Cosmological perturbations and short distance physics from noncommutative geometry

被引:149
作者
Lizzi, F
Mangano, G
Miele, G
Peloso, M
机构
[1] Univ Naples Federico II, Dipartimento Sci Fisiche, I-80126 Naples, Italy
[2] Ist Nazl Fis Nucl, Sez Napoli, I-80126 Naples, Italy
[3] Univ Bonn, Inst Phys, D-53115 Bonn, Germany
来源
JOURNAL OF HIGH ENERGY PHYSICS | 2002年 / 06期
关键词
non-commutative geometry; cosmology of theories beyond the SM;
D O I
10.1088/1126-6708/2002/06/049
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
We investigate the possible effects on the evolution of perturbations in the inflationary epoch due to short distance physics. We introduce a suitable non local action for the inflaton field, suggested by Noncommutative Geometry, and obtained by adopting a generalized star product on a Friedmann-Robertson-Walker background. In particular, we study how the presence of a length scale where spacetime becomes noncommutative affects the gaussianity and isotropy properties of fluctuations, and the corresponding effects on the Cosmic Microwave Background spectrum.
引用
收藏
页码:1165 / 1180
页数:16
相关论文
共 56 条
[1]  
Alexander S., HEPTH0104093
[2]  
ALEXANDER S, HEPTH0108190
[3]   Cosmic rays and TeV photons as probes of quantum properties of space-time [J].
Amelino-Camelia, G ;
Piran, T .
PHYSICS LETTERS B, 2001, 497 (3-4) :265-270
[4]  
[Anonymous], HEPTH0109162
[5]   A POSSIBLE NEW DIMENSION AT A FEW TEV [J].
ANTONIADIS, I .
PHYSICS LETTERS B, 1990, 246 (3-4) :377-384
[6]   The hierarchy problem and new dimensions at a millimeter [J].
Arkani-Hamed, N ;
Dimopoulos, S ;
Dvali, G .
PHYSICS LETTERS B, 1998, 429 (3-4) :263-272
[7]   On the unitarity problem in space/time noncommutative theories [J].
Bahns, D ;
Doplicher, S ;
Fredenhagen, K ;
Piacitelli, G .
PHYSICS LETTERS B, 2002, 533 (1-2) :178-181
[8]   GAUGE-INVARIANT COSMOLOGICAL PERTURBATIONS [J].
BARDEEN, JM .
PHYSICAL REVIEW D, 1980, 22 (08) :1882-1905
[9]   DEFORMATION THEORY AND QUANTIZATION .1. DEFORMATIONS OF SYMPLECTIC STRUCTURES [J].
BAYEN, F ;
FLATO, M ;
FRONSDAL, C ;
LICHNEROWICZ, A ;
STERNHEIMER, D .
ANNALS OF PHYSICS, 1978, 111 (01) :61-110
[10]   The robustness of inflation to changes in super-Planck-scale physics [J].
Brandenberger, RH ;
Martin, J .
MODERN PHYSICS LETTERS A, 2001, 16 (15) :999-1006