Entropic formulation of the uncertainty principle for the number and annihilation operators

TL;DR

This paper develops entropic uncertainty relations for the number and annihilation operators using a novel approach involving common eigenfunctions and the Riesz-Thorin theorem, applicable to both continuous and discretized distributions.

Contribution

It introduces a new entropic framework for uncertainty relations involving the number and annihilation operators, including bounds based on Renyi and Tsallis entropies.

Findings

Derived bounds for entropic uncertainty relations

Established relations for continuous and discretized distributions

Applied Riesz-Thorin theorem to quantum operators

Abstract

An entropic approach to formulating uncertainty relations for the number-annihilation pair is considered. We construct some normal operator that traces the annihilation operator as well as commuting quadratures with a complete system of common eigenfunctions. Expanding the measured wave function with respect to them, one obtains a relevant probability distribution. Another distribution is naturally generated by measuring the number operator. Due to the Riesz-Thorin theorem, there exists a nontrivial inequality between corresponding functionals of the above distributions. We find the bound in this inequality and further derive uncertainty relations in terms of both the Renyi and Tsallis entropies. Entropic uncertainty relations for continuous distribution as well as relations for discretized one are presented.