Can we tell whether Stochastic Gravitational Waves are really primordial?

          @misc{ scivideos_PIRSA:09050052,
            doi = {10.48660/09050052},
            url = {https://pirsa.org/09050052},
            author = {Lim, Eugene},
            keywords = {Cosmology},
            language = {en},
            title = {Can we tell whether Stochastic Gravitational Waves are really primordial?},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2009},
            month = {may},
            note = {PIRSA:09050052 see, \url{https://scivideos.org/index.php/pirsa/09050052}}
          }