EMERGING TRENDS IN COMPUTING
QUANTUM COMPUTING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the typical arrangement of Ga and As nuclear spins in a GaAs quantum dot at 100 millikelvin?
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ferromagnetic alignment
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antiferromagnetic alignment
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helical magnetic ordering
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random, unpolarized
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Explanation:
Detailed explanation-1: -Quantum dots are formed in the conduction channel near the depletion of the 2DEG. Multiple quantum dots are formed by the disordered potential in the FET. We also measured insulator dependence of the quantum dot formation.
Detailed explanation-2: -The level spacing of a 100 nm 2D dot is 0.03 meV, which is large enough to be observable at dilution refrigerator temperatures of 100 mK = 0.0086 meV.
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