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Paper 1

Hybrid valence-bond states for universal quantum computation

Tzu-Chieh Wei, Poya Haghnegahdar, Robert Raussendorf

Year

2013

Journal

arXiv preprint

DOI

arXiv:1310.5100

arXiv

1310.5100

The spin-3/2 Affleck-Kennedy-Lieb-Tasaki (AKLT) valence-bond state on the hexagonal lattice was shown to be a universal resource state for measurement-based quantum computation (MBQC). Can AKLT states of higher spin magnitude support universal MBQC? We demonstrate that several hybrid 2D AKLT states involving mixture of spin-2 and other lower-spin entities, such as spin-3/2 and spin-1, are also universal for MBQC. This significantly expands universal resource states in the AKLT family. Even though frustration may be a hinderance to quantum computational universality, lattices can be modified to yield AKLT states that are universal. The family of AKLT states thus provides a versatile playground for quantum computation.

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Paper 2

Inelastic backaction due to quantum point contact charge fluctuations.

Young CE, Clerk AA.

Year

2010

Journal

Phys Rev Lett

DOI

10.1103/physrevlett.104.186803

arXiv

-

No abstract.

Open paper