Please use this identifier to cite or link to this item: http://hdl.handle.net/10497/17621
Title: 
Transitions in the quantum computational power
Authors: 
Issue Date: 
2014
Citation: 
Wei, T. C., Li, Y., & Kwek, L. C. (2014). Transitions in the quantum computational power. Physical Review A, 89(5), 052315.
Abstract: 
We construct two spin models on lattices (both two and three dimensional) to study the capability of quantum
computational power as a function of temperature and the system parameter. There exists a finite region in
the phase diagram such that the thermal equilibrium states are capable of providing a universal fault-tolerant
resource for measurement-based quantum computation. Moreover, in such a region the thermal resource states
on the three-dimensional lattices can enable topological protection for quantum computation. The two models
behave similarly in terms of quantum computational power. However, they have different properties in terms of
the usual phase transitions. The first model has a first-order phase transition only at zero temperature whereas
there is no transition at all in the second model. Interestingly, the transition in the quantum computational power
does not coincide with the phase transition in the first model.
URI: 
ISSN: 
1050-2947 (print)
1094-1622 (online)
Other Identifiers: 
10.1103/PhysRevA.89.052315
Website: 
Appears in Collections:Journal Articles

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