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Journal of High Energy Physics, 2021 In this work, we extend the 2d topological gravity model of [1] to have as its bulk action any open/closed TQFT obeying Atiyah’s axioms. The holographic duals of these topological gravity models are ensembles of 1d topological theories with random ...
John Gardiner, Stathis Megas
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COSMOLOGICAL SOLUTIONS IN 2D POINCARÉ GRAVITY [PDF]
International Journal of Modern Physics D, 1994 The 2D model of gravity with zweibeins ea and the Lorentz connection one-form [Formula: see text] as independent gravitational variables is considered. The solutions of classical equations of motion which can be interpreted as cosmological ones are studied.
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Towards unified theory of 2d gravity [PDF]
Nuclear Physics B, 1992 We introduce a new 1-matrix model with arbitrary potential and the matrix-valued background field. Its partition function is a $τ$-function of KP-hierarchy, subjected to a kind of ${\cal L}_{-1}$-constraint. Moreover, partition function behaves smoothly in the limit of infinitely large matrices.
Kharchev, S. +4 more
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Relational observables in 2D quantum gravity [PDF]
Physical Review D, 2007 Local observation is an important problem both for the foundations of a quantum theory of gravity and for applications to quantum-cosmological problems such as eternal inflation. While gauge invariant local observables can't be defined, it has been argued that appropriate relational observables approximately reduce to local observables in certain ...
Gary, Michael, Giddings, Steven B.
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A locally finite model for gravity [PDF]
, 2008 Matter interacting classically with gravity in 3+1 dimensions usually gives rise to a continuum of degrees of freedom, so that, in any attempt to quantize the theory, ultraviolet divergences are nearly inevitable.
't Hooft, G. +3 more
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CANONICAL APPROACH TO 2D INDUCED GRAVITY [PDF]
Modern Physics Letters A, 2001 Using canonical method the Liouville theory has been obtained as a gravitational Wess–Zumino action of the Polyakov string. From this approach it is clear that the form of the Liouville action is the consequence of the bosonic representation of the Virasoro algebra, and that the coefficient in front of the action is proportional to the central charge ...
Popovic, D. S., Sazdovic, B.
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2D behavior of Gravity at Large Distances
, 2023 We show that the entropy or information flow of a gravitational system constrains the dependence of gravitational force on radial distance r which for very large r is equivalent to gravity in two dimensions. This explains the "origin" of dark matter and provides a natural solution to the problem of flat rotation curves of galaxies at very large ...
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Interpreting Quantum Gravity. [PDF]
, 2005 This is an essay review of two textbooks on quantum gravity by Carlo Rovelli and Claus ...
Dean Rickles, Rickles, Dean
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Scientific Reports, 2021 Due to the independence of the gradiometer instrument’s orientation in space, the second invariant $$I_2$$ I 2 of gravity gradients in combination with individual gravity gradients are demonstrated to be valid for gravity field determination.
Lin Cai +6 more
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2D Lorentzian Gravity as 2D Euclidean Gravity with Ising Spins
, 1996 Latex (6 Pages) and 4 postscript figures, uufiled ...
Beirl, W., Johnston, D. A.
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