From Quantum Hydrodynamics to Quantum Gravity

Volovik, G. E.

doi:10.1142/9789812834300_0170

Cited by 18 publications

(29 citation statements)

References 41 publications

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“…the quantum theory of its "atomic" building blocks. This perspective has been advocated already in [51] and it resonates with other ideas about spacetime as a condensate [52,53] (see also [49] for some recent results in this direction). In practice, the possibility that continuum spacetime physics is to be looked for in the regime in which (infinitely) many quantum building blocks, with their associated degrees of freedom, are interacting, leads immediately to the need for ideas and techniques from statistical field theory.…”

Section: Lessons For Group Field Theories and Quantum Gravity Ansupporting

confidence: 62%

Discrete and Continuum Third Quantization of Gravity

Gielen

Oriti

2012

Quantum Field Theory and Gravity

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EUWe give a brief introduction to matrix models and the group field theory (GFT) formalism as realizations of the idea of a third quantization of gravity, and present in some more detail the idea and basic features of a continuum third quantization formalism in terms of a field theory on the space of connections, building up on the results of loop quantum gravity that allow to make the idea slightly more concrete. We explore to what extent one can rigorously define such a field theory. Concrete examples are given for the simple case of Riemannian GR in 3 spacetime dimensions. We discuss the relation between GFT and this formal continuum third quantized gravity, and what it can teach us about the continuum limit of GFTs.

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Section: Lessons For Group Field Theories and Quantum Gravity Ansupporting

confidence: 62%

Discrete and Continuum Third Quantization of Gravity

Gielen

Oriti

2012

Quantum Field Theory and Gravity

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“…A microscopic analysis of the micro-theory underlying acoustic Hawking radiation in a “piston” geometry appeared in [248]. Volovik extended and explained his views on quantum hydrodynamics as a model for quantum gravity in [664]. Applications to the cosmological constant were considered in [543].…”

Section: Historymentioning

confidence: 99%

Analogue Gravity

Barceló

Liberati

Visser

2011

Living Rev. Relativ.

712

1,080

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Analogue gravity is a research programme which investigates analogues of general relativistic gravitational fields within other physical systems, typically but not exclusively condensed matter systems, with the aim of gaining new insights into their corresponding problems. Analogue models of (and for) gravity have a long and distinguished history dating back to the earliest years of general relativity. In this review article we will discuss the history, aims, results, and future prospects for the various analogue models. We start the discussion by presenting a particularly simple example of an analogue model, before exploring the rich history and complex tapestry of models discussed in the literature. The last decade in particular has seen a remarkable and sustained development of analogue gravity ideas, leading to some hundreds of published articles, a workshop, two books, and this review article. Future prospects for the analogue gravity programme also look promising, both on the experimental front (where technology is rapidly advancing) and on the theoretical front (where variants of analogue models can be used as a springboard for radical attacks on the problem of quantum gravity).

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“…Thus, it is important to stress here that deviations from Lorentz invariance need not occur at the Planck scale (and indeed Lorentz violations at the Planck scale are almost excluded by experimental observations; see [48,49]). On the contrary, there are strong arguments suggesting that, if general relativity is an emergent theory, Lorentz symmetry must be very accurately respected at the Planck scale [11,50], and the characteristic energy scale of Lorentz symmetry breaking should be several orders of magnitude higher than the Planck scale. We intend to approach the gravitational emergent problem in a future work.…”

Section: Discussionmentioning

confidence: 99%

Electromagnetism as an emergent phenomenon: a step-by-step guide

et al. 2014

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We give a detailed description of electrodynamics as an emergent theory from condensed-matter-like structures, not only per se but also as a warm-up for the study of the much more complex case of gravity. We concentrate on two scenarios that, although qualitatively different, share some important features with the idea of extracting the basic generic ingredients that give rise to emergent electrodynamics and, more generally, to gauge theories. We start with Max-wellʼs mechanical model for electrodynamics, where Maxwellʼs equations appear as dynamical consistency conditions. We next take a superfluid 3 He-like system as representative of a broad class of fermionic quantum systems whose low-energy physics reproduces classical electrodynamics (Dirac and Maxwell equations as dynamical low-energy laws). An important lesson that can be derived from both analyses is that the vector potential has a microscopic physical reality and only in the low-energy regime is this physical reality blurred in favor of gauge invariance, which in addition turns out to be secondary to effective Lorentz invariance. 4 New J. Phys. 16 (2014) 123028 C Barceló et al −   ( ) B J J J D t ;.T T Q 0 6 New J. Phys. 16 (2014) 123028 C Barceló et al New J. Phys. 16 (2014) 123028 C Barceló et al New J. Phys. 16 (2014) 123028 C Barceló et al

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From Quantum Hydrodynamics to Quantum Gravity

Abstract: We discuss some lessons from quantum hydrodynamics to quantum gravity.

Cited by 18 publications

References 41 publications

Discrete and Continuum Third Quantization of Gravity

Discrete and Continuum Third Quantization of Gravity

Analogue Gravity

Electromagnetism as an emergent phenomenon: a step-by-step guide

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