PIRSA:18060007

Dicke’s Superradiance -- From millisecond fast radio bursts (FRBs) to multiyear maser bursts

APA

Rajabi, F. (2018). Dicke’s Superradiance -- From millisecond fast radio bursts (FRBs) to multiyear maser bursts. Perimeter Institute. https://pirsa.org/18060007

MLA

Rajabi, Fereshteh. Dicke’s Superradiance -- From millisecond fast radio bursts (FRBs) to multiyear maser bursts. Perimeter Institute, Jun. 26, 2018, https://pirsa.org/18060007

BibTex

          @misc{ pirsa_18060007,
            doi = {},
            url = {https://pirsa.org/18060007},
            author = {Rajabi, Fereshteh},
            keywords = {Cosmology},
            language = {en},
            title = {Dicke{\textquoteright}s Superradiance -- From millisecond fast radio bursts (FRBs) to multiyear maser bursts},
            publisher = {Perimeter Institute},
            year = {2018},
            month = {jun},
            note = {PIRSA:18060007 see, \url{https://pirsa.org}}
          }
          

Abstract

Burst phenomena are ubiquitous in astrophysics. Understanding the origin of bright and rapid bursts, like FRBs, is an important goal of contemporary astrophysics.  We apply Dicke's superradiance, a coherent quantum mechanical radiation mechanism, to explain these burst phenomena. We show that bursts lasting from a few milliseconds (FRBs) to a few years (e.g. OH masers) can be produced by very large groups of entangled atoms/molecules. This is in contrast with the common assumption that, in the interstellar medium, the atoms/molecules in a radiating gas act independently from each other. Superradiance, a well-known and intensely studied phenomenon in the physics community, was first discussed by R. H. Dicke in 1954. I will present our superradiance models developed to explain some maser flares and FRBs, and discuss our results for the 6.7-GHz methanol, 1612-MHz OH, and 22-GHz water spectral lines. Our analyses suggest that the aforementioned groups of entangled atoms/molecules, developing over distances of up to a few kilometers for maser flares and 1000 AU for FRBs, can reproduce the observed light curves