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From: scerir <scerir.domain.name.hidden>

Date: Wed, 20 Jun 2001 17:43:08 +0200

Joel Dobrzelewski:

*> I know this is not a popular view, but I am not convinced of the validity of
*

*> such experiments. One proponent of the realist opinion, who has better
*

*> arguments than I, is Caroline Thompson:
*

*> http://users.aber.ac.uk/cat/
*

Yes, I know. But chances for loopholes are very narrow, after

20 years, unfortunately.

*> I admit I'm not too familiar with these concepts or terms. I'll try to read
*

*> up and understand them a little better.
*

*> In the mean time, my main objection to non-local phenomena is, once again,
*

*> our inability to formally implement it.
*

*> Challenge: write a set of non-local equations or a non-local computer
*

*> program that isn't implemented locally.
*

*> For example:
*

*> It would be easy enough to program a virtual reality simulation to exhibit
*

*> seemingly non-local behaviors. We could even do something extremely
*

*> macroscopic like joining the motion of two pool balls firmly together - so
*

*> that whenever one was moved, the other moved also - seemingly
*

*> instantaneously.
*

Very interesting. For local vs non-local experiments and effects

with (two separated) computers see:

www.maths.nottingham.ac.uk/personal/sjw/abstracts/accardi.html

http://volterra.mat.uniroma2.it/

the link "probability and quantum ...."

Have a look also to:

http://arxiv.org/abs/quant-ph/0007019

Non-locality and quantum theory: new experimental evidence

Luigi Accardi, Massimo Regoli

Starting from the late 60's many experiments have been performed

to verify the violation Bell's inequality by Einstein-Podolsky-Rosen

(EPR) type correlations. The idea of these experiments being that:

(i) Bell's inequality is a consequence of locality, hence its experimental

violation is an indication of non locality; (ii) this violation is a typical

quantum phenomenon because any classical system making local

choices (either deterministic or random) will produce correlations

satisfying this inequality. Both statements (i) and (ii) have been criticized

by quantum probability on theoretical grounds (not discussed in the present

paper) and the experiment discussed below has been devised to support

these theoretical arguments. We emphasize that the goal of our experiment

is not to reproduce classically the EPR correlations but to prove that there

exist perfectly local classical dynamical systems violating Bell's inequality.

http://arxiv.org/abs/quant-ph/0007005

Locality and Bell's inequality

Luigi Accardi, Massimo Regoli

We prove that the locality condition is irrelevant to Bell in equality.

We check that the real origin of the Bell's inequality is the assumption

of applicability of classical (Kolmogorovian) probability theory to quantum

mechanics. We describe the chameleon effect which allows to construct

an experiment realizing a local, realistic, classical, deterministic

and macroscopic violation of the Bell inequalities.

http://arxiv.org/abs/quant-ph/9606019

A Proposed Experiment Showing that Classical Fields

Can Violate Bell's Inequalities

Patrick Suppes (Stanford University, USA), J. Acacio de Barros

(Federal University at Juiz de Fora, Brazil), Adonai S.

Sant'Anna (Federal University at Parana, Brazil)

We show one can use classical fields to modify a quantum optics experiment

so that Bell's inequalities will be violated. This happens with continuous

random variables that are local, but we need to use the correlation matrix

to prove there can be no joint probability distribution of the observables.

For "joining the motion of two pool balls firmly together", etc. see

http://arxiv.org/abs/quant-ph/0007044

The Violation of Bell Inequalities in the Macroworld

Diederik Aerts, Sven Aerts, Jan Broekaert, Liane Gabora

We show that Bell inequalities can be violated in the macroscopic world.

The macroworld violation is illustrated using an example involving connected

vessels of water. We show that whether the violation of inequalities occurs in

the microworld or in the macroworld, it is the identification of nonidentical events

that plays a crucial role. Specifically, we prove that if nonidentical events are

consistently differentiated, Bell-type Pitowsky inequalities are no longer violated,

even for Bohm's example of two entangled spin 1/2 quantum particles.

We show how Bell inequalities can be violated in cognition,

specifically in the relationship between abstract concepts and specific

instances of these concepts. This supports the hypothesis that genuine quantum

structure exists in the mind. We introduce a model where the amount of

nonlocality and the degree of quantum uncertainty are parameterized,

and demonstrate that increasing nonlocality increases the degree of

violation, while increasing quantum uncertainty decreases the degree of violation.

and for Bohm-Aharonov effect and weird jamming:

http://arxiv.org/abs/quant-ph/9605004

Action and Passion at a Distance: An Essay in Honor of Professor

Abner Shimony

Sandu Popescu, Daniel Rohrlich

Quantum mechanics permits nonlocality---both nonlocal correlations

and nonlocal equations of motion---while respecting relativistic

causality. Is quantum mechanics the unique theory that reconciles

nonlocality and causality? We consider two models, going beyond

quantum mechanics, of nonlocality---``superquantum" correlations,

and nonlocal ``jamming" of correlations---and derive new results for

the jamming model. In one space dimension, jamming allows reversal

of the sequence of cause and effect; in higher dimensions, however,

effect never precedes cause.

http://arxiv.org/abs/quant-ph/9508001

Jamming non-local quantum correlations

J. Grunhaus, S. Popescu, D. Rohrlich

We present a possible scheme to tamper with non-local quantum

correlations in a way that is consistent with relativistic causality,

but goes beyond quantum mechanics. A non-local ``jamming"

mechanism, operating within a certain space-time window, would

not violate relativistic causality and would not lead to contradictory

causal loops. The results presented in this Letter do not depend

on any model of how quantum correlations arise and apply to any

jamming mechanism.

Thanks,

- Scerir

Received on Wed Jun 20 2001 - 08:48:14 PDT

Date: Wed, 20 Jun 2001 17:43:08 +0200

Joel Dobrzelewski:

Yes, I know. But chances for loopholes are very narrow, after

20 years, unfortunately.

Very interesting. For local vs non-local experiments and effects

with (two separated) computers see:

www.maths.nottingham.ac.uk/personal/sjw/abstracts/accardi.html

http://volterra.mat.uniroma2.it/

the link "probability and quantum ...."

Have a look also to:

http://arxiv.org/abs/quant-ph/0007019

Non-locality and quantum theory: new experimental evidence

Luigi Accardi, Massimo Regoli

Starting from the late 60's many experiments have been performed

to verify the violation Bell's inequality by Einstein-Podolsky-Rosen

(EPR) type correlations. The idea of these experiments being that:

(i) Bell's inequality is a consequence of locality, hence its experimental

violation is an indication of non locality; (ii) this violation is a typical

quantum phenomenon because any classical system making local

choices (either deterministic or random) will produce correlations

satisfying this inequality. Both statements (i) and (ii) have been criticized

by quantum probability on theoretical grounds (not discussed in the present

paper) and the experiment discussed below has been devised to support

these theoretical arguments. We emphasize that the goal of our experiment

is not to reproduce classically the EPR correlations but to prove that there

exist perfectly local classical dynamical systems violating Bell's inequality.

http://arxiv.org/abs/quant-ph/0007005

Locality and Bell's inequality

Luigi Accardi, Massimo Regoli

We prove that the locality condition is irrelevant to Bell in equality.

We check that the real origin of the Bell's inequality is the assumption

of applicability of classical (Kolmogorovian) probability theory to quantum

mechanics. We describe the chameleon effect which allows to construct

an experiment realizing a local, realistic, classical, deterministic

and macroscopic violation of the Bell inequalities.

http://arxiv.org/abs/quant-ph/9606019

A Proposed Experiment Showing that Classical Fields

Can Violate Bell's Inequalities

Patrick Suppes (Stanford University, USA), J. Acacio de Barros

(Federal University at Juiz de Fora, Brazil), Adonai S.

Sant'Anna (Federal University at Parana, Brazil)

We show one can use classical fields to modify a quantum optics experiment

so that Bell's inequalities will be violated. This happens with continuous

random variables that are local, but we need to use the correlation matrix

to prove there can be no joint probability distribution of the observables.

For "joining the motion of two pool balls firmly together", etc. see

http://arxiv.org/abs/quant-ph/0007044

The Violation of Bell Inequalities in the Macroworld

Diederik Aerts, Sven Aerts, Jan Broekaert, Liane Gabora

We show that Bell inequalities can be violated in the macroscopic world.

The macroworld violation is illustrated using an example involving connected

vessels of water. We show that whether the violation of inequalities occurs in

the microworld or in the macroworld, it is the identification of nonidentical events

that plays a crucial role. Specifically, we prove that if nonidentical events are

consistently differentiated, Bell-type Pitowsky inequalities are no longer violated,

even for Bohm's example of two entangled spin 1/2 quantum particles.

We show how Bell inequalities can be violated in cognition,

specifically in the relationship between abstract concepts and specific

instances of these concepts. This supports the hypothesis that genuine quantum

structure exists in the mind. We introduce a model where the amount of

nonlocality and the degree of quantum uncertainty are parameterized,

and demonstrate that increasing nonlocality increases the degree of

violation, while increasing quantum uncertainty decreases the degree of violation.

and for Bohm-Aharonov effect and weird jamming:

http://arxiv.org/abs/quant-ph/9605004

Action and Passion at a Distance: An Essay in Honor of Professor

Abner Shimony

Sandu Popescu, Daniel Rohrlich

Quantum mechanics permits nonlocality---both nonlocal correlations

and nonlocal equations of motion---while respecting relativistic

causality. Is quantum mechanics the unique theory that reconciles

nonlocality and causality? We consider two models, going beyond

quantum mechanics, of nonlocality---``superquantum" correlations,

and nonlocal ``jamming" of correlations---and derive new results for

the jamming model. In one space dimension, jamming allows reversal

of the sequence of cause and effect; in higher dimensions, however,

effect never precedes cause.

http://arxiv.org/abs/quant-ph/9508001

Jamming non-local quantum correlations

J. Grunhaus, S. Popescu, D. Rohrlich

We present a possible scheme to tamper with non-local quantum

correlations in a way that is consistent with relativistic causality,

but goes beyond quantum mechanics. A non-local ``jamming"

mechanism, operating within a certain space-time window, would

not violate relativistic causality and would not lead to contradictory

causal loops. The results presented in this Letter do not depend

on any model of how quantum correlations arise and apply to any

jamming mechanism.

Thanks,

- Scerir

Received on Wed Jun 20 2001 - 08:48:14 PDT

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