Histories and Consistency
نویسنده
چکیده
⋆ When probability theory is applied to a sequence of events in time, the sample space consists of what we shall call histories. For example, if a coin is tossed twice in a row, the four histories HH, HT , TH, and TT , where HT stands for “heads on the first toss and tails on the second,” represent mutually exclusive possibilities, one and only one of which will occur in a single experimental run. The event algebra contains 16 “events,” including “heads on the first toss,” “the same both times,” and the like. • The sample space of histories for N tosses of one coin is identical to the sample space of outcomes when N coins are tossed at the same time. The same analogy works for quantum systems.
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