The existence of Macroscopic unique states
Huaxin Lin ÁÖ»ªÐ  (East China Normal University)
14:00-15:00, March 25, 2024   Science Building A503
Abstract:
Let H be an infinite dimensional separable Hilbert space and B(H) the C*-algebra of bounded operators on H. Suppose that T1,T2,...,Tn are self-adjoint operators in B(H). We show that, if commutators [Ti,Tj] are sufficiently small in norm, then ``Approximately Macroscopically Unique" states always exist for any values in a synthetic spectrum of the n-tuple of self-adjoint operators. This is achieved under the circumstance for which the n-tuple may not be approximated by commuting ones. This answers a question proposed by David Mumford for measurements in quantum theory. If commutators are not small in norm but small modulo compact operators, then ``Approximate Macroscopic Uniqueness" states also exist.
About the speaker:
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