Disordered locality as an explanation for the dark energy

@article{PrescodWeinstein2009DisorderedLA,
  title={Disordered locality as an explanation for the dark energy},
  author={Chanda Prescod-Weinstein and Lee Smolin},
  journal={Physical Review D},
  year={2009},
  volume={80},
  pages={063505}
}
We discuss a novel explanation of the dark energy as a manifestation of macroscopic nonlocality coming from quantum gravity, as proposed by Markopoulou [F. Markopoulou (private communication)]. It has been previously suggested that in a transition from an early quantum geometric phase of the Universe to a low temperature phase characterized by an emergent spacetime metric, locality might have been ``disordered.'' This means that there is a mismatch of micro-locality, as determined by the… 

MOND as a regime of quantum gravity

We propose that there is a regime of quantum gravity phenomena, for the case that the cosmological constant is small and positive, which concerns phenomena at temperatures below the deSitter

End of a Dark Age

We argue that dark matter and dark energy phenomena associated with galactic rotation curves, X-ray cluster mass profiles, and type Ia supernova data can be accounted for via small corrections to

Dark Matter as a Metric Perturbation

Since general relativity (GR) has already established that matter can simultaneously have two different values of mass depending on its context, we argue that the missing mass attributed to

Potential Consequences of Wormhole-Mediated Entanglement

There are hints that the connectivity of space-time in quantum gravity could emerge from entanglement, and it has further been proposed that any two entangled particles may be connected by a quantum

Phenomenology of Space-time Imperfection I: Nonlocal Defects

If space-time is emergent from a fundamentally non-geometr ic theory it will generically be left with defects. Such defects need not resp ect the locality that emerges with the background. Here, we

Generalized conservation laws in non-local field theories

We propose a geometrical treatment of symmetries in non-local field theories, where the non-locality is due to a lack of identification of field arguments in the action. We show that the existence of

Theory and Phenomenology of Space-Time Defects

Whether or not space-time is fundamentally discrete is of central importance for the development of the theory of quantum gravity. If the fundamental description of spacetime is discrete, typically

Emergent Models for Gravity: an Overview of Microscopic Models

We give a critical overview of various attempts to describe gravity as an emergent phenomenon, starting from examples of condensed matter physics, to arrive to more sophisticated pregeometric models.

An Adynamical, Graphical Approach to Quantum Gravity and Unification

We use graphical field gradients in an adynamical, background independent fashion to propose a new approach to quantum gravity and unification. Our proposed reconciliation of general relativity and

What is Time in Some Modern Physics Theories: Interpretation Problems

Analysis of the key theories of modern physics with regard to historical and scientific, historical and philosophical perspectives is carried out to detect the succession of the associated with time perception ideas, their development, as well as the origination of fundamentally new ones.

References

SHOWING 1-9 OF 9 REFERENCES

Disordered locality in loop quantum gravity states

We show that loop quantum gravity suffers from a potential problem with non-locality, coming from a mismatch between micro-locality, as defined by the combinatorial structures of their microscopic

Holography and the scale invariance of density fluctuations

We study a scenario for the very early universe in which there is a fast phase transition from a non-geometric, high temperature phase to a low temperature, geometric phase described by a classical

Roughness scaling for Edwards-Wilkinson relaxation in small-world networks.

A perturbative description is constructed for the width of the stationary-state surface (a measure of synchronization), in the weak- and sparse-coupling limits, respectively, and the width remains finite in the limit of infinite system size for both cases, but exhibits anomalous scaling with p in the latter for d< or =2.

An ǫ-expansion for Small-World Networks

– I construct a well-defined expansion in ǫ = 2 − d for diffusion processes on small-world networks. The technique permits one to calculate the average over disorder of moments of the Green's

New directions in Background Independent Quantum Gravity

We discuss the meaning of background independence in quantum theories of gravity where geometry and gravity are emergent and illustrate the possibilities using the framework of quantum causal

Diffusion processes on power-law small-world networks.

In one dimension, a rich phase diagram is found, with different transient and recurrent phases, including a critical line with continuously varying exponents, which provides a general framework for understanding processes on small-world networks with different distributions of long-range links.

Quantum graphity: A model of emergent locality

Quantum graphity is a background-independent model for emergent macroscopic locality, spatial geometry and matter. The states of the system correspond to dynamical graphs on N vertices. At high

We define the comoving volume in the typical fashion, as determined by the length scale associated with comoving coordinates and scale factor a

    If the state is composed of a superposition of micro-local states labeled by graphs then microlocality is defined seperately for each state in the superposition