Coherent Dynamics of Coupled Electron and Nuclear Spin Qubits in Diamond

Science ◽  
2006 ◽  
Vol 314 (5797) ◽  
pp. 281-285 ◽  
Author(s):  
L. Childress ◽  
M. V. Gurudev Dutt ◽  
J. M. Taylor ◽  
A. S. Zibrov ◽  
F. Jelezko ◽  
...  
Keyword(s):  
Nuclear Spin ◽  
Spin Qubits ◽  
Coherent Dynamics

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 Coherent control via weak measurements in P31 single-atom electron and nuclear spin qubits

2018 ◽  
Vol 98 (15) ◽  
Author(s):  
J. T. Muhonen ◽  
J. P. Dehollain ◽  
A. Laucht ◽  
S. Simmons ◽  
R. Kalra ◽  
...  
Keyword(s):  
Nuclear Spin ◽  
Coherent Control ◽  
Single Atom ◽  
Spin Qubits ◽  
Weak Measurements

Quantum control of electron and nuclear spin qubits in the solid-state

2006 ◽  
Author(s):  
M. V. Gurudev Dutt ◽  
L. Childress ◽  
E. Togan ◽  
J. M. Taylor ◽  
L. Jiang ◽  
...  
Keyword(s):  
Solid State ◽  
Nuclear Spin ◽  
Quantum Control ◽  
Spin Qubits

scholarly journals Effect of electron-nuclear spin interactions for electron-spin qubits localized in InGaAs self-assembled quantum dots

2005 ◽  
Vol 97 (4) ◽  
pp. 043706 ◽  
Author(s):  
Seungwon Lee ◽  
Paul von Allmen ◽  
Fabiano Oyafuso ◽  
Gerhard Klimeck ◽  
K. Birgitta Whaley
Keyword(s):  
Quantum Dots ◽  
Electron Spin ◽  
Nuclear Spin ◽  
Spin Qubits ◽  
Spin Interactions ◽  
Self Assembled

All-electric control of donor nuclear spin qubits in silicon

2017 ◽  
Vol 12 (10) ◽  
pp. 958-962 ◽  
Author(s):  
Anthony J. Sigillito ◽  
Alexei M. Tyryshkin ◽  
Thomas Schenkel ◽  
Andrew A. Houck ◽  
Stephen A. Lyon
Keyword(s):  
Nuclear Spin ◽  
Spin Qubits ◽  
Electric Control

scholarly journals Nuclear spin qubits in a pseudospin quantum chain

2004 ◽  
Vol 69 (6) ◽  
Author(s):  
E. Novais ◽  
A. H. Castro Neto
Keyword(s):  
Nuclear Spin ◽  
Spin Qubits ◽  
Quantum Chain
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