Journal
FOUNDATIONS OF PHYSICS
Volume 42, Issue 5, Pages 688-708Publisher
SPRINGER
DOI: 10.1007/s10701-012-9639-7
Keywords
Epistemic view; Toy theory; Stabilizer
Categories
Funding
- EPSRC
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Spekkens has introduced a toy theory (Spekkens in Phys. Rev. A 75(3):032110, 2007) in order to argue for an epistemic view of quantum states. I describe a notation for the theory (excluding certain joint measurements) which makes its similarities and differences with the quantum mechanics of stabilizer states clear. Given an application of the qubit stabilizer formalism, it is often entirely straightforward to construct an analogous application of the notation to the toy theory. This assists calculations within the toy theory, for example of the number of possible states and transformations, and enables superpositions to be defined for composite systems.
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