Roger Balian
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Roger Balian (b. Jan 18, 1933) is a French physicist who has worked on quantum thermodynamics and theory of measurement. Balian is a member of French Académie des sciences (Academy of Sciences). His important work includes the Balian-Low theorem.
Balian wrote the influential book From Microphysics to Macrophysics (ISBN 3-540-53266-8), which is based on a course of statistical physics he taught at the École Polytechnique.