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Paper 1

Universal classical-quantum superposition coding and universal classical-quantum multiple access channel coding

Masahito Hayashi, Ning Cai

Year

2020

Journal

arXiv preprint

DOI

arXiv:2011.00410

arXiv

2011.00410

We derive universal classical-quantum superposition coding and universal classical-quantum multiple access channel code by using generalized packing lemmas for the type method. Using our classical-quantum universal superposition code, we establish the capacity region of a classical-quantum compound broadcast channel with degraded message sets. Our universal classical-quantum multiple access channel codes have two types of codes. One is a code with joint decoding and the other is a code with separate decoding. The former universally achieves corner points of the capacity region and the latter universally achieves general points of the capacity region. Combining the latter universal code with the existing result by Quantum Inf Process. 18, 246 (2019), we establish a single-letterized formula for the capacity region of a classical-quantum compound multiple access channel.

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Paper 2

Topological quantum hashing with the icosahedral group.

Burrello M, Xu H, Mussardo G, Wan X.

Year

2010

Journal

Phys Rev Lett

DOI

10.1103/physrevlett.104.160502

arXiv

-

No abstract.

Open paper