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Accurate photon echo timing by optical freezing of exciton dephasing and rephasing in quantum dots

Physics

Accurate photon echo timing by optical freezing of exciton dephasing and rephasing in quantum dots

A. N. Kosarev, H. Rose, et al.

Discover how semiconductor quantum dots are revolutionizing ultrafast coherent qubit manipulation with exciting new methods for controlling echo emission timing. This groundbreaking research, conducted by Alexander N. Kosarev and colleagues, demonstrates innovative techniques that shift echo timing by up to 5 ps, enhancing the versatility of photon echoes.

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Playback language: English
Abstract
Semiconductor quantum dots (QDs) are promising candidates for ultrafast coherent qubit manipulation using laser pulses. In inhomogeneous QD ensembles, macroscopic optical polarization decays rapidly due to dephasing, but this is reversible in photon echoes. This paper proposes a method to control the echo emission time by introducing an additional resonant control pulse with a 2π area. The control pulse, depending on its timing, slows dephasing or rephasing, shifting the echo emission time by up to 5 ps in self-assembled (In,Ga)As QDs. This provides a versatile method for precise control of photon echo timing.
Publisher
Communications Physics
Published On
Dec 08, 2020
Authors
Alexander N. Kosarev, Hendrik Rose, Sergey V. Poltavtsev, Matthias Reichelt, Christian Schneider, Martin Kamp, Sven Höfling, Manfred Bayer, Torsten Meier, Ilya A. Akimov
Tags
semiconductor quantum dots
qubit manipulation
laser pulses
photon echoes
dephasing

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