Homogeneous linewidth narrowing of the charged exciton via nuclear spin screening in an InAs/GaAs quantum dot ensemble

2014 ◽  
Vol 90 (20) ◽  
Author(s):  
G. Moody ◽  
M. Feng ◽  
C. McDonald ◽  
R. P. Mirin ◽  
K. L. Silverman
Keyword(s):  
Quantum Dot ◽  
Nuclear Spin ◽  
Charged Exciton ◽  
Homogeneous Linewidth ◽  
Gaas Quantum Dot

Dynamics of the nuclear spin polarization by optically oriented electrons in a (In,Ga)As/GaAs quantum dot ensemble

2009 ◽  
Vol 80 (3) ◽  
Author(s):  
Roman V. Cherbunin ◽  
Sergey Yu. Verbin ◽  
Thomas Auer ◽  
Dmitri R. Yakovlev ◽  
Dirk Reuter ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Spin Polarization ◽  
Nuclear Spin ◽  
Nuclear Spin Polarization ◽  
Gaas Quantum Dot

scholarly journals Harnessing the GaAs quantum dot nuclear spin bath for quantum control

2010 ◽  
Vol 82 (11) ◽  
Author(s):  
Hugo Ribeiro ◽  
J. R. Petta ◽  
Guido Burkard
Keyword(s):  
Quantum Dot ◽  
Nuclear Spin ◽  
Quantum Control ◽  
Spin Bath ◽  
Gaas Quantum Dot

scholarly journals Measurements of a fast nuclear-spin dynamics in a single InAs quantum dot with positively charged exciton

2012 ◽  
Vol 98 (1) ◽  
pp. 17007 ◽  
Author(s):  
X. M. Dou ◽  
B. Q. Sun ◽  
D. S. Jiang ◽  
H. Q. Ni ◽  
Z. C. Niu
Keyword(s):  
Quantum Dot ◽  
Nuclear Spin ◽  
Spin Dynamics ◽  
Charged Exciton ◽  
Inas Quantum Dot ◽  
Positively Charged

Theoretical study of excitons in GaAs quantum dot molecules obtained by nanoholes filling

2021 ◽  
Vol 124 ◽  
pp. 105614
Author(s):  
S. Tilouche ◽  
A. Sayari ◽  
M. Omri ◽  
S. Souilem ◽  
L. Sfaxi ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Theoretical Study ◽  
Quantum Dot Molecules ◽  
Gaas Quantum Dot

scholarly journals Fundamental limits of electron and nuclear spin qubit lifetimes in an isolated self-assembled quantum dot

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
George Gillard ◽  
Ian M. Griffiths ◽  
Gautham Ragunathan ◽  
Ata Ulhaq ◽  
Callum McEwan ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Spin Relaxation ◽  
Nuclear Spin ◽  
Operating Conditions ◽  
External Control ◽  
Spin Qubits ◽  
Fundamental Limits ◽  
Trade Offs ◽  
Wide Range ◽  
Spin Qubit

AbstractCombining external control with long spin lifetime and coherence is a key challenge for solid state spin qubits. Tunnel coupling with electron Fermi reservoir provides robust charge state control in semiconductor quantum dots, but results in undesired relaxation of electron and nuclear spins through mechanisms that lack complete understanding. Here, we unravel the contributions of tunnelling-assisted and phonon-assisted spin relaxation mechanisms by systematically adjusting the tunnelling coupling in a wide range, including the limit of an isolated quantum dot. These experiments reveal fundamental limits and trade-offs of quantum dot spin dynamics: while reduced tunnelling can be used to achieve electron spin qubit lifetimes exceeding 1 s, the optical spin initialisation fidelity is reduced below 80%, limited by Auger recombination. Comprehensive understanding of electron-nuclear spin relaxation attained here provides a roadmap for design of the optimal operating conditions in quantum dot spin qubits.

Single-Period InAs–GaAs Quantum-Dot Infrared Photodetectors

2008 ◽  
Vol 20 (18) ◽  
pp. 1575-1577
Author(s):  
Shu-Ting Chou ◽  
Shih-Yen Lin ◽  
Chi-Che Tseng ◽  
Yi-Hao Chen ◽  
Cheng-Nan Chen ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Infrared Photodetectors ◽  
Single Period ◽  
Quantum Dot Infrared Photodetectors ◽  
Gaas Quantum Dot
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