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• W2072484325 abstract "In certain circumstances, the uncertainty, ΔS[φ], of a quantum observable, S, can be bounded from below by a finite overall constant ΔS>0, i.e., ΔS[φ]≥ΔS, for all physical states φ. For example, a finite lower bound to the resolution of distances has been used to model a natural ultraviolet cutoff at the Planck or string scale. In general, the minimum uncertainty of an observable can depend on the expectation value, t=〈φ,S φ〉, through a function ΔS t of t, i.e., ΔS[φ]≥ΔS t , for all physical states φ with 〈φ,S φ〉=t. An observable whose uncertainty is finitely bounded from below is necessarily described by an operator that is merely symmetric rather than self-adjoint on the physical domain. Nevertheless, on larger domains, the operator possesses a family of self-adjoint extensions. Here, we prove results on the relationship between the spacing of the eigenvalues of these self-adjoint extensions and the function ΔS t . We also discuss potential applications in quantum and classical information theory." @default.
• W2072484325 created "2016-06-24" @default.
• W2072484325 creator A5003391249 @default.
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• W2072484325 date "2008-09-05" @default.
• W2072484325 modified "2023-10-18" @default.
• W2072484325 title "Quantum Uncertainty and the Spectra of Symmetric Operators" @default.
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• W2072484325 doi "https://doi.org/10.1007/s10440-008-9302-7" @default.
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