Ocorreu um erro neste gadget

quarta-feira, dezembro 09, 2009

Fotini, Fótons, Espaço e Tempo


Eu imagino que Fotini está acima dessas piadinhas machistas, de modo que reproduzo aqui. Estou lendo alguns de seus papers que estão no ArXiv (ver abaixo). Li o numero 2, sugerido peloo Ion Vasili Vancea, e gostei muito. Quem sabe daria para trabalhar em modelos de redes que, sofrendo uma transição de fase, geram a geometria da relatividade geral.


1. arXiv:0911.5075 [pdf, other]
A quantum Bose-Hubbard model with evolving graph as toy model for emergent spacetime
Comments: 23 pages, 6 figures; Typos corrected
Subjects: General Relativity and Quantum Cosmology (gr-qc); Strongly Correlated Electrons (cond-mat.str-el); High Energy Physics - Theory (hep-th); Quantum Physics (quant-ph)
2. arXiv:0909.1861 [pdf, other]
Space does not exist, so time can
Comments: Third prize of the FQXi 'The Nature of Time' Essay Contest
Subjects: General Relativity and Quantum Cosmology (gr-qc)
3. arXiv:0808.2495 [ps, pdf, other]
Lieb-Robinson bounds and the speed of light from topological order
Comments: 4 pages, 1 eps figure. Bound improved
Journal-ref: Phys.Rev.Lett.102:017204,2009
Subjects: Quantum Physics (quant-ph); Strongly Correlated Electrons (cond-mat.str-el); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Lattice (hep-lat)
4. arXiv:0805.3175 [pdf, other]
Conserved Topological Defects in Non-Embedded Graphs in Quantum Gravity
Comments: 42 pages, 34 figures
Journal-ref: Class.Quant.Grav.25:205015,2008
Subjects: General Relativity and Quantum Cosmology (gr-qc)
5. arXiv:0801.0861 [ps, pdf, other]
Quantum Graphity: a model of emergent locality
Comments: 25 pages
Journal-ref: Phys.Rev.D77:104029,2008
Subjects: High Energy Physics - Theory (hep-th); General Relativity and Quantum Cosmology (gr-qc); Quantum Physics (quant-ph)
6. arXiv:gr-qc/0703097 [ps, pdf, other]
New directions in Background Independent Quantum Gravity
Comments: Comments 26 pages. Contribution to "Approaches to Quantum Gravity - toward a new understanding of space, time, and matter", edited by D. Oriti, to be published by Cambridge University Press
Subjects: General Relativity and Quantum Cosmology (gr-qc)
7. arXiv:gr-qc/0703027 [ps, pdf, other]
Conserved Quantities in Background Independent Theories
Comments: 11 pages, 3 figures
Journal-ref: J.Phys.Conf.Ser.67:012019,2007
Subjects: General Relativity and Quantum Cosmology (gr-qc)
8. arXiv:gr-qc/0702044 [ps, pdf, other]
Disordered locality in loop quantum gravity states
Comments: 11 pages, 4 figures, revision with extended discussion of results
Journal-ref: Class.Quant.Grav.24:3813-3824,2007
Subjects: General Relativity and Quantum Cosmology (gr-qc)
9. arXiv:gr-qc/0601028 [ps, pdf, other]
Constrained Mechanics and Noiseless Subsystems
Comments: 15 pages
Subjects: General Relativity and Quantum Cosmology (gr-qc); Quantum Physics (quant-ph)
10. arXiv:gr-qc/0510052 [ps, pdf, other]
Geometry from quantum particles
Comments: 17 pages, LaTex
Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)
11. arXiv:hep-th/0505165 [ps, pdf, other]
A statistical formalism of Causal Dynamical Triangulations
Comments: 21 pages, 19 pictures, 1 graph, Published in section: Field Theory And Statistical Systems
Journal-ref: NPB 726 (2005) 494-509
Subjects: High Energy Physics - Theory (hep-th); Statistical Mechanics (cond-mat.stat-mech); General Relativity and Quantum Cosmology (gr-qc)
12. arXiv:hep-th/0409057 [ps, pdf, other]
Gauge fixing in Causal Dynamical Triangulations
Comments: 14 pages, 2 figures
Journal-ref: Nucl.Phys. B739 (2006) 120-130
Subjects: High Energy Physics - Theory (hep-th); General Relativity and Quantum Cosmology (gr-qc)
13. arXiv:hep-th/0409056 [ps, pdf, other]
Symmetry and entropy of black hole horizons
Comments: 17 pages, 1 figure, some criticisms of the result are answered
Journal-ref: Nucl.Phys. B744 (2006) 1-13
Subjects: High Energy Physics - Theory (hep-th); General Relativity and Quantum Cosmology (gr-qc)
14. arXiv:gr-qc/0311059 [ps, pdf, other]
Quantum Theory from Quantum Gravity
Comments: 17 pages, 2 eps figures
Journal-ref: Phys.Rev. D70 (2004) 124029
Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th); Quantum Physics (quant-ph)
15. arXiv:hep-th/0302111 [ps, pdf, other]
Evolution in Quantum Causal Histories
Comments: 20 pages. 8 figures. (v3: minor corrections, additional references [2,3]) to appear in CQG
Journal-ref: Class.Quant.Grav. 20 (2003) 3839
Subjects: High Energy Physics - Theory (hep-th); General Relativity and Quantum Cosmology (gr-qc)
16. arXiv:gr-qc/0210086 [ps, pdf, other]
Planck-scale models of the Universe
Comments: 19 pages, 8 figures. Invited contribution to ``Science & Ultimate Reality: From Quantum to Cosmos (Explorations Celebrating the Vision of John Archibald Wheeler)''. References added
Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)
17. arXiv:gr-qc/0203036 [ps, pdf, other]
Coarse graining in spin foam models
Comments: 38 pages, many eps figures
Journal-ref: Class.Quant.Grav. 20 (2003) 777-800
Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)
18. arXiv:hep-th/0006199 [ps, pdf, other]
An algebraic approach to coarse graining
Comments: Latex, 20 pages, 12 eps figures
Subjects: High Energy Physics - Theory (hep-th); Condensed Matter (cond-mat); General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Lattice (hep-lat)
19. arXiv:hep-th/9910146 [ps, pdf, other]
Holography in a quantum spacetime
Comments: 16 pages, LaTeX
Subjects: High Energy Physics - Theory (hep-th); General Relativity and Quantum Cosmology (gr-qc)
20. arXiv:hep-th/9904009 [ps, pdf, other]
Quantum causal histories
Comments: 16 pages, epsfig latex. Some clarifications, minor corrections and references added. Version to appear in Classical and Quantum Gravity
Journal-ref: Class.Quant.Grav. 17 (2000) 2059-2072
Subjects: High Energy Physics - Theory (hep-th); General Relativity and Quantum Cosmology (gr-qc)
21. arXiv:gr-qc/9811053 [ps, pdf, other]
The internal description of a causal set: What the universe looks like from the inside
Comments: Version to appear in Comm.Math.Phys. (minor modifications). 37 pages, several eps figures
Journal-ref: Commun.Math.Phys. 211 (2000) 559-583
Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)
22. arXiv:hep-th/9712148 [ps, pdf, other]
Nonperturbative dynamics for abstract (p,q) string networks
Comments: Latex, 12 pages, epsfig, 7 figures, minor changes
Journal-ref: Phys.Rev. D58 (1998) 084033
Subjects: High Energy Physics - Theory (hep-th); General Relativity and Quantum Cosmology (gr-qc)
23. arXiv:gr-qc/9712067 [ps, pdf, other]
Quantum geometry with intrinsic local causality
Comments: Latex 33 pages, 7 Figure, epsfig
Journal-ref: Phys.Rev. D58 (1998) 084032
Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Theory (hep-th)
24. arXiv:gr-qc/9704013 [ps, pdf, other]
Dual formulation of spin network evolution
Comments: Latex, 20 pages, 16 figures
Subjects: General Relativity and Quantum Cosmology (gr-qc)
25. arXiv:gr-qc/9702046 [ps, pdf, other]
4D diffeomorphisms in canonical gravity and abelian deformations
Comments: latex, 19 pages, 2 figures
Subjects: General Relativity and Quantum Cosmology (gr-qc)

Um comentário:

none disse...

Kino,

Tem um trabalho que afirma que, visto de dentro, um buraco negro parece se expandir.
http://www.springerlink.com/content/t174670864g87g65/

Lendo um dos livros de divulgação de Brian Greene, parece que havia um teorema sobre dimensões enroladas que igualava diâmetros decrescentes dessas dimensões com diâmetros crescentes.

É possível ligar uma coisa com a outra. E ainda com a expansão do Universo visível?

[]s,

Roberto Takata