The quantum spacetime of c>0 2d gravity

被引:5
作者
Ambjorn, J
Anagnostopoulos, KN
Thorleifsson, G
机构
[1] Niels Bohr Inst, DK-2100 Copenhagen O, Denmark
[2] Univ Bielefeld, Fac Phys, D-33615 Bielefeld, Germany
关键词
D O I
10.1016/S0920-5632(97)00890-6
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 review recent developments in the understanding of the fractal properties of quantum spacetime of 2d gravity coupled to c > 0 conformal matter. In particular we discuss bounds put by numerical simulations using dynamical triangulations on the value of the Hausdorff dimension d(H) obtained from scaling properties of two point functions defined in terms of geodesic distance. Further insight to the fractal structure of spacetime is obtained from the study of the loop length distribution function which reveals that the 0 < c less than or equal to 1 system has similar geometric properties with pure gravity, whereas the branched polymer structure becomes clear for c greater than or equal to 5.
引用
收藏
页码:742 / 744
页数:3
相关论文
共 12 条
[1]   Quantum geometry of 2D gravity coupled to unitary matter [J].
Ambjorn, J ;
Anagnostopoulos, KN .
NUCLEAR PHYSICS B, 1997, 497 (1-2) :445-475
[2]   Geometrical interpretation of the Knizhnik-Polyakov-Zamolodchikov exponents [J].
Ambjorn, J ;
Anagnostopoulos, KN ;
Magnea, U ;
Thorleifsson, G .
PHYSICS LETTERS B, 1996, 388 (04) :713-719
[3]   ON THE FRACTAL STRUCTURE OF 2-DIMENSIONAL QUANTUM-GRAVITY [J].
AMBJORN, J ;
JURKIEWICZ, J ;
WATABIKI, Y .
NUCLEAR PHYSICS B, 1995, 454 (1-2) :313-342
[4]   SCALING IN QUANTUM-GRAVITY [J].
AMBJORN, J ;
WATABIKI, Y .
NUCLEAR PHYSICS B, 1995, 445 (01) :129-142
[5]   Quantum geometry of topological gravity [J].
Ambjorn, J ;
Anagnostopoulos, KN ;
Ichihara, T ;
Jensen, L ;
Kawamoto, N ;
Watabiki, Y ;
Yotsuji, K .
PHYSICS LETTERS B, 1997, 397 (3-4) :177-184
[6]   SCALING AND THE FRACTAL GEOMETRY OF 2-DIMENSIONAL QUANTUM-GRAVITY [J].
CATTERALL, S ;
THORLEIFSSON, G ;
BOWICK, M ;
JOHN, V .
PHYSICS LETTERS B, 1995, 354 (1-2) :58-68
[7]   2-DIMENSIONAL QUANTUM-GRAVITY IN TEMPORAL GAUGE [J].
FUKUMA, M ;
ISHIBASHI, N ;
KAWAI, H ;
NINOMIYA, M .
NUCLEAR PHYSICS B, 1994, 427 (1-2) :139-157
[8]   STRING FIELD-THEORY OF C-LESS-THAN-OR-EQUAL-TO-1 NONCRITICAL STRINGS [J].
ISHIBASHI, N ;
KAWAI, H .
PHYSICS LETTERS B, 1994, 322 (1-2) :67-78
[9]   STRING FIELD-THEORY OF NONCRITICAL STRINGS [J].
ISHIBASHI, N ;
KAWAI, H .
PHYSICS LETTERS B, 1993, 314 (02) :190-196
[10]   TRANSFER-MATRIX FORMALISM FOR 2-DIMENSIONAL QUANTUM-GRAVITY AND FRACTAL STRUCTURES OF SPACE-TIME [J].
KAWAI, H ;
KAWAMOTO, N ;
MOGAMI, T ;
WATABIKI, Y .
PHYSICS LETTERS B, 1993, 306 (1-2) :19-26