The universe was in an extraordinarily low-entropy state immediately after the big bang
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Academic literature describes the Past Hypothesis, noting that the macrostate of the universe at the moment of the Big Bang was an extremely low-entropy state.
Given a low-entropy past state, statistical mechanics purportedly explains the Second Law of Thermodynamics. Modern cosmology furnishes this account with a low-entropy early universe. However, what explains this past state? One approach simply postulates this initial condition as a contingent fact or law. Alternatively, one can seek a dynamical solution. This paper assesses the explanatory efficacy some popular proposals. In particular, Carroll's multiverse hypothesis is critiqued and shown to be subject to similar problems faced by Boltzmann.
This thesis introduces a recent analytical verification which is of significance to the philosophical debate on the direction of time in the case of electromagnetic radiation. I give an overview of a the problem of the direction of time in thermodynamics, as well as how it is solved with the Past Hypothesis, a hypothesis that the macrostate of the universe at the moment of the Big Bang was an extremely low-entropy state. I also describe the standard accepted textbook solution to the radiation problem, as well as an alternative time-symmetric theory presented by Feynman and Wheeler that had his
matter alone. The second law of thermodynamics states that the entropy of energy continually increases. At the moment of the Big Bang , it may have been
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