scholarly journals Spin relaxation in a two-electron quantum dot

JETP Letters ◽  
2003 ◽  
Vol 77 (1) ◽  
pp. 30-33 ◽  
Author(s):  
S. Dickmann ◽  
P. Hawrylak
Keyword(s):  
Quantum Dot ◽  
Spin Relaxation ◽  
Electron Quantum

scholarly journals Zeeman Energy and Spin Relaxation in a One-Electron Quantum Dot

2003 ◽  
Vol 91 (19) ◽  
Author(s):  
R. Hanson ◽  
B. Witkamp ◽  
L. M. K. Vandersypen ◽  
L. H. Willems van Beveren ◽  
J. M. Elzerman ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Spin Relaxation ◽  
Zeeman Energy ◽  
Electron Quantum

scholarly journals Experimental Signature of Phonon-Mediated Spin Relaxation in a Two-Electron Quantum Dot

2007 ◽  
Vol 98 (12) ◽  
Author(s):  
T. Meunier ◽  
I. T. Vink ◽  
L. H. Willems van Beveren ◽  
K-J. Tielrooij ◽  
R. Hanson ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Spin Relaxation ◽  
Electron Quantum

InAs/GaAs single-electron quantum dot qubit

2001 ◽  
Vol 90 (12) ◽  
pp. 6151-6155 ◽  
Author(s):  
Shu-Shen Li ◽  
Jian-Bai Xia ◽  
Jin-Long Liu ◽  
Fu-Hua Yang ◽  
Zhi-Chuan Niu ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Single Electron ◽  
Electron Quantum

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.

scholarly journals Semiconductor few-electron quantum dot operated as a bipolar spin filter

2004 ◽  
Vol 70 (24) ◽  
Author(s):  
R. Hanson ◽  
L. M. K. Vandersypen ◽  
L. H. Willems van Beveren ◽  
J. M. Elzerman ◽  
I. T. Vink ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Spin Filter ◽  
Electron Quantum
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