Comment on “Two-Photon Franson-Type Experiment and Local Realism”

Ryff, Luiz Carlos

doi:10.1103/physrevlett.86.1908

Cited by 4 publications

(5 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, their model is not a local realistic theory as defined by EPR [35]; it is local but not realistic. Models of this kind have already been criticized for being inconsistent with other experiments [36].…”

Section: Nonlocal Interferometrymentioning

confidence: 99%

Nonclassical nature of dispersion cancellation and nonlocal interferometry

Franson

2009

Phys. Rev. A

View full text Add to dashboard Cite

Several recent papers have shown that some forms of dispersion cancellation have classical analogs and that some aspects of nonlocal two-photon interferometry are consistent with local realistic models. It is noted here that the classical analogs only apply to local dispersion cancellation experiments [A.M. Steinberg et al., Phys. Rev. Lett. 68, 2421(1992] and that nonlocal dispersion cancellation [J.D. Franson, Phys. Rev. A 45, 3126 (1992)] is inconsistent with any classical field theory and has no classical analog. The local models that have been suggested for two-photon interferometry are shown to be local but not realistic if the spatial extent of the interferometers is taken into account. It is the inability of classical models to describe all of the relevant aspects of these experiments that distinguishes between quantum and classical physics, which is also the case in Bell's inequality.

show abstract

Section: Nonlocal Interferometrymentioning

confidence: 99%

Nonclassical nature of dispersion cancellation and nonlocal interferometry

Franson

2009

Phys. Rev. A

View full text Add to dashboard Cite

show abstract

“…Aerts et al Reply: In response to the Comment by Ryff [1], we underline that the model presented in [2] is not intended to provide a complete physical description of all possible phenomena that can be observed with the type of source which is used in the Franson experiment [3]; it is merely provided to show that the original formulation of the experiment cannot be used to exhibit a violation of local realism. The existence of such a local hidden-variable model removes any possibility of a violation, unless ultrafast changes are used as is shown in the latter part of our paper.…”

mentioning

confidence: 99%

Aertset al.Reply:

et al. 2001

View full text Add to dashboard Cite

“…Using path realism does have benefits, since postselection has no negative effects on the bound. The appropriate inequality has the standard bound as inequality (9) and is violated by the quantum prediction in equation (6). There is no local realist model with path realism that gives the probabilities predicted by quantum mechanics for the Franson interferometer.…”

Section: Path Realismmentioning

confidence: 99%

“…But the selection of coincident events at the two sites introduces postselection into the data analysis. This need for postselection has been under discussion for some time [3][4][5][6][7][8], and this paper is intended to review the discussion and to provide some insight into the matter at hand. We will see that, depending on what is required from the tested model class, the appropriate inequality changes so that the same experimental outcomes in some cases do violate the Bell inequality as usual, and in some cases do not.…”

Section: Introductionmentioning

confidence: 99%

Energy-time entanglement, elements of reality, and local realism

Jogenfors¹,

Larsson²

2014

J. Phys. A: Math. Theor.

View full text Add to dashboard Cite

This paper discusses energy-time entanglement experiments and their relation to Einstein-Podolsky-Rosen (EPR) elements of reality. The interferometric experiment proposed by J. D. Franson in 1989 provides the background, and the main issue here is a detailed discussion on whether a Local Realist model can give the Quantum-Mechanical predictions for this setup. The Franson interferometer gives the same interference pattern as the usual Bell experiment (modulo postselection). Even so, depending on the precise requirements made on the Local Realist model, this can imply a) no violation, b) smaller violation than usual, or c) full violation of the appropriate statistical bound. This paper discusses what requirements are necessary on the model to reach a violation, and the motivation for making these requirements. The alternatives include using a) only the measurement outcomes as EPR elements of reality, b) the emission time as EPR element of reality, and c) path realism. The subtleties of this discussion needs to be taken into account when designing and setting up future experiments of this kind, intended to test Local Realism.

show abstract

Comment on “Two-Photon Franson-Type Experiment and Local Realism”

Cited by 4 publications

References 2 publications

Nonclassical nature of dispersion cancellation and nonlocal interferometry

Nonclassical nature of dispersion cancellation and nonlocal interferometry

Aertset al.Reply:

Energy-time entanglement, elements of reality, and local realism

Contact Info

Product

Resources

About