Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published November 28, 2017 | Published + Submitted
Book Section - Chapter Open

Parallel repetition via fortification: analytic view and the quantum case

Abstract

In a recent work, Moshkovitz [FOCS'14] presented a transformation n two-player games called "fortification", and gave an elementary proof of an (exponential decay) parallel repetition theorem for fortified two-player projection games. In this paper, we give an analytic reformulation of Moshkovitz's fortification framework, which was originally cast in combinatorial terms. This reformulation allows us to expand the scope of the fortification method to new settings. First, we show any game (not just projection games) can be fortified, and give a simple proof of parallel repetition for general fortified games. Then, we prove parallel repetition and fortification theorems for games with players sharing quantum entanglement, as well as games with more than two players. This gives a new gap amplification method for general games in the quantum and multiplayer settings, which has recently received much interest. An important component of our work is a variant of the fortification transformation, called "ordered fortification", that preserves the entangled value of a game. The original fortification of Moshkovitz does not in general preserve the entangled value of a game, and this was a barrier to extending the fortification framework to the quantum setting.

Additional Information

© 2017 Mohammad Bavarian, Thomas Vidick, and Henry Yuen; licensed under Creative Commons License CC-BY. Date of publication: 28.11.2017. The author was supported by NSF under CCF-0939370 and CCF-1420956. The author was supported by NSF CAREER Grant CCF-1553477, AFOSR YIP award number FA9550-16-1-0495, and the IQIM, an NSF Physics Frontiers Center (NFS Grant PHY-1125565) with support of the Gordon and Betty Moore Foundation (GBMF-12500028). The author was supported by Simons Foundation grant #360893, and National Science Foundation Grants 1122374 and 1218547.

Attached Files

Published - LIPIcs-ITCS-2017-22.pdf

Submitted - 1603.05349.pdf

Files

1603.05349.pdf
Files (1.1 MB)
Name Size Download all
md5:be6aa51be37ca75790c2fb5c2604b658
369.7 kB Preview Download
md5:1f9df05f6151ee39d861773f51cbed24
731.2 kB Preview Download

Additional details

Created:
August 19, 2023
Modified:
January 13, 2024