Ontological models predictively inequivalent to quantum theory.

  title={Ontological models predictively inequivalent to quantum theory.},
  author={Giancarlo Ghirardi and Raffaele Romano},
  journal={Physical review letters},
  volume={110 17},
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… 

Figures from this paper

Ontological Models in Quantum Mechanics: What do they tell us?
The consequences of the theorems about ontological models are studied. "Maximally $\psi$-epistemic" is shown to be equivalent to the conjunction of two other conditions, each of which can be realized
On the completeness of quantum mechanics and the interpretation of the state vector
Recently, it has been argued that quantum mechanics is complete, and that quantum states vectors are necessarily in one-to-one correspondence with the elements of reality, under the assumptions that
Symmetry as a foundational concept in Quantum Mechanics
Symmetries are widely used in modeling quantum systems but they do not contribute in postulates of quantum mechanics. Here we argue that logical, mathematical, and observational evidence require that
Is a description deeper than the quantum one possible?
This work describes how the recently introduced class of crypto-nonlocal hidden variables theories can be used to characterize the maximal possible departure from quantum mechanics, when the system consists of a pair of qubits.
Quantum theory and determinism
Historically, appearance of the quantum theory led to a prevailing view that Nature is indeterministic. The arguments for the indeterminism and proposals for indeterministic and deterministic
Three-spin systems and the Pusey–Barrett–Rudolph theorem
The fundamental nature of quantum wave function has been the topic of many discussions since the beginning of the quantum theory. It either corresponds to an element of reality $(\Psi-ontic)$ or it
Quantum mechanics: completely unhidden?A critical review of the work of Colbeck and Renner
In this thesis a recent claim by Roger Colbeck and Renato Renner is reviewed [18]. This claim concerns the completeness of quantum mechanics. Colbeck and Renner state that no theory can be
The Algebra of the Pseudo-Observables I: Why Quantum Mechanics is the ultimate description of Reality
This paper is the first of several parts introducing a new powerful algebra: the algebra of the pseudo-observables. This is a C*-algebra whose set is formed by formal expressions involving
Report : No extension of quantum theory can have improved predictive power by
In [EPR35] authors postulated that uncertainty in quantum mechanics originates from our incomplete understanding of the laws of
Nonlocal Quantum Information Transfer Without Superluminal Signalling and Communication
It is reported that effective, instead of axiomatic, non-signalling is entirely sufficient for prohibiting nonlocal communication and effectively denies superluminal signalling and communication.


  • Mod. Phys. 38, 447
  • 1966
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)
  • C. Ross
  • Medicine
    The Dental register
  • 1869
Nature Comm
  • 2, 411
  • 2011
  • Hist. Phil. Mod. Phys. 35, 267
  • 2004
  • Rev. Lett. 109, 150404
  • 2012
  • Rev. Lett. 108, 150402
  • 2012
  • Rev. Lett. 105, 250404
  • 2010
  • J. Theor. Phys. 27, 219
  • 1988
  • Rev. Lett. 99, 210407
  • 2007