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Fast spin state initialization in a singly charged InAs-GaAs quantum dot by optical cooling
Quantum computation requires a continuous supply of rapidly initialized qubits for quantum error correction. Here, we demonstrate fast spin state initialization with near unity efficiency in a singly charged quantum dot by optically cooling an electron spin. The electron spin is successfully cooled...
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Published in: | Physical review letters 2007-08, Vol.99 (9), p.097401-097401, Article 097401 |
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Main Authors: | , , , , , , , , , |
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container_end_page | 097401 |
container_issue | 9 |
container_start_page | 097401 |
container_title | Physical review letters |
container_volume | 99 |
creator | Xu, Xiaodong Wu, Yanwen Sun, Bo Huang, Qiong Cheng, Jun Steel, D G Bracker, A S Gammon, D Emary, C Sham, L J |
description | Quantum computation requires a continuous supply of rapidly initialized qubits for quantum error correction. Here, we demonstrate fast spin state initialization with near unity efficiency in a singly charged quantum dot by optically cooling an electron spin. The electron spin is successfully cooled from 5 to 0.06 K at a magnetic field of 0.88 T applied in Voigt geometry. The spin cooling rate is of order 10(9) s-1, which is set by the spontaneous decay rate of the excited state. |
doi_str_mv | 10.1103/physrevlett.99.097401 |
format | article |
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title | Fast spin state initialization in a singly charged InAs-GaAs quantum dot by optical cooling |
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