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26 April 2024 |
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Current-injection quantum-entangled-pair emitter using droplet epitaxial quantum dots on GaAs(111)A | | Neul Ha
; Takaaki Mano
; Takashi Kuroda
; Yoshiki Sakuma
; Kazuaki Sakoda
; | | Date: |
20 Jun 2019 | | Abstract: | A source of single photons and quantum entangled photon pairs is a key
element in quantum information networks. Here, we demonstrate the electrically
driven generation of quantum entangled pairs using a naturally symmetric GaAs
quantum dot grown by droplet epitaxy. Coincidence histograms obtained at a
temperature of 10 K reveal the generation of quantum entangled pairs that have
a fidelity to the Bell pairs of 0.71 +- 0.015, much beyond the classical limit.
The quantum nature of the emitted pairs is conserved at temperatures of up to
~65 K, and is essentially limited by the charge carrier confinement in the
present dot system. Our study offers a guideline for the fabrication of quantum
entangled pair sources suitable for practical use. | | Source: | arXiv, 1906.8454 | | Services: | Forum | Review | PDF | Favorites | |
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