scholarly journals Feedback control of nuclear spin bath of a single hole spin in a quantum dot

2015 ◽  
Vol 91 (3) ◽  
Author(s):  
Hongliang Pang ◽  
Zhirui Gong ◽  
Wang Yao
Keyword(s):  
Feedback Control ◽  
Quantum Dot ◽  
Nuclear Spin ◽  
Single Hole ◽  
Spin Bath

scholarly journals Measurement of Backaction from Electron Spins in a Gate-Defined GaAs Double Quantum dot Coupled to a Mesoscopic Nuclear Spin Bath

2020 ◽  
Vol 125 (4) ◽  
Author(s):  
P. Bethke ◽  
R. P. G. McNeil ◽  
J. Ritzmann ◽  
T. Botzem ◽  
A. Ludwig ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Nuclear Spin ◽  
Double Quantum ◽  
Electron Spins ◽  
Double Quantum Dot ◽  
Spin Bath

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 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 Exchange Control of Nuclear Spin Diffusion in a Double Quantum Dot

2010 ◽  
Vol 104 (23) ◽  
Author(s):  
D. J. Reilly ◽  
J. M. Taylor ◽  
J. R. Petta ◽  
C. M. Marcus ◽  
M. P. Hanson ◽  
...  
Keyword(s):  
Quantum Dot ◽  
Nuclear Spin ◽  
Spin Diffusion ◽  
Double Quantum ◽  
Double Quantum Dot ◽  
Exchange Control

scholarly journals Dynamics of a Mn spin coupled to a single hole confined in a quantum dot

2014 ◽  
Vol 90 (11) ◽  
Author(s):  
B. Varghese ◽  
H. Boukari ◽  
L. Besombes
Keyword(s):  
Quantum Dot ◽  
Single Hole

scholarly journals Enhancing the Coherence of a Spin Qubit by Operating it as a Feedback Loop That Controls its Nuclear Spin Bath

2010 ◽  
Vol 105 (21) ◽  
Author(s):  
Hendrik Bluhm ◽  
Sandra Foletti ◽  
Diana Mahalu ◽  
Vladimir Umansky ◽  
Amir Yacoby
Keyword(s):  
Nuclear Spin ◽  
Feedback Loop ◽  
Spin Bath ◽  
Spin Qubit
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