2013

First Test of High Frequency Gravity Waves from Inflation using ADVANCED LIGO

Lopez, Alejandro, Freese, Katherine

Understand

Inflation models ending in a first order phase transition produce gravitational waves (GW) via bubble collisions of the true vacuum phase.

  • We demonstrate that these bubble collisions can leave an observable signature in Advanced LIGO, an upcoming ground-based GW experiment.
  • These GW are dependent on two parameters of the inflationary model: $\varepsilon$ represents the energy difference between the false vacuum and the true vacuum of the inflaton potential, and $\chi$ measures how fast the phase transition ends ($\chi \sim$ the number of e-folds during the actual phase transition).
  • Advanced LIGO will be able to test the validity of single-phase transition models within the parameter space $10^7 \rm{GeV}\lesssim \varepsilon^{1/4} \lesssim 10^{10} \rm{GeV}$ and $0.19 \lesssim \chi \lesssim 1$.

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