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An outstanding open issue in our quest for physics beyond Einstein is the unification of general relativity (GR) and quantum physics.
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Ashtekar, A Baez, J Corichi A and Krasnov K 1998 Quantum geometry and black hole entropy (1998) Phys. Rev. Lett
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Bojowald M 2001 Absence of singularity in loop quantum cosmology Phys. Rev. Lett
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Eichhorn, A 2020 Asymptotically safe gravity, arXiv:2003.00044
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Ashtekar, A and Lewandowski, J 2004 Background independent quantum gravity: A status report
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Ashtekar A and Bojowald M 2005 Black hole evaporation: A New Paradigm Class. Quant. Grav
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Lewandowski, L Okolow, A Sahlmann, H and Thiemann, T 2006 Uniqueness of diffeomorphism invariant states on holonomy flux algebras, Comm. Math. Phys
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Ashtekar, A and Campiglia M 2012 On the uniqueness of kinematics of loop quantum cosmology, Class. Quant. Grav
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Hall, B C 2013 Quantum Theory for Mathematicians , Graduate Texts in Mathematics, 267
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Zhang, X Ma, Y and Artymowski, M 2013 Loop quantum Brans-Dicke cosmology Phys. Rev
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Rovelli, C 2006 Graviton propagator from background-independent quantum gravity, Phys. Rev. Lett
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Bianchi, E, Modesto, L, Rovelli, C and Speziale, S 2006 Graviton propagator in loop quantum gravity, Class. Quant. Grav
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Ashtekar, A Pawlowski, T and Singh P 2006 Quantum nature of the big bang, Phys. Rev. Lett
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Bianchi, E and Myers, R C 2014 On the Architecture of Spacetime Geometry,” Class. Quant. Grav. 31
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Cole, K.C. 2016 The Strange Second Life of String Theory, Institute for Advanced Study News, https://www.ias.edu/news/cole-stringtheory-quanta
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Schwarz, D J Copi, C J Huterer, D and Starkman G D 2016 CMB anomalies after Planck Class. Quant. Grav
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