Atsuya Hasegawa - Maximum Separation of Quantum Communication Complexity With and Without Shared Entanglement

Fri, 18 Jul 2025 00:00:00 +0000

Maximum Separation of Quantum Communication Complexity With and Without Shared Entanglement

This seminar, given by Atsuya Hasegawa, will happend on 18 July 2025, at 14:0. It will take place in Room Not specified.

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Abstract

We present relation problems whose input size is n such that they can be solved with no communication for entanglement-assisted quantum communication models, but require Ω(n) qubit communication for 2-way quantum communication models without prior shared entanglement. This is the maximum separation of quantum communication complexity with and without shared entanglement. To our knowledge, our result even shows the first lower bound on quantum communication complexity without shared entanglement when the upper bound of entanglement-assisted quantum communication models is zero. The problem we consider is parallel repetition of any non-local game which has a perfect quantum strategy and no perfect classical strategy, and for which a parallel repetition theorem holds with exponential decay. Based on joint work with Francois Le Gall and Augusto Modanese (arXiv:2505.16457).

Atsuya Hasegawa | LIP6 - QI Team

Atsuya Hasegawa - Maximum Separation of Quantum Communication Complexity With and Without Shared Entanglement

Maximum Separation of Quantum Communication Complexity With and Without Shared Entanglement

Abstract