Universal quantum computer from a quantum magnet

Details Universal quantum computer from a quantum magnet Universal quantum computer from a quantum magnet

2010-04-12

arxiv.org/abs/1004.1907v2

Phys. Rev. A 82, 052309 (2010)

Physics

Quantum Physics

5 pages, 3 figures

Scientific paper

10.1103/PhysRevA.82.052309

We show that a local Hamiltonian of spin-3/2 particles with only two-body nearest-neighbor Affleck-Kennedy-Lieb-Tasaki and exchange-type interactions has an unique ground state, which can be used to implement universal quantum computation merely with single-spin measurements. We prove that the Hamiltonian is gapped, independent of the system size. Our result provides a further step towards utilizing systems with condensed matter-type interactions for measurement-based quantum computation.

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