TY - JOUR
T1 - Quantum sensing in the fractional Fourier domain
AU - Hegde, Swastik
AU - Durden, David J.
AU - Ajayakumar, Lakshmy Priya
AU - Sivakumar, Rishi
AU - Backlund, Mikael P.
N1 - This work was supported in part by the Arnold and Mabel Beckman Foundation (via a Beckman Young Investigator Award to M.P.B.) and by the Spectroscopy Society of Pittsburgh (via a Starter Grant Award to M.P.B). L.P.A. acknowledges additional support from the Thor R. Rubin Fellowship, the Lester E. and Kathleen A. Coleman Fellowship, and the Victor E. Buhrke Graduate Fellowship. S.H. and M.P.B. conceived of and performed the experiments. M.P.B. developed the theory. D.D. wrote control software and contributed to the building of the experimental setup. L.P.A. prepared the diamond substrate and contributed to the building of the experimental setup. R.S. contributed to early versions of the basic experiment.
PY - 2025/2
Y1 - 2025/2
N2 - Certain quantum sensing protocols rely on qubits that are initialized, coherently driven in the presence of a stimulus to be measured, then read out. The most widely employed driving sequences act locally in the frequency domain. We introduce and experimentally demonstrate a generalized set of sequences that effect a measurement in any fractional Fourier domain, i.e., along a linear trajectory of arbitrary angle through the time-frequency plane. Combined with linear frequency modulation, this scheme could help separate signal from background in nanoscale spectroscopy and other applications.
AB - Certain quantum sensing protocols rely on qubits that are initialized, coherently driven in the presence of a stimulus to be measured, then read out. The most widely employed driving sequences act locally in the frequency domain. We introduce and experimentally demonstrate a generalized set of sequences that effect a measurement in any fractional Fourier domain, i.e., along a linear trajectory of arbitrary angle through the time-frequency plane. Combined with linear frequency modulation, this scheme could help separate signal from background in nanoscale spectroscopy and other applications.
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U2 - 10.1103/PhysRevApplied.23.024035
DO - 10.1103/PhysRevApplied.23.024035
M3 - Article
AN - SCOPUS:85218352417
SN - 2331-7019
VL - 23
JO - Physical Review Applied
JF - Physical Review Applied
IS - 2
M1 - 024035
ER -