[PAST EVENT] Physics Colloquium - Yue (Joyce) Jiang

September 29, 2023
4pm - 5pm
Small Hall, Room 111
300 Ukrop Way
Williamsburg, VA 23185Map this location
Access & Features
  • Open to the public

Yue (Joyce) Jiang, JILA, University of Colorado Boulder, Title of Talk: Quantum-enhanced sensing for axion dark matter

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.