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arXiv · 1708.09611

Soft Quantum Control for Highly Selective Interactions among Joint Quantum Systems

J. F. Haase·Z. -Y. Wang·J. Casanova·M. B. Plenio
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Abstract

We propose a quantum control scheme aimed at interacting systems that gives rise to highly selective coupling among their near-to-resonance constituents. Our protocol implements temporal control of the interaction strength, switching it on and off again adiabatically. This soft temporal modulation significantly suppresses off-resonant contributions in the interactions. Among the applications of our method we show that it allows us to perform an efficient rotating-wave approximation in a wide parameter regime, the elimination of side peaks in quantum sensing experiments, and selective high-fidelity entanglement gates on nuclear spins with close frequencies. We apply our theory to nitrogen-vacancy centers in diamond and demonstrate the possibility for the detection of weak electron-nuclear coupling under the presence of strong perturbations.

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J. F. Haase, Z. -Y. Wang, J. Casanova, M. B. Plenio. 2018-08-03. Soft Quantum Control for Highly Selective Interactions among Joint Quantum Systems. https://doi.org/10.1103/physrevlett.121.050402

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