# Ontological models predictively inequivalent to quantum theory.

@article{Ghirardi2013OntologicalMP, title={Ontological models predictively inequivalent to quantum theory.}, author={Giancarlo Ghirardi and Raffaele Romano}, journal={Physical review letters}, year={2013}, volume={110 17}, pages={ 170404 } }

Recently, it has been argued that no extension of quantum theory can have improved predictive power under a strong assumption of free choice of the experimental settings and validity of quantum mechanics. Here, under a different free choice assumption, we describe a model which violates this statement for almost all states of a bipartite two-level system, in a possibly experimentally testable way. From consistency with quantum mechanics and the nonsignaling principle, we derive a bound on the…

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## References

SHOWING 1-10 OF 14 REFERENCES

Rev

- Mod. Phys. 38, 447
- 1966

"J."

- PhilosophyThe New Yale Book of Quotations
- 2021

however (for it was the literal soul of the life of the Redeemer, John xv. io), is the peculiar token of fellowship with the Redeemer. That love to God (what is meant here is not God’s love to men)…

Nature Comm

- 2, 411
- 2011

Stud

- Hist. Phil. Mod. Phys. 35, 267
- 2004

Phys

- Rev. Lett. 109, 150404
- 2012

Phys

- Rev. Lett. 108, 150402
- 2012

Phys

- Rev. Lett. 105, 250404
- 2010

Int

- J. Theor. Phys. 27, 219
- 1988

Phys

- Rev. Lett. 99, 210407
- 2007