Dynamical-Decoupling-Based Quantum Sensing - Floquet Spectroscopy
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2015-10-30 |
| Journal | Physical Review X |
| Authors | J. E. Lang, RenāBao Liu, T. S. Monteiro |
| Institutions | University College London, Chinese University of Hong Kong |
| Citations | 55 |
Abstract
Section titled āAbstractāSensing the internal dynamics of individual nuclear spins or clusters of\nnuclear spins has recently become possible by observing the coherence decay of\na nearby electronic spin: the weak magnetic noise is amplified by a periodic,\nmulti-pulse decoupling sequence. However, it remains challenging to robustly\ninfer underlying atomic-scale structure from decoherence traces in all but the\nsimplest cases. We introduce Floquet spectroscopy as a versatile paradigm for\nanalysis of these experiments, and argue it offers a number of general\nadvantages. In particular, this technique generalises to more complex\nsituations, offering physical insight in regimes of many-body dynamics, strong\ncoupling and pulses of finite duration. As there is no requirement for resonant\ndriving, the proposed spectroscopic approach permits physical interpretation of\nstriking, but overlooked, coherence decay features in terms of the form of the\navoided crossings of the underlying quasienergy eigenspectrum. This is\nexemplified by a set of ādiamondā shaped features arising for transverse-field\nscans in the case of single-spin sensing by NV-centers in diamond. We\ninvestigate also applications for donors in silicon showing that the resulting\ntunable interaction strengths offer highly promising future sensors.\n