Journal
PHYSICAL REVIEW A
Volume 80, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.80.062328
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Funding
- Engineering and Physical Sciences Research Council [EP/C524640/1, EP/G016828/1] Funding Source: researchfish
- EPSRC [EP/G016828/1, EP/C524640/1] Funding Source: UKRI
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We show that the usefulness of the thermal state of a specific spin-lattice model for measurement-based quantum computing exhibits a transition between two distinct phases-one in which every state is a universal resource for quantum computation, and another in which any local measurement sequence can be simulated efficiently on a classical computer. Remarkably, this transition in computational power does not coincide with any phase transition, classical, or quantum in the underlying spin-lattice model.
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