{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,5,7]],"date-time":"2025-05-07T20:40:01Z","timestamp":1746650401411,"version":"3.40.5"},"reference-count":48,"publisher":"Springer Science and Business Media LLC","issue":"4","license":[{"start":{"date-parts":[[2025,4,1]],"date-time":"2025-04-01T00:00:00Z","timestamp":1743465600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2025,4,1]],"date-time":"2025-04-01T00:00:00Z","timestamp":1743465600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["J. High Energ. Phys."],"abstract":"<jats:title>A<jats:sc>bstract<\/jats:sc>\n          <\/jats:title>\n          <jats:p>We investigate a strongly coupled finite-density anisotropic fluid in 2 + 1 dimensions dual to an asymptotically AdS black brane that is a solution of Einstein-Maxwell-Axion theory in 3 + 1 dimensions. Despite the anisotropy, the fluid thermodynamic properties align with those of a conformal fluid. Moreover, we show that the fluid is stable under the increase of the anisotropy parameter. Additionally, we analyse the DC conductivity of the anisotropic fluid, showing its compatibility with momentum dissipation due to translational symmetry breaking. In the limit of very large anisotropy we find that the DC conductivity vanishes as a consequence of dimensionality reduction. We also find that a metal-insulator transition arises driven by the anisotropy.<\/jats:p>","DOI":"10.1007\/jhep04(2025)002","type":"journal-article","created":{"date-parts":[[2025,4,4]],"date-time":"2025-04-04T00:55:17Z","timestamp":1743728117000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Thermodynamics and DC conductivity of 2D anisotropic fluids from axion holography"],"prefix":"10.1007","volume":"2025","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5237-3456","authenticated-orcid":false,"given":"Alfonso","family":"Ballon-Bayona","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03490as77","id-type":"ROR","asserted-by":"publisher"}],"name":"Universidade Federal do Rio de Janeiro"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3757-0376","authenticated-orcid":false,"given":"Jonathan P.","family":"Shock","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/03p74gp79","id-type":"ROR","asserted-by":"publisher"}],"name":"University of Cape Town"},{"name":"The National Institute for Theoretical and Computational Sciences"},{"id":[{"id":"https:\/\/ror.org\/04td37d32","id-type":"ROR","asserted-by":"publisher"}],"name":"Institut National de la Recherche Scientifique"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5991-4769","authenticated-orcid":false,"given":"Dimitrios","family":"Zoakos","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/017wvtq80","id-type":"ROR","asserted-by":"publisher"}],"name":"University of Patras"},{"id":[{"id":"https:\/\/ror.org\/04gnjpq42","id-type":"ROR","asserted-by":"publisher"}],"name":"National and Kapodistrian University of Athens"}]}],"member":"297","published-online":{"date-parts":[[2025,4,1]]},"reference":[{"key":"25876_CR1","doi-asserted-by":"publisher","unstructured":"M. Ammon and J. Erdmenger, Gauge\/gravity duality: Foundations and applications, Cambridge University Press, Cambridge (2015) [https:\/\/doi.org\/10.1017\/CBO9780511846373] [INSPIRE].","DOI":"10.1017\/CBO9780511846373"},{"key":"25876_CR2","unstructured":"S.A. Hartnoll, A. Lucas and S. Sachdev, Holographic Quantum Matter, MIT Press (2018)."},{"key":"25876_CR3","doi-asserted-by":"publisher","unstructured":"J. Zaanen, Y.-W. Sun, Y. Liu and K. Schalm, Holographic Duality in Condensed Matter Physics, Cambridge Univ. Press (2015) [https:\/\/doi.org\/10.1017\/CBO9781139942492] [INSPIRE].","DOI":"10.1017\/CBO9781139942492"},{"key":"25876_CR4","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.101.031601","volume":"101","author":"SA Hartnoll","year":"2008","unstructured":"S.A. Hartnoll, C.P. Herzog and G.T. Horowitz, Building a Holographic Superconductor, Phys. Rev. Lett. 101 (2008) 031601 [arXiv:0803.3295] [INSPIRE].","journal-title":"Phys. Rev. Lett."},{"key":"25876_CR5","doi-asserted-by":"publisher","first-page":"015","DOI":"10.1088\/1126-6708\/2008\/12\/015","volume":"12","author":"SA Hartnoll","year":"2008","unstructured":"S.A. Hartnoll, C.P. Herzog and G.T. Horowitz, Holographic Superconductors, JHEP 12 (2008) 015 [arXiv:0810.1563] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR6","doi-asserted-by":"publisher","first-page":"313","DOI":"10.1007\/978-3-642-04864-7_10","volume":"828","author":"GT Horowitz","year":"2011","unstructured":"G.T. Horowitz, Introduction to Holographic Superconductors, Lect. Notes Phys. 828 (2011) 313 [arXiv:1002.1722] [INSPIRE].","journal-title":"Lect. Notes Phys."},{"key":"25876_CR7","doi-asserted-by":"publisher","DOI":"10.1103\/RevModPhys.95.011001","volume":"95","author":"M Baggioli","year":"2023","unstructured":"M. Baggioli and B. Gout\u00e9raux, Colloquium: hydrodynamics and holography of charge density wave phases, Rev. Mod. Phys. 95 (2023) 011001 [arXiv:2203.03298] [INSPIRE].","journal-title":"Rev. Mod. Phys."},{"key":"25876_CR8","doi-asserted-by":"publisher","first-page":"168","DOI":"10.1007\/JHEP07(2012)168","volume":"07","author":"GT Horowitz","year":"2012","unstructured":"G.T. Horowitz, J.E. Santos and D. Tong, Optical Conductivity with Holographic Lattices, JHEP 07 (2012) 168 [arXiv:1204.0519] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR9","doi-asserted-by":"publisher","first-page":"102","DOI":"10.1007\/JHEP11(2012)102","volume":"11","author":"GT Horowitz","year":"2012","unstructured":"G.T. Horowitz, J.E. Santos and D. Tong, Further Evidence for Lattice-Induced Scaling, JHEP 11 (2012) 102 [arXiv:1209.1098] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR10","doi-asserted-by":"publisher","first-page":"087","DOI":"10.1007\/JHEP06(2013)087","volume":"06","author":"GT Horowitz","year":"2013","unstructured":"G.T. Horowitz and J.E. Santos, General Relativity and the Cuprates, JHEP 06 (2013) 087 [arXiv:1302.6586] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR11","doi-asserted-by":"publisher","first-page":"035","DOI":"10.1007\/JHEP01(2015)035","volume":"01","author":"A Donos","year":"2015","unstructured":"A. Donos and J.P. Gauntlett, The thermoelectric properties of inhomogeneous holographic lattices, JHEP 01 (2015) 035 [arXiv:1409.6875] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR12","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevD.81.044018","volume":"81","author":"S Nakamura","year":"2010","unstructured":"S. Nakamura, H. Ooguri and C.-S. Park, Gravity Dual of Spatially Modulated Phase, Phys. Rev. D 81 (2010) 044018 [arXiv:0911.0679] [INSPIRE].","journal-title":"Phys. Rev. D"},{"key":"25876_CR13","doi-asserted-by":"publisher","first-page":"140","DOI":"10.1007\/JHEP08(2011)140","volume":"08","author":"A Donos","year":"2011","unstructured":"A. Donos and J.P. Gauntlett, Holographic striped phases, JHEP 08 (2011) 140 [arXiv:1106.2004] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR14","doi-asserted-by":"publisher","first-page":"101","DOI":"10.1007\/JHEP05(2014)101","volume":"05","author":"T Andrade","year":"2014","unstructured":"T. Andrade and B. Withers, A simple holographic model of momentum relaxation, JHEP 05 (2014) 101 [arXiv:1311.5157] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR15","unstructured":"D. Vegh, Holography without translational symmetry, arXiv:1301.0537 [INSPIRE]."},{"key":"25876_CR16","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevD.88.086003","volume":"88","author":"RA Davison","year":"2013","unstructured":"R.A. Davison, Momentum relaxation in holographic massive gravity, Phys. Rev. D 88 (2013) 086003 [arXiv:1306.5792] [INSPIRE].","journal-title":"Phys. Rev. D"},{"key":"25876_CR17","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevD.88.106004","volume":"88","author":"M Blake","year":"2013","unstructured":"M. Blake and D. Tong, Universal Resistivity from Holographic Massive Gravity, Phys. Rev. D 88 (2013) 106004 [arXiv:1308.4970] [INSPIRE].","journal-title":"Phys. Rev. D"},{"key":"25876_CR18","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.112.071602","volume":"112","author":"M Blake","year":"2014","unstructured":"M. Blake, D. Tong and D. Vegh, Holographic Lattices Give the Graviton an Effective Mass, Phys. Rev. Lett. 112 (2014) 071602 [arXiv:1310.3832] [INSPIRE].","journal-title":"Phys. Rev. Lett."},{"key":"25876_CR19","doi-asserted-by":"publisher","first-page":"114","DOI":"10.1007\/JHEP02(2016)114","volume":"02","author":"L Alberte","year":"2016","unstructured":"L. Alberte, M. Baggioli, A. Khmelnitsky and O. Pujolas, Solid Holography and Massive Gravity, JHEP 02 (2016) 114 [arXiv:1510.09089] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR20","doi-asserted-by":"publisher","DOI":"10.1007\/s11433-021-1681-8","volume":"64","author":"M Baggioli","year":"2021","unstructured":"M. Baggioli, K.-Y. Kim, L. Li and W.-J. Li, Holographic Axion Model: a simple gravitational tool for quantum matter, Sci. China Phys. Mech. Astron. 64 (2021) 270001 [arXiv:2101.01892] [INSPIRE].","journal-title":"Sci. China Phys. Mech. Astron."},{"key":"25876_CR21","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevD.76.066001","volume":"76","author":"SA Hartnoll","year":"2007","unstructured":"S.A. Hartnoll and P. Kovtun, Hall conductivity from dyonic black holes, Phys. Rev. D 76 (2007) 066001 [arXiv:0704.1160] [INSPIRE].","journal-title":"Phys. Rev. D"},{"key":"25876_CR22","doi-asserted-by":"publisher","first-page":"054","DOI":"10.1007\/JHEP07(2011)054","volume":"07","author":"D Mateos","year":"2011","unstructured":"D. Mateos and D. Trancanelli, Thermodynamics and Instabilities of a Strongly Coupled Anisotropic Plasma, JHEP 07 (2011) 054 [arXiv:1106.1637] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR23","doi-asserted-by":"publisher","first-page":"005","DOI":"10.1007\/JHEP01(2015)005","volume":"01","author":"S Jain","year":"2015","unstructured":"S. Jain et al., A Strongly Coupled Anisotropic Fluid From Dilaton Driven Holography, JHEP 01 (2015) 005 [arXiv:1406.4874] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR24","doi-asserted-by":"publisher","first-page":"013","DOI":"10.1007\/JHEP09(2020)013","volume":"09","author":"M Baggioli","year":"2020","unstructured":"M. Baggioli, V.C. Castillo and O. Pujolas, Black Rubber and the Non-linear Elastic Response of Scale Invariant Solids, JHEP 09 (2020) 013 [arXiv:2006.10774] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR25","doi-asserted-by":"crossref","unstructured":"D. Pan et al., Nonlinear elasticity, yielding, and entropy in amorphous solids, Sci. Adv. 8 (2022) abm8028 [arXiv:2108.13124] [INSPIRE].","DOI":"10.1126\/sciadv.abm8028"},{"key":"25876_CR26","doi-asserted-by":"publisher","DOI":"10.1088\/1572-9494\/aca0e1","volume":"75","author":"T Ji","year":"2023","unstructured":"T. Ji, L. Li and H.-T. Sun, Thermoelectric transport in holographic quantum matter under shear strain, Commun. Theor. Phys. 75 (2023) 015401 [arXiv:2208.08803] [INSPIRE].","journal-title":"Commun. Theor. Phys."},{"key":"25876_CR27","doi-asserted-by":"crossref","unstructured":"L.D. Landau and E.M. Lifshitz, Statistical Physics, Part 1, Butterworth-Heinemann, Oxford (1980) [INSPIRE].","DOI":"10.1016\/B978-0-08-057046-4.50008-7"},{"key":"25876_CR28","doi-asserted-by":"crossref","unstructured":"A. Ballon-Bayona, J.P. Shock and D. Zoakos, Magnetising the $$ \\mathcal{N} $$ = 4 Super Yang-Mills plasma, JHEP 06 (2022) 154 [arXiv:2203.00050] [INSPIRE].","DOI":"10.1007\/JHEP06(2022)154"},{"key":"25876_CR29","unstructured":"G. Strang, Introduction to Linear Algebra, fourth ed., Wellesley-Cambridge Press, Wellesley, MA (2009)."},{"key":"25876_CR30","doi-asserted-by":"publisher","first-page":"081","DOI":"10.1007\/JHEP11(2014)081","volume":"11","author":"A Donos","year":"2014","unstructured":"A. Donos and J.P. Gauntlett, Thermoelectric DC conductivities from black hole horizons, JHEP 11 (2014) 081 [arXiv:1406.4742] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR31","doi-asserted-by":"publisher","first-page":"124","DOI":"10.1007\/JHEP08(2015)124","volume":"08","author":"M Blake","year":"2015","unstructured":"M. Blake, A. Donos and N. Lohitsiri, Magnetothermoelectric Response from Holography, JHEP 08 (2015) 124 [arXiv:1502.03789] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR32","doi-asserted-by":"publisher","first-page":"040","DOI":"10.1007\/JHEP04(2014)040","volume":"04","author":"A Donos","year":"2014","unstructured":"A. Donos and J.P. Gauntlett, Holographic Q-lattices, JHEP 04 (2014) 040 [arXiv:1311.3292] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR33","doi-asserted-by":"crossref","unstructured":"F. Kottler, \u00dcber die physikalischen Grundlagen der Einsteinschen Gravitationstheorie, Annalen Phys. 361 (1918) 401 [INSPIRE].","DOI":"10.1002\/andp.19183611402"},{"key":"25876_CR34","doi-asserted-by":"publisher","first-page":"395","DOI":"10.1016\/0550-3213(92)90684-4","volume":"383","author":"LJ Romans","year":"1992","unstructured":"L.J. Romans, Supersymmetric, cold and lukewarm black holes in cosmological Einstein-Maxwell theory, Nucl. Phys. B 383 (1992) 395 [hep-th\/9203018] [INSPIRE].","journal-title":"Nucl. Phys. B"},{"key":"25876_CR35","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevD.60.104026","volume":"60","author":"A Chamblin","year":"1999","unstructured":"A. Chamblin, R. Emparan, C.V. Johnson and R.C. Myers, Holography, thermodynamics and fluctuations of charged AdS black holes, Phys. Rev. D 60 (1999) 104026 [hep-th\/9904197] [INSPIRE].","journal-title":"Phys. Rev. D"},{"key":"25876_CR36","doi-asserted-by":"publisher","unstructured":"H. Stephani et al., Exact solutions of Einstein\u2019s field equations, Cambridge Univ. Press, Cambridge (2003) [https:\/\/doi.org\/10.1017\/CBO9780511535185] [INSPIRE].","DOI":"10.1017\/CBO9780511535185"},{"key":"25876_CR37","doi-asserted-by":"publisher","first-page":"170","DOI":"10.1007\/JHEP12(2014)170","volume":"12","author":"K-Y Kim","year":"2014","unstructured":"K.-Y. Kim, K.K. Kim, Y. Seo and S.-J. Sin, Coherent\/incoherent metal transition in a holographic model, JHEP 12 (2014) 170 [arXiv:1409.8346] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR38","doi-asserted-by":"publisher","first-page":"083","DOI":"10.1007\/JHEP07(2014)083","volume":"07","author":"L Cheng","year":"2014","unstructured":"L. Cheng, X.-H. Ge and S.-J. Sin, Anisotropic plasma at finite U(1) chemical potential, JHEP 07 (2014) 083 [arXiv:1404.5027] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR39","unstructured":"S.A. Hartnoll, A. Lucas and S. Sachdev, Holographic quantum matter, arXiv:1612.07324 [INSPIRE]."},{"key":"25876_CR40","doi-asserted-by":"publisher","first-page":"088","DOI":"10.1088\/1126-6708\/2009\/10\/088","volume":"10","author":"E D\u2019Hoker","year":"2009","unstructured":"E. D\u2019Hoker and P. Kraus, Magnetic Brane Solutions in AdS, JHEP 10 (2009) 088 [arXiv:0908.3875] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR41","doi-asserted-by":"publisher","first-page":"180","DOI":"10.1007\/JHEP03(2021)180","volume":"03","author":"U G\u00fcrsoy","year":"2021","unstructured":"U. G\u00fcrsoy, M. J\u00e4rvinen, G. Nijs and J.F. Pedraza, On the interplay between magnetic field and anisotropy in holographic QCD, JHEP 03 (2021) 180 [arXiv:2011.09474] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR42","doi-asserted-by":"publisher","first-page":"040","DOI":"10.1007\/JHEP01(2017)040","volume":"01","author":"M Baggioli","year":"2017","unstructured":"M. Baggioli and O. Pujolas, On holographic disorder-driven metal-insulator transitions, JHEP 01 (2017) 040 [arXiv:1601.07897] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR43","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.120.171602","volume":"120","author":"L Alberte","year":"2018","unstructured":"L. Alberte et al., Holographic Phonons, Phys. Rev. Lett. 120 (2018) 171602 [arXiv:1711.03100] [INSPIRE].","journal-title":"Phys. Rev. Lett."},{"key":"25876_CR44","doi-asserted-by":"publisher","DOI":"10.1103\/PhysRevLett.94.111601","volume":"94","author":"P Kovtun","year":"2005","unstructured":"P. Kovtun, D.T. Son and A.O. Starinets, Viscosity in strongly interacting quantum field theories from black hole physics, Phys. Rev. Lett. 94 (2005) 111601 [hep-th\/0405231] [INSPIRE].","journal-title":"Phys. Rev. Lett."},{"key":"25876_CR45","doi-asserted-by":"publisher","first-page":"016","DOI":"10.1007\/JHEP07(2023)016","volume":"07","author":"M Baggioli","year":"2023","unstructured":"M. Baggioli et al., Breaking rotations without violating the KSS viscosity bound, JHEP 07 (2023) 016 [arXiv:2304.01807] [INSPIRE].","journal-title":"JHEP"},{"key":"25876_CR46","unstructured":"L. Li, W.-J. Li and X.-M. Kuang, Shear viscoelasticity in anisotropic holographic axion model, arXiv:2410.10161 [INSPIRE]."},{"key":"25876_CR47","doi-asserted-by":"publisher","first-page":"1236","DOI":"10.1140\/epjc\/s10052-024-13600-0","volume":"84","author":"L-Z Xia","year":"2024","unstructured":"L.-Z. Xia and W.-J. Li, Hydrodynamic modes in holographic multiple-axion model, Eur. Phys. J. C 84 (2024) 1236 [arXiv:2405.17092] [INSPIRE].","journal-title":"Eur. Phys. J. C"},{"key":"25876_CR48","doi-asserted-by":"publisher","first-page":"198","DOI":"10.1007\/JHEP05(2024)198","volume":"05","author":"M Baggioli","year":"2024","unstructured":"M. Baggioli, L. Li, W.-J. Li and H.-T. Sun, Mechanical stability of homogeneous holographic solids under finite shear strain, JHEP 05 (2024) 198 [arXiv:2311.16423] [INSPIRE].","journal-title":"JHEP"}],"container-title":["Journal of High Energy Physics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/JHEP04(2025)002.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/JHEP04(2025)002\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/JHEP04(2025)002.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,5,7]],"date-time":"2025-05-07T20:11:16Z","timestamp":1746648676000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/JHEP04(2025)002"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,4,1]]},"references-count":48,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2025,4]]}},"alternative-id":["25876"],"URL":"https:\/\/doi.org\/10.1007\/jhep04(2025)002","relation":{"has-preprint":[{"id-type":"arxiv","id":"2412.08538","asserted-by":"subject"}]},"ISSN":["1029-8479"],"issn-type":[{"type":"electronic","value":"1029-8479"}],"subject":[],"published":{"date-parts":[[2025,4,1]]},"assertion":[{"value":"17 December 2024","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"25 February 2025","order":2,"name":"revised","label":"Revised","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"27 February 2025","order":3,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"1 April 2025","order":4,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"2025 The Author(s)","order":1,"name":"copyright_statement","label":"Copyright Statement","group":{"name":"ArticleCopyright","label":"Copyright Information"}},{"value":"The Author(s)","order":2,"name":"copyright_holder","label":"Copyright Holder","group":{"name":"ArticleCopyright","label":"Copyright Information"}},{"value":"2025","order":3,"name":"copyright_year","label":"Copyright Year","group":{"name":"ArticleCopyright","label":"Copyright Information"}}],"article-number":"2"}}