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Quantum enhanced metrology in the search for fundamental physical phenomena

by K. W. Lehnert

Submission summary

As Contributors: Konrad Lehnert
Arxiv Link: (pdf)
Date submitted: 2021-10-13 08:26
Submitted by: Lehnert, Konrad
Submitted to: SciPost Physics Lecture Notes
Academic field: Physics
  • Gravitation, Cosmology and Astroparticle Physics
  • Quantum Physics
Approaches: Theoretical, Experimental


These notes summarize lectures given at the 2019 Les Houches summer school on Quantum Information Machines. They describe and review an application of quantum metrology concepts to searches for ultralight dark matter. In particular, for ultralight dark matter that couples as a weak classical force to a laboratory harmonic oscillator, quantum squeezing benefits experiments in which the mass of the dark matter particle is unknown. This benefit is present even if the oscillatory dark matter signal is much more coherent than the harmonic oscillator that it couples to, as is the case for microwave frequency searches for dark matter axion particles.

Current status:
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Submission 2110.04912v1 on 13 October 2021

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