The authors develop a noncommutative random restriction technique to prove quantum versions of the Eldan-Gross, Talagrand isoperimetric, and KKL-type inequalities for the matrix algebra M_{2^n}.
Geometric influences on quantum Boolean cubes
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abstract
In this work, we study three problems related to the $L_1$-influence on quantum Boolean cubes. In the first place, we obtain a dimension free bound for $L_1$-influence, which implies the quantum $L^1$-KKL Theorem result obtained by Rouze, Wirth and Zhang. Beyond that, we also obtain a high order quantum Talagrand inequality and quantum $L^1$-KKL theorem. Lastly, we prove a quantitative relation between the noise stability and $L^1$-influence. To this end, our technique involves the random restrictions method as well as semigroup theory.
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Quantum KKL-type Inequalities Revisited
The authors develop a noncommutative random restriction technique to prove quantum versions of the Eldan-Gross, Talagrand isoperimetric, and KKL-type inequalities for the matrix algebra M_{2^n}.