Combining general relativity and quantum theory: points of conflict and contact

Details Combining general relativity and quantum theory: points of conflict and contact Combining general relativity and quantum theory: points of conflict and contact

2001-10-09

arxiv.org/abs/gr-qc/0110046v1

Class.Quant.Grav. 19 (2002) 3551-3566

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Invited Talk at "The Early Universe and Cosmological Observations: a Critical Review", UCT, Cape Town, 23-25 July,2001; to app

Scientific paper

10.1088/0264-9381/19/13/312

The issues related to bringing together the principles of general relativity and quantum theory are discussed. After briefly summarising the points of conflict between the two formalisms I focus on four specific themes in which some contact has been established in the past between GR and quantum field theory: (i) The role of planck length in the microstructure of spacetime (ii) The role of quantum effects in cosmology and origin of the universe (iii) The thermodynamics of spacetimes with horizons and especially the concept of entropy related to spacetime geometry (iv) The problem of the cosmological constant.

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