2017/05/31 by Brian B. Zhou, Paul C. Jerger, V. O. Shkolnikov +3 · 2 citations
Physics and Astronomy · #quant-ph #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevlett.119.140503
published as Phys. Rev. Lett. 119, 140503 (2017) · Minor revisions to main text (6 pages); added supplementary material (7 pages)
arxiv created 2017/10/02 · arxiv updated 2017/10/04
Although geometric phases in quantum evolution were historically overlooked, their active control now stimulates strategies for constructing robust quantum technologies. Here, we demonstrate arbitrary single-qubit holonomic gates from a single cycle of non-adiabatic evolution, eliminating the need to concatenate two separate cycles. Our method varies the amplitude, phase, and detuning of a two-tone optical field to control the non-Abelian geometric phase acquired by a nitrogen-vacancy center in diamond over a coherent excitation cycle. We demonstrate the enhanced robustness of detuned gates to excited-state decoherence and provide insights for optimizing fast holonomic control in dissipative quantum systems.