# Localization and the interface between quantum mechanics, quantum field theory and quantum gravity dedicated to the memory of Rob Clifton submitted to "Studies in History and Philosophy of Physics"

@inproceedings{Schroer2007LocalizationAT, title={Localization and the interface between quantum mechanics, quantum field theory and quantum gravity dedicated to the memory of Rob Clifton submitted to "Studies in History and Philosophy of Physics"}, author={Bert Schroer and Xavier Sigaud}, year={2007} }

We show that there are significant conceptual differences between QM and QFT which make it difficult to view the latter as just a relativistic extension of the principles of QM. At the root of this is a fundamental distinction between Born-localization in QM (which in the relativistic context changes its name to Newton-Wigner localization) and modular localization which is the localization underlying QFT, after one liberates it from its standard presentation in terms of field coordinates. The…

## 9 Citations

### Geometry and Localization, a metaphorically related pair

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- 2009

It is often overlooked that local quantum physics has a built in quantum localization structure which may under certain circumstances disagree with (differential, algebraic) geometric ideas. String…

### Bondi-Metzner-Sachs Symmetry, Holography on Null-surfaces and Area Proportionality of “Light-slice” Entropy

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- 2011

It is shown that certain kinds of behavior, which hitherto were expected to be characteristic for classical gravity and quantum field theory in curved spacetime, as the infinite dimensional…

### Indecomposable semiinfinite string-localized positive energy matter and "darkness"

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- 2008

In the absence of interactions indecomposable positive energy quantum matter comes in form of three families of which the massless so called ”infinite spin” family which appeared first in Wigner’s…

### String theory deconstructed

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- 2006

This essay presents a critical evaluation of the concepts of string theory and its impact on particle physics. The point of departure is a historical review of four decades of ST within the broader…

### Jorge A. Swieca’s contributions to quantum field theory in the 60s and 70s and their relevance in present research

- Physics
- 2009

Abstract.
After revisiting some high points of particle physics and QFT of the two decades from
1960 to 1980, I comment on the work by Jorge André Swieca. I explain how it fits into the
quantum field…

### Multiple classical limits in relativistic and nonrelativistic quantum mechanics

- Physics
- 2009

The existence of a classical limit describing the interacting particles in a second-quantized theory of identical particles with bosonic symmetry is proved. This limit exists in addition to the…

### A note on Infraparticles and Unparticles

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- 2008

The observed astrophysical phenomenon of dark matter has generated new interest in the problem of whether the principles underlying QFT are consistent with invisibility/inertness of energy-momentum…

### Soft-Photons and the entanglement of charged qubtis

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- 2008

In this work, I consider the effect of the unavoidable presence of soft-photons on the spin entanglement of charged qubits, arguing that the spin entanglement is not modified if we consider the…

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### Jorge A. Swieca’s contributions to quantum field theory in the 60s and 70s and their relevance in present research

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Abstract.
After revisiting some high points of particle physics and QFT of the two decades from
1960 to 1980, I comment on the work by Jorge André Swieca. I explain how it fits into the
quantum field…