# Can an effect precede its cause? A model of a noncausal world

@article{Schmidt1978CanAE, title={Can an effect precede its cause? A model of a noncausal world}, author={Helmut Schmidt}, journal={Foundations of Physics}, year={1978}, volume={8}, pages={463-480} }

The world appears causal in the sense that the result of a measurement may depend on the past history of the observed system, but not on what the experimenter will do with the system after the measurement. This raises the question whether noncausality at a macroscopic level would necessarily lead to an “unreasonable” world. The study of a model world with axiomatically well-specified properties shows that noncausal systems can be discussed in a logically consistent manner so that noncausality… Expand

#### 14 Citations

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#### References

SHOWING 1-2 OF 2 REFERENCES

MODEL OF AN OSCILLATING COSMOS WHICH REJUVENATES DURING CONTRACTION

- Physics
- 1966

For an oscillating cosmos we assume time‐symmetric initial conditions, invariant under t→ —t and t→ T + t, where t = 0, ±T, … are the times of maximal cosmos contraction. In particular we specify the… Expand

Interaction with the Absorber as the Mechanism of Radiation

- Physics
- 1945

"We must, therefore, be prepared to find that further advance into this region will require a still more extensive renunciation of features which we are accustomed to demand of the space time mode of… Expand