کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1161052 1490445 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Why be normal?
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
Why be normal?
چکیده انگلیسی

Suppose we have an algebra AA of quantum observables. What virtues must a function ω:A→Cω:A→C exhibit in order to qualify as a quantum state? One virtue familiar from density operator states is countable additivity  : a density operator ρρ on HH determines a countably additive probability distribution over H'sH's closed subspaces; such a probability distribution corresponds to what's known as a normal state on the von Neumann algebra B(H)B(H) of bounded operators on the Hilbert space. This essay investigates the virtue of normality, by presenting a number of physical situations and/or interpretive impulses that might tempt one to acknowledge states that are not normal, and by adducing reasons to resist these temptations.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Studies in History and Philosophy of Science Part B: Studies in History and Philosophy of Modern Physics - Volume 42, Issue 2, May 2011, Pages 107–115
نویسندگان
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