摘要:

During this conference we have heard a great deal about recent progress in understanding the development of cosmic structures from small initial seed perturbations. In these concluding remarks, I would like to comment on the two parts of the picture involving elementary-particle physics: 1) the generation of the seed perturbations in the early universe during inflation, and 2) the nature of the dark matter. ©1999 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.59420

出版商:AIP    

年代:1999

数据来源: AIP

摘要:

Taking field theory seriously, inflation model-building is difficult but not impossible. The observed value of the spectral index of the adiabatic density perturbation is starting to discriminate between models, and may well pick out a unique one in the forseeable future. ©1999 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.59442

出版商:AIP    

年代:1999

数据来源: AIP

摘要:

This is a reproduction of Professor Stephen Hawking’s part in a debate, which took place at the COSMO 98 Coference, in Monterey, California. Two other physicists, Andrei Linde and Alexander Villenkin, also took part. Professor Hawking is the Lucasian Professor of Mathematics at the University of Cambridge, in England. ©1999 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.59386

出版商:AIP    

年代:1999

数据来源: AIP

摘要:

I review the tunneling, Hartle-Hawking and Linde proposals for the wave function of the universe and comment on the recent work on quantum creation of open universes. ©1999 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.59443

出版商:AIP    

年代:1999

数据来源: AIP

摘要:

I discuss the relation between various wave functions of the universe and argue that this issue becomes relatively unimportant in the context of the theory of a self-reproducing inflationary universe. ©1999 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.59409

出版商:AIP    

年代:1999

数据来源: AIP

摘要:

In a number of scalar potentials with an unstable local maximum at the origin, chaotic inflation is followed by new inflation if model parameters of the potential are appropriately chosen. We calculate the spectrum of adiabatic fluctuations in such a double inflation model and discuss its cosmological implications. ©1999 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.59419

出版商:AIP    

年代:1999

数据来源: AIP

摘要:

We propose a model of inflation based on a simple variant of the NMSSM, called&fgr;NMSSMwhere the additional singlet &fgr; plays the role of the inflation in hybrid (or inverted hybrid) type models. The&fgr;NMSSMsolves the &mgr; problem of the MSSM via the vacuum expectation value of the gauge singlet N, but also solves the strong CP problem through an approximate Peccei-Quinn symmetry. The potential energy which drives inflation originates from the F-term of the effective supergravity theory which result from a generic string theory. In the class of models considered the inflation is protected from receiving mass during inflation by a Heisenberg symmetry, avoiding the &eegr; problem. ©1999 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.59424

出版商:AIP    

年代:1999

数据来源: AIP

摘要:

We study models of inflation where the inflation corresponds to a flat direction and its mass-squared is generated by gravity mediated soft supersymmetry breaking at high scale. If the inflation has non negligible couplings to other fields, its mass runs with the scale and can reach the small value required by slow roll inflation at lower scale. Slow roll inflation can therefore take place in such a regime, but the spectral index is then scale dependent. We explore the parameter space of this kind of models to find the region compatible with the present observations. ©1999 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.59430

出版商:AIP    

年代:1999

数据来源: AIP

摘要:

A quantum field theory warm inflation model is presented that solves the cosmological horizon problem. An interpretation of the model is given from supersymmetry and superstring theory. ©1999 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.59431

出版商:AIP    

年代:1999

数据来源: AIP

摘要:

It has been shown that sub-Planckian models of inflation require initial homogeneity on super-Hubble scales under certain commonly held assumptions. Here I remark on the possible implications of this result for inflationary cosmology. ©1999 American Institute of Physics.

ISSN:0094-243X    

DOI:10.1063/1.59432

出版商:AIP    

年代:1999

数据来源: AIP