# Action and Passion at a Distance

An Essay in Honor of Professor Abner Shimony

Chapter

## Introductory Abstract

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.

## Keywords

Relativistic Causality Unique Theory Quantum Correlation Light Cone Binary Condition
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## Notes and References

- 1.
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- 21.They need not be incompatible. An event in one Lorentz frame often is another event in another frame. For example, absorption of a virtual photon in one Lorentz frame corresponds to emission of a virtual photon in another. In jamming, Jim might not only send instructions, but also
*receive information*, in both cases unconsciously. (Jim is conscious only of whether or not he jams.) Suppose that the time reverse of “sending instructions” corresponds to “receiving information”. Then each observer interprets the sequence of events correctly for his Lorentz frame.Google Scholar - 22.

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© Springer Science+Business Media Dordrecht 1997