of a phonon Fock state in the quantum emitter. Owing to the vertical dipole moment of the interlayer exciton, the phonon-photon interaction is electrically tunable in a wide range, promising to reach the strong coupling regime. Our result demonstrates a new type of solid-state quantum excitonic-optomechanical system at the atomic interface that emits flying photonic qubits coupled with stationary phonons, which could be exploited for quantum transduction and interconnection.

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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