Effects of noise on fidelity in spin–orbit qubit transformations
2018 ◽
Vol 32
(17)
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pp. 1840028
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Keyword(s):
We analyze nonadiabatic non-Abelian holonomic transformations of spin-qubits confined to a linear time-dependent harmonic trap with time-dependent Rashba interaction. For this system, exact results can be derived for spin-rotation angle which also enables exact treatment of white gate-noise effects. We concentrate, in particular, on the reliability of cyclic transformations quantified by fidelity defined by the probability that the qubit after one full cycle remains in the ground-state energy manifold. The formalism allows exact analysis of spin transformations that optimize final fidelity. Various examples of time-dependent fidelity probability distributions are presented and discussed.
2013 ◽
Vol 47
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pp. 270-274
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Keyword(s):
1981 ◽
Vol 42
(C6)
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pp. C6-481-C6-483
Keyword(s):
Keyword(s):
2005 ◽
Vol 19
(30)
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pp. 1793-1802
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Keyword(s):
1984 ◽
Vol 11
(7)
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pp. 347-357
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