Questioning the Foundations of Physics pp 191-203 | Cite as

# Against Spacetime

## Abstract

The notion of “location” physics really needs is exclusively the one of “detection at a given detector” and the time for each such detection is most primitively assessed as the readout of some specific material clock. The redundant abstraction of a macroscopic spacetime organizing all our particle detections is unproblematic and extremely useful in the classical-mechanics regime. But I here observe that in some of the contexts where quantum mechanics is most significant, such as quantum tunneling through a barrier, the spacetime abstraction proves to be cumbersome. And I argue that in quantum-gravity research we might limit our opportunities for discovery if we insist on the availability of a spacetime picture.

## References

- 1.H. Poincaré,
*Science and Hypothesis*, Chapter 12 (Walter Scott Publishing, London, 1905)Google Scholar - 2.G. Amelino-Camelia, Spacetime in special-relativistic quantum theory, in preparationGoogle Scholar
- 3.T.D. Newton, E.P. Wigner, Rev. Mod. Phys.
**21**, 400 (1949)CrossRefADSzbMATHGoogle Scholar - 4.B. Schroer, arXiv:0711.4600
- 5.R.-A. Alemañ-Berenguer, arXiv:philsci-archive.pitt.edu/4313
- 6.J.J. Halliwell, Phys. Rev.
**D64**, 04408 (2001)MathSciNetGoogle Scholar - 7.R. Gambini, R.A. Porto, Phys. Rev.
**D63**, 105014 (2001)ADSMathSciNetGoogle Scholar - 8.M. Reisenberger, C. Rovelli, Phys. Rev.
**D65**, 125016 (2002)ADSMathSciNetGoogle Scholar - 9.L. Freidel, F. Girelli, E.R. Livine, Phys. Rev.
**D75**, 105016 (2007)ADSMathSciNetGoogle Scholar - 10.L.A. MacColl, Phys. Rev.
**40**, 621 (1932)CrossRefADSGoogle Scholar - 11.E.P. Wigner, Phys. Rev.
**98**, 145 (1955)CrossRefADSzbMATHMathSciNetGoogle Scholar - 12.A.M. Steinberg, Lect. Notes Phys.
**734**, 333 (2008)CrossRefADSGoogle Scholar - 13.H.G. Winful, Phys. Rep.
**436**, 1 (2006)CrossRefADSGoogle Scholar - 14.A.M. Steinberg, P. Kwiat, R. Chiao, Phys. Rev. Lett.
**71**, 708 (1993)CrossRefADSGoogle Scholar - 15.M.D. Stenner, D.J. Gauthier, M.A. Neifeld, Nature
**425**, 695 (2003)CrossRefADSGoogle Scholar - 16.S. Carlip, Lect. Notes Phys.
**769**, 89 (2009)CrossRefADSMathSciNetGoogle Scholar - 17.G. Amelino-Camelia, L. Freidel, J. Kowalski-Glikman, L. Smolin, Phys. Rev.
**D84**, 084010 (2011). arXiv:1101.0931 - 18.G. Amelino-Camelia, L. Freidel, J. Kowalski-Glikman, L. Smolin, Gen. Relativ. Gravit.
**43**, 2547 (2011). arXiv:1106.0313 - 19.S. Majid, H. Ruegg, Phys. Lett.
**B334**, 348 (1994)CrossRefADSMathSciNetGoogle Scholar - 20.S. Majid, arXiv:hep-th/0604130
- 21.D. Oriti, arXiv:0912.2441
- 22.G. Amelino-Camelia, Nature
**408**, 661 (2000). arXiv:gr-qc/0012049 - 23.M. Henneaux, C. Teitelboim,
*Quantization of Gauge Systems*(Princeton University Press, 1992)Google Scholar