# Time from quantum entanglement: an experimental illustration

@article{Moreva2014TimeFQ, title={Time from quantum entanglement: an experimental illustration}, author={Ekaterina Moreva and Giorgio Brida and Marco Gramegna and Vittorio Giovannetti and Lorenzo Maccone and Marco Genovese}, journal={Physical Review A}, year={2014}, volume={89}, pages={052122} }

In the last years several theoretical papers discussed if time can be an emergent property deriving from quantum correlations. Here, to provide an insight into how this phenomenon can occur, we present an experiment that illustrates Page and Wootters' mechanism of "static" time, and Gambini et al. subsequent refinements. A static, entangled state between a clock system and the rest of the universe is perceived as evolving by internal observers that test the correlations between the two…

## 114 Citations

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## References

SHOWING 1-10 OF 20 REFERENCES

Problem of time in quantum gravity

- Physics
- 2010

The Problem of Time occurs because the ‘time’ of GR and of ordinary Quantum Theory are mutually incompatible notions. This is problematic in trying to replace these two branches of physics with a…

Integrable Systems

- Mathematics
- 2012

Many natural systems can be modelled by partial differential equations (PDEs), especially systems exhibiting wave-like phenomena. Such systems often have quantities that are conserved in time, common…

Clock Time and Entropy

- History
- 1993

Testable conditional probabilities appear to be restricted to single hypersurfaces (marvelous moments) and depend only on stationary observables. Observable evolution, such as a change of entropy,…

- int

- Medicine
- 2004

The cooperation with leading scientists from all fields of research and higher education and ministers for research in Germany and the experience of giving expert advice to the federal and the state governments in Germany were very interesting experiences.

Ann

- Psychology
- 2005

Aaron Beck’s cognitive therapy model has been used repeatedly to treat depression and anxiety. The case presented here is a 34-year-old female law student with an adjustment disorder with mixed…

Phys

- Rev. D 79, 041501(R)
- 2009

Phys

- Rev. D 43, 442
- 1991

Phys

- Rev. D, 27, 2885
- 1983

Phys

- Rev. D 28, 2960-2975
- 1983