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[PAST EVENT] Physics Colloquium - Yue (Joyce) Jiang
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Yue (Joyce) Jiang, JILA, University of Colorado Boulder, Title of Talk: Quantum-enhanced sensing for axion dark matter
Abstract:
Quantum-enhanced sensors hold promise for accelerating the search for weak signals arising from fundamental physics beyond the Standard Model. For example, a recent experiment used squeezed vacuum noise to double the quantum-limited search rate for the axion, a hypothetical dark matter particle. However, further enhancement of the search rate is inhibited by the fragility of the squeezed state, which is susceptible to losses. In this presentation, I will discuss a more robust quantum-enhanced sensing technique using simultaneous state-swapping and two-mode squeezing interactions, enabling backaction-evading measurement. Our experiment demonstrated an 8-fold speedup for searching a synthetic axion signal compared to the detector operating at the quantum limit. Implementing this enhanced sensing technique in an axion search would enable a much faster sweep through the vast axion parameter space, circumventing quantum noise limit.