Monogamy relations and upper bounds for the generalized $W$-class states using R\'{e}nyi-$\alpha$ entropy

TL;DR

This paper derives monogamy relations and upper bounds for generalized W-class states using Rényi-$\\alpha$ entropy, providing new analytical formulas and tighter bounds relevant for quantum information theory and quantum games.

Contribution

It introduces analytical formulas for R\'enyi-$\alpha$ entanglement of generalized W-class states and establishes new monogamy and polygamy relations, including tighter bounds and applications to quantum games.

Findings

Derived analytical formulas for R\'enyi-$\alpha$ entanglement of generalized W-class states.

Established monogamy and polygamy relations in terms of R\'enyi-$\alpha$ entanglement and assistance.

Provided tighter monogamy relations using concurrence and convex-roof extended negativity.

Abstract

We investigate monogamy relations and upper bounds for generalized $W$-class states related to the R\'{e}nyi-$\alpha$ entropy. First, we present an analytical formula on R\'{e}nyi-$\alpha$ entanglement (R$\alpha$E) and R\'{e}nyi-$\alpha$ entanglement of assistance (REoA) of a reduced density matrix for a generalized $W$-class states. According to the analytical formula, we show monogamy and polygamy relations for generalized $W$-class states in terms of R$\alpha$E and REoA. Then we give the upper bounds for generalized $W$-class states in terms of R$\alpha$E. Next, we provide tighter monogamy relations for generalized $W$-class states in terms of concurrence and convex-roof extended negativity and obtain the monogamy relations for R$\alpha$E by the analytical expression between R$\alpha$E and concurrence. Finally, we apply our results into quantum games and present a new bound of the nonclassicality of quantum games restricting to generalized $W$-class states.