Journal article

Quantum Bath Control with Nuclear Spin State Selectivity via Pulse-Adjusted Dynamical Decoupling

JE Lang, DA Broadway, GAL White, LT Hall, A Stacey, LCL Hollenberg, TS Monteiro, J-P Tetienne

Physical Review Letters | American Physical Society | Published : 2019

Abstract

Dynamical decoupling (DD) is a powerful method for controlling arbitrary open quantum systems. In quantum spin control, DD generally involves a sequence of timed spin flips (π rotations) arranged to either average out or selectively enhance coupling to the environment. Experimentally, errors in the spin flips are inevitably introduced, motivating efforts to optimize error-robust DD. Here we invert this paradigm: by introducing particular control “errors” in standard DD, namely, a small constant deviation from perfect π rotations (pulse adjustments), we show we obtain protocols that retain the advantages of DD while introducing the capabilities of quantum state readout and polarization transf..

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Grants

Awarded by Australian Research Council (ARC)


Funding Acknowledgements

We acknowledge support from the Australian Research Council (ARC) through Grants No. DE170100129, No. CE170100012, and No. FL130100119. This work was performed in part at the Melbourne Centre for Nanofabrication (MCN) in the Victorian Node of the Australian National Fabrication Facility (ANFF). J. E. L. is funded by an EPSRC Doctoral Prize Fellowship. D. A. B. is supported by an Australian Government Research Training Program Scholarship.