International Journal of Theoretical Physics

, Volume 45, Issue 12, pp 2350–2376

Spacetime Topology from the Tomographic Histories Approach: Part II

  • Ioannis Raptis
  • Petros Wallden
  • Romàn R. Zapatrin


As an inverse problem, we recover the topology of the effective spacetime that a system lies in, in an operational way. This means that from a series of experiments we get a set of points corresponding to events. This continues the previous work done by the authors. Here the relativistic case is considered. The existence of upper bound in the speed of transfer of matter and information induces a partial order on the set of events. While the actual partial order is not known in our operational set up, the grouping of events to (unordered) subsets corresponding to possible histories, is given. From this we recover the partial order up to certain ambiguities that are then classified. Finally two different ways to recover the topology are sketched and their interpretation is discussed.


quantum gravity decoherent histories spacetime topology 


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Copyright information

© Springer Science + Business Media, Inc. 2006

Authors and Affiliations

  • Ioannis Raptis
    • 1
    • 2
  • Petros Wallden
    • 3
  • Romàn R. Zapatrin
    • 4
  1. 1.EU Marie Curie Reintegration Postdoctoral Research Fellow, Algebra and Geometry Section, Department of MathematicsUniversity of AthensAthensGreece
  2. 2.Visiting Researcher, Theoretical Physics Group, Blackett LaboratoryImperial College of Science, Technology and MedicineLondonUK
  3. 3.Theoretical Physics Group, Physics DepartmentImperial CollegeLondonUK
  4. 4.Department of Information ScienceThe State Russian MuseumSt.PetersburgRussia

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