Export citation

Export citation

Choose format for download:

Download Citation
  • Access by Xinjiang University

Curvature operator for loop quantum gravity

E. Alesci*, M. Assanioussi, and J. Lewandowski

  • Institute of Theoretical Physics, University of Warsaw (Instytut Fizyki Teoretycznej, Uniwersytet Warszawski), ulica Hoża 69, 00-681 Warszawa, Poland, EU

  • *emanuele.alesci@fuw.edu.pl
  • mehdi.assanioussi@fuw.edu.pl
  • jerzy.lewandowski@fuw.edu.pl

Phys. Rev. D 89, 124017 – Published 12 June, 2014

DOI: https://doi.org/10.1103/PhysRevD.89.124017

Abstract

We introduce a new operator in loop quantum gravity—the 3D curvature operator—related to the three-dimensional scalar curvature. The construction is based on Regge calculus. We define this operator starting from the classical expression of the Regge curvature, we derive its properties and discuss some explicit checks of the semiclassical limit.

Article Text

References (48)

  1. A. Ashtekar and J. Lewandowski, Classical Quantum Gravity 21, R53 (2004); T. Thiemann, Modern Canonical Quantum General Relativity (Cambridge University Press, Cambridge, England, 2007); C. Rovelli, Quantum Gravity (Cambridge University Press, Cambridge, England, 2004); M. Han, W. Huang, and Y. Ma, Int. J. Mod. Phys. D 16, 1397 (2007).
  2. A. Perez, Living Rev. Relativity 16, 3 (2013); Classical Quantum Gravity 20, R43 (2003); J. Baez, Lect. Notes Phys. 543, 25 (2000); C. Rovelli, Proc. Sci., QGQGS2011 (2011) 003.
  3. P. Dirac, Lectures on Quantum Mechanics (Yeshiva University Press, New York, 1964).
  4. A. Ashtekar, Phys. Rev. Lett. 57, 2244 (1986); J. F. Barbero, Phys. Rev. D 51, 5507 (1995).
  5. J. F. Plebanski, J. Math. Phys. (N.Y.) 18, 2511 (1977).
  6. W. Kaminski, M. Kisielowski, and J. Lewandowski, Classical Quantum Gravity 27, 095006 (2010); 29, 049502(E) (2012).
  7. C. Rovelli and L. Smolin, Phys. Rev. D 52, 5743 (1995).
  8. R. Penrose, in Quantum Theory and Beyond, edited by T. Bastin (Cambridge University Press, Cambridge, 1971).
  9. E. Bianchi, P. Dona, and S. Speziale, Phys. Rev. D 83, 044035 (2011).
  10. L. Freidel, M. Geiller, and J. Ziprick, Classical Quantum Gravity 30, 085013 (2013).
  11. T. Thiemann, Phys. Lett. B 380, 257 (1996).
  12. T. Thiemann, Classical Quantum Gravity 15, 839 (1998).
  13. C. Rovelli, Classical Quantum Gravity 8, 1613 (1991); V. Husain, Nucl. Phys. B313, 711 (1989); B. Bruegmann and J. Pullin, B363, 221 (1991); R. Gambini, Phys. Lett. B 255, 180 (1991); B. Bruegmann, R. Gambini, and J. Pullin, Nucl. Phys. B385, 587 (1992); C. Rovelli and L. Smolin, Phys. Rev. Lett. 72, 446 (1994).
  14. E. Alesci, J. Phys. Conf. Ser. 360, 012041 (2012).
  15. E. Alesci and C. Rovelli, Phys. Rev. D 82, 044007 (2010).
  16. E. Alesci, K. Liegener, and A. Zipfel, Phys. Rev. D 88, 084043 (2013).
  17. R. Borissov, R. De Pietri, and C. Rovelli, Classical Quantum Gravity 14, 2793 (1997).
  18. M. Gaul and C. Rovelli, Classical Quantum Gravity 18, 1593 (2001).
  19. E. Alesci, T. Thiemann, and A. Zipfel, Phys. Rev. D 86, 024017 (2012).
  20. T. Regge, Nuovo Cimento 19, 558 (1961).
  21. R. M. Williams and P. A. Tuckey, Classical Quantum Gravity 9, 1409 (1992).
  22. T. Thiemann, J. Math. Phys. (N.Y.) 39, 3372 (1998).
  23. E. Bianchi, Nucl. Phys. B807, 591 (2009).
  24. Y. Ma, C. Soo, and J. Yang, Phys. Rev. D 81, 124026 (2010).
  25. A. Ashtekar, A. Corichi, and J. A. Zapata, Classical Quantum Gravity 15, 2955 (1998).
  26. S. A. Major, Classical Quantum Gravity 16, 3859 (1999).
  27. E. Alesci and C. Rovelli, Phys. Rev. D 76, 104012 (2007).
  28. R. Friedberg and T. D. Lee, Nucl. Phys. B242, 145 (1984).
  29. G. Feinberg, R. Friedberg, T. D. Lee, and H. C. Ren, Nucl. Phys. B245, 343 (1984).
  30. A. Barbieri, Nucl. Phys. B518, 714 (1998).
  31. F. Conrady and L. Freidel, J. Math. Phys. (N.Y.) 50, 123510 (2009).
  32. H. Minkowski, Nachrichten von der Gesellschaft der Wissenschaften zu Göttingen, Mathematisch-Physikalische Klasse 1897, 198 (1897).
  33. C. Rovelli and L. Smolin, Nucl. Phys. B442, 593 (1995); 456, 753(E) (1995).
  34. A. Ashtekar and J. Lewandowski, Adv. Theor. Math. Phys. 1, 388 (1998); J. Lewandowski, Classical Quantum Gravity 14, 71 (1997).
  35. J. Brunnemann and T. Thiemann, Classical Quantum Gravity 23, 1289 (2006); J. Brunnemann and D. Rideout, 25, 065001 (2008); 25, 065002 (2008); E. Bianchi and H. M. Haggard, Phys. Rev. D 86, 124010 (2012); T. Thiemann, J. Math. Phys. (N.Y.) 39, 3347 (1998).
  36. E. Alesci, M. Assanioussi, and J. Lewandowski, work in progress.
  37. H. S. M. Coxeter, Regular Polytopes (Methuen, London, 1948).
  38. K. Giesel and T. Thiemann, Classical Quantum Gravity 24, 2465 (2007).
  39. E. R. Livine and S. Speziale, Phys. Rev. D 76, 084028 (2007).
  40. A. M. Perelomov, Generalized Coherent States and Their Applications (Springer-Verlag, New York, 1986).
  41. D. M. Brink and G. R. Satchler, Angular Momentum (Oxford University, New York, 1994).
  42. C. Rovelli and S. Speziale, Classical Quantum Gravity 23, 5861 (2006).
  43. M. Domagala, K. Giesel, W. Kaminski, and J. Lewandowski, Phys. Rev. D 82, 104038 (2010).
  44. V. Husain and T. Pawlowski, Phys. Rev. Lett. 108, 141301 (2012).
  45. E. Alesci, F. Cianfrani, and C. Rovelli, Phys. Rev. D 88, 104001 (2013).
  46. E. Alesci and F. Cianfrani, Phys. Rev. D 87, 083521 (2013).
  47. E. Alesci and F. Cianfrani, Europhys. Lett. 104, 10001 (2013).
  48. E. Alesci and F. Cianfrani, arXiv:1402.3155.

Sign In to Your Journals Account

Filter

Filter

Article Lookup

Enter a citation