Spinodal decomposition and inflation: Dynamics and metric perturbations

被引:38
作者
Cormier, D [1 ]
Holman, R
机构
[1] Univ Dortmund, Inst Phys, D-44221 Dortmund, Germany
[2] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA
关键词
D O I
10.1103/PhysRevD.62.023520
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We analyze the dynamics of spinodal decomposition in inflationary cosmology using the closed time path formalism of out of equilibrium quantum field theory combined with the non-perturbative Hartree approximation. Ln addition to a general analysis. we compute the detailed evolution of two inflationary models of particular importance: lambda Phi(4) new inflation and natural inflation. We compute the metric fluctuations resulting from inflationary phase transitions in the slow roll approximation, showing that there exists a regime for which quantum fluctuations of the inflaton field result in a significant deviation in the predictions of the spectrum of primordial density perturbations from standard results. We provide case examples for which a blue tilt to the power spectrum (i.e. n(s) >1) results from the evolution of a single inflaton held, and demonstrate that field fluctuations may result in a scalar amplitude of fluctuations significantly below standard predictions, resulting in a slight alleviation of the inflationary fine-tuning problem. We show explicitly that the metric perturbation spectrum resulting from inflation depends upon the state at the outset of the inflationary phase.
引用
收藏
页码:1 / 19
页数:19
相关论文
共 76 条
[1]   PARTICLE-PRODUCTION IN THE NEW INFLATIONARY COSMOLOGY [J].
ABBOTT, LF ;
FARHI, E ;
WISE, MB .
PHYSICS LETTERS B, 1982, 117 (1-2) :29-33
[2]   Energy-momentum tensor for cosmological perturbations [J].
Abramo, LRW ;
Brandenberger, RH ;
Mukhanov, VF .
PHYSICAL REVIEW D, 1997, 56 (06) :3248-3257
[3]   COSMOLOGY FOR GRAND UNIFIED THEORIES WITH RADIATIVELY INDUCED SYMMETRY-BREAKING [J].
ALBRECHT, A ;
STEINHARDT, PJ .
PHYSICAL REVIEW LETTERS, 1982, 48 (17) :1220-1223
[4]   EFFECTS OF QUANTUM-FIELDS ON SINGULARITIES AND PARTICLE HORIZONS IN THE EARLY UNIVERSE .3. THE CONFORMALLY COUPLED MASSIVE SCALAR FIELD [J].
ANDERSON, PR .
PHYSICAL REVIEW D, 1985, 32 (06) :1302-1315
[5]   Choice of initial states in nonequilibrium dynamics [J].
Baacke, J ;
Heitmann, K ;
Patzold, C .
PHYSICAL REVIEW D, 1998, 57 (10) :6398-6405
[6]   Nonequilibrium dynamics: A renormalized computation scheme [J].
Baacke, J ;
Heitmann, K ;
Patzold, C .
PHYSICAL REVIEW D, 1997, 55 (04) :2320-2330
[7]   EXPECTATION VALUE FORMALISM IN QUANTUM FIELD THEORY .1. [J].
BAKSHI, PM ;
MAHANTHAPPA, KT .
JOURNAL OF MATHEMATICAL PHYSICS, 1963, 4 (01) :1-&
[8]  
BAKSHI PM, 1963, J MATH PHYS, V4, P12, DOI 10.1063/1.1703879
[9]   General relativistic effects in preheating [J].
Bassett, BA ;
Kaiser, DI ;
Maartens, R .
PHYSICS LETTERS B, 1999, 455 (1-4) :84-89
[10]   Four-year COBE DMR cosmic microwave background observations: Maps and basic results [J].
Bennett, CL ;
Banday, AJ ;
Gorski, KM ;
Hinshaw, G ;
Jackson, P ;
Keegstra, P ;
Kogut, A ;
Smoot, GF ;
Wilkinson, DT ;
Wright, EL .
ASTROPHYSICAL JOURNAL, 1996, 464 (01) :L1-&