TY - JOUR
T1 - TCP, quantum gravity, the cosmological constant and all that...
AU - Banks, T.
N1 - Funding Information:
* Work supported by the Department of Energy, contract DE-AC03-76SF00515. ** Permanent address: Physics Department, Tel-Aviv University, Ramat-Aviv, Israel. * Despite the recent interest in conformally invariant theories of gravity [23] there is no real evidence that the apparent violations of the fundamental principles of quantum mechanics that appear in the perturbative solution of these theories can be circumvented.
PY - 1985/1/21
Y1 - 1985/1/21
N2 - We study cosmology from the point of view of quantum gravity. Some light is thrown on the nature of time, and it is suggested that the cosmological arrow of time is generated by a spontaneous breakdown of TCP. Conventional cosmological models in which quantum fields interact with a time-dependent gravitational field are shown to describe an approximation to the quantum gravitational wave function which is valid in the long-wavelength limit. Two problems with initial conditions are resolved in models in which a negative bare cosmological constant is cancelled by the classical excitation of a Bose field η with a very flat potential. These models can also give a natural explanation for the observed value of the cosmological constant.
AB - We study cosmology from the point of view of quantum gravity. Some light is thrown on the nature of time, and it is suggested that the cosmological arrow of time is generated by a spontaneous breakdown of TCP. Conventional cosmological models in which quantum fields interact with a time-dependent gravitational field are shown to describe an approximation to the quantum gravitational wave function which is valid in the long-wavelength limit. Two problems with initial conditions are resolved in models in which a negative bare cosmological constant is cancelled by the classical excitation of a Bose field η with a very flat potential. These models can also give a natural explanation for the observed value of the cosmological constant.
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U2 - 10.1016/0550-3213(85)90020-3
DO - 10.1016/0550-3213(85)90020-3
M3 - Article
AN - SCOPUS:0001216818
SN - 0550-3213
VL - 249
SP - 332
EP - 360
JO - Nuclear Physics, Section B
JF - Nuclear Physics, Section B
IS - 2
ER -