Uncertainty Principles on Clifford Modules

In this paper, we derive the optimal Cauchy–Schwarz inequalities on a class of Hilbert and Krein modules over a Clifford algebra, which heavily depend on the Clifford algebraic structure. The obtained inequalities further lead to very general uncertainty inequalities on these modules. Some new pheno...

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Bibliographic Details
Published in:Acta mathematica Sinica. English series 2024-10, Vol.40 (10), p.2537-2570
Main Author: Lian, Pan
Format: Article
Language:English
Subjects:
Inequalities
Mathematics
Mathematics and Statistics
Modules
Operators (mathematics)
Uncertainty principles
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Summary:In this paper, we derive the optimal Cauchy–Schwarz inequalities on a class of Hilbert and Krein modules over a Clifford algebra, which heavily depend on the Clifford algebraic structure. The obtained inequalities further lead to very general uncertainty inequalities on these modules. Some new phenomena arise, due to the non-commutative nature, the Clifford-valued inner products and the Krein geometry. Taking into account applications, special attention is given to the Dirac operator and the Howe dual pair Pin ( m ) × o s p ( 1 ∣ 2 ) . Moreover, it is surprisingly to find that the recent highly non-trivial uncertainty relation for triple observables is indeed a direct consequence of our Cauchy–Schwarz inequality. This new observation leads to refined uncertainty relations in terms of the Wigner–Yanase–Dyson skew information for mixed states and other generalizations. These show that the obtained uncertainty inequalities on Clifford modules can be considered as new uncertainty relations for multiple observables.
ISSN:1439-8516
1439-7617
DOI:10.1007/s10114-024-2251-x