Karczmarek, Joanna L.Strominger, Andrew2019-09-272004Karczmarek, Joanna L, and Andrew Strominger. 2004. “Matrix Cosmology.” Journal of High Energy Physics 2004 (4): 055–055. https://doi.org/10.1088/1126-6708/2004/04/055.1029-84791126-6708http://nrs.harvard.edu/urn-3:HUL.InstRepos:41417354Exact time-dependent solutions of c = 1 string theory are described using the free fermion formulation. One such class of solutions describes draining of the Fermi sea and has a spacetime interpretation as closed string tachyon condensation. A second class of solutions, corresponding to droplets of Fermi liquid orbiting in phase space, describes closed cosmologies which bounce through singularities.en-USJournal Article2019-09-2710.1088/1126-6708/2004/04/055