Weak LQG metrics and Liouville first passage percolation
Abstract For $$\gamma \in (0,2)$$γ∈(0,2), we define a weak$$\gamma $$γ-Liouville quantum gravity (LQG) metric to be a function $$h\mapsto D_h$$h↦Dh which takes in an instance of the planar Gaussian free field and outputs a metric on the plane satisfying a certain list of natural axioms. We show tha...
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| Aineistotyyppi: | Artikkeli |
| Kieli: | English |
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Springer Berlin Heidelberg
2021
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| Linkit: | https://hdl.handle.net/1721.1/131625 |
| _version_ | 1826215185232166912 |
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| author | Dubédat, Julien Falconet, Hugo Gwynne, Ewain Pfeffer, Joshua Sun, Xin |
| author2 | Massachusetts Institute of Technology. Department of Mathematics |
| author_facet | Massachusetts Institute of Technology. Department of Mathematics Dubédat, Julien Falconet, Hugo Gwynne, Ewain Pfeffer, Joshua Sun, Xin |
| author_sort | Dubédat, Julien |
| collection | MIT |
| description | Abstract
For $$\gamma \in (0,2)$$γ∈(0,2), we define a weak$$\gamma $$γ-Liouville quantum gravity (LQG) metric to be a function $$h\mapsto D_h$$h↦Dh which takes in an instance of the planar Gaussian free field and outputs a metric on the plane satisfying a certain list of natural axioms. We show that these axioms are satisfied for any subsequential limits of Liouville first passage percolation. Such subsequential limits were proven to exist by Ding et al. (Tightness of Liouville first passage percolation for $$\gamma \in (0,2)$$γ∈(0,2), 2019. ArXiv e-prints, arXiv:1904.08021). It is also known that these axioms are satisfied for the $$\sqrt{8/3}$$8/3-LQG metric constructed by Miller and Sheffield (2013–2016). For any weak $$\gamma $$γ-LQG metric, we obtain moment bounds for diameters of sets as well as point-to-point, set-to-set, and point-to-set distances. We also show that any such metric is locally bi-Hölder continuous with respect to the Euclidean metric and compute the optimal Hölder exponents in both directions. Finally, we show that LQG geodesics cannot spend a long time near a straight line or the boundary of a metric ball. These results are used in subsequent work by Gwynne and Miller which proves that the weak $$\gamma $$γ-LQG metric is unique for each $$\gamma \in (0,2)$$γ∈(0,2), which in turn gives the uniqueness of the subsequential limit of Liouville first passage percolation. However, most of our results are new even in the special case when $$\gamma =\sqrt{8/3}$$γ=8/3. |
| first_indexed | 2024-09-23T16:18:10Z |
| format | Article |
| id | mit-1721.1/131625 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:18:10Z |
| publishDate | 2021 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1316252023-01-20T21:33:32Z Weak LQG metrics and Liouville first passage percolation Dubédat, Julien Falconet, Hugo Gwynne, Ewain Pfeffer, Joshua Sun, Xin Massachusetts Institute of Technology. Department of Mathematics Abstract For $$\gamma \in (0,2)$$γ∈(0,2), we define a weak$$\gamma $$γ-Liouville quantum gravity (LQG) metric to be a function $$h\mapsto D_h$$h↦Dh which takes in an instance of the planar Gaussian free field and outputs a metric on the plane satisfying a certain list of natural axioms. We show that these axioms are satisfied for any subsequential limits of Liouville first passage percolation. Such subsequential limits were proven to exist by Ding et al. (Tightness of Liouville first passage percolation for $$\gamma \in (0,2)$$γ∈(0,2), 2019. ArXiv e-prints, arXiv:1904.08021). It is also known that these axioms are satisfied for the $$\sqrt{8/3}$$8/3-LQG metric constructed by Miller and Sheffield (2013–2016). For any weak $$\gamma $$γ-LQG metric, we obtain moment bounds for diameters of sets as well as point-to-point, set-to-set, and point-to-set distances. We also show that any such metric is locally bi-Hölder continuous with respect to the Euclidean metric and compute the optimal Hölder exponents in both directions. Finally, we show that LQG geodesics cannot spend a long time near a straight line or the boundary of a metric ball. These results are used in subsequent work by Gwynne and Miller which proves that the weak $$\gamma $$γ-LQG metric is unique for each $$\gamma \in (0,2)$$γ∈(0,2), which in turn gives the uniqueness of the subsequential limit of Liouville first passage percolation. However, most of our results are new even in the special case when $$\gamma =\sqrt{8/3}$$γ=8/3. 2021-09-20T17:29:06Z 2021-09-20T17:29:06Z 2020-06-18 2020-06-26T12:35:10Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/131625 PUBLISHER_CC en https://doi.org/10.1007/s00440-020-00979-6 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Dubédat, Julien Falconet, Hugo Gwynne, Ewain Pfeffer, Joshua Sun, Xin Weak LQG metrics and Liouville first passage percolation |
| title | Weak LQG metrics and Liouville first passage percolation |
| title_full | Weak LQG metrics and Liouville first passage percolation |
| title_fullStr | Weak LQG metrics and Liouville first passage percolation |
| title_full_unstemmed | Weak LQG metrics and Liouville first passage percolation |
| title_short | Weak LQG metrics and Liouville first passage percolation |
| title_sort | weak lqg metrics and liouville first passage percolation |
| url | https://hdl.handle.net/1721.1/131625 |
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