Composite pulses in NMR as non-adiabatic geometric quantum gates

Details Composite pulses in NMR as non-adiabatic geometric quantum gates Composite pulses in NMR as non-adiabatic geometric quantum gates

2009-03-13

arxiv.org/abs/0903.2295v2

Phys. Rev. A 80, 024302 (2009)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevA.80.024302

We show that some composite pulses widely employed in NMR experiments are regarded as non-adiabatic geometric quantum gates with Aharanov-Anandan phases. Thus, we reveal the presence of a fundamental issue on quantum mechanics behind the traditional technique of the composite pulses. To examine the robustness of such composite pulses against fluctuations, we present a practical noise model in a two-level system. Then, we find that the composite pulses possesses purely geometrical nature even under a specific type of fluctuations.

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