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Improved Separations between Quantum and Classical Communication Complexity of Total Functions

François Le Gall

quant-pharXiv:2609.16726

Abstract

We refine Gavinsky's framework (arXiv:2608.18784) for exponential separations between quantum and randomized communication complexity of total functions and obtain larger separations: polylogarithmic quantum communication versus Ω( n) randomized communication with two quantum messages, and versus Ω(n1-) for every fixed 0<<1 with more quantum messages.

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