Loeb, AbrahamVisbal, Elijah Francis2013-10-092013-10-082013Visbal, Elijah Francis. 2013. Future Probes of Cosmology and the High-Redshift Universe. Doctoral dissertation, Harvard University.http://dissertations.umi.com/gsas.harvard:10823http://nrs.harvard.edu/urn-3:HUL.InstRepos:11158272This thesis is a study in theoretical cosmology with an emphasis on the high-redshift universe and promising directions for future observations. In Chapters 2 and 3, we propose intensity mapping of spectral line emission from galaxies. This is a technique to observe the cumulative emission from many galaxies without resolving individual sources. We use analytic calculations and N-body simulations to predict the observational signal for different emission lines, including those from oxygen, carbon monoxide, and carbon.en-USAstrophysicsPhysicsCosmology TheoryThesis or Dissertation2013-10-09