Last update April, 2025
Preprints
[1] E. Bianchi, A. Gupta, H. M. Haggard, and B. S. Sathyaprakash, Small Spins of Primordial Black Holes from Random Geometries: Bekenstein-Hawking Entropy and Gravitational Wave Observations, arxiv:1812.05127 2020
Publications
[36] S. P. Donà, H. M. Haggard, C. Rovelli, and F. Vidotto, Tunneling of quantum geometries in spinfoams, Phys. Rev. D 109 (106016), 2024
[35] H. M. Haggard, J. Lewandowski, and H. Sahlmann, Emergence of Riemannian Quantum Geometry is a chapter in the "Handbook of Quantum Gravity", edited by Cosimo Bambi, Leonardo Modesto and Ilya Shapiro, Springer, 2023
[34] S. M. Bruna, N. B.&nbps;Cowan, J. Sheffler, H. M. Haggard, A. Bourdon, and M. Mâlin, Combining photometry and astrometry to improve orbit retrieval of directly imaged exoplanets, MNRAS 519 (460), 2022
[33] S. K. Asante, B.&nbps;Dittrich, and H. M. Haggard, Discrete gravity dynamics from effective spin foams, Class. Quantum Grav. 38 (145023), 2021
[32] S. K. Asante, B.&nbps;Dittrich, and H. M. Haggard, Effective Spin Foam Models for Four-Dimensional Quantum Gravity, Phys. Rev. Lett. 125 (231301), 2020
[31] S. K. Asante, B.&nbps;Dittrich, and H. M. Haggard, Holographic description of boundary gravitons in (3+1) dimensions, JHEP 2019 (144), 2019
[30] H. M. Haggard, M. Han, W. Kamiński and A. Riello, SL(2,C) Chern-Simons Theory, Flat Connections, and Four-dimensional Quantum Geometry, Adv. Theor. Math. Phys. 23 (1067), 2019
[29] E. Bianchi and H. M. Haggard, Spin fluctuations and black hole singularities: the onset of quantum gravity is spacelike, New J. Phys. 20 (103028), 2018
[28] B. Farr, W. M. Farr, N. B. Cowan, H. M. Haggard, and T. Robinson, exocartographer: A Bayesian Framework for Mapping Exoplanets in Reflected Light, AJ 156 (146), 2018
[27] E. Bianchi, M. Christodoulou, F. D’Ambrosio, H. M. Haggard, and C. Rovelli, White Holes as Remnants: A Surprising Scenario for the End of a Black Hole, Class. Quantum Grav. 35 (22500), 2018
[26] S. K. Asante, B. Dittrich, and H. M. Haggard, The Degrees of Freedom of Area Regge Calculus: Dynamics, Non-metricity, and Broken Diffeomorphisms, Class. Quant. Grav. 35 (135009), 2018 [featured on CQGPlus due to high quality referee rating]
[25] H. M. Haggard and N. B. Cowan, Analytic Reflected Lightcurves for Exoplanets, MNRAS 478 (371) 2018
[24] E. Bianchi, H. M. Haggard, and C. Rovelli The boundary is mixed, Gen. Relativ. Gravit. 49 (100) 2017
[23] N. B. Cowan, V. Chayes, É. Bouffard, M. Meynig, and H. M. Haggard, Odd Harmonics in Exoplanet Photometry: Weather or Artifact?, MNRAS 467 (747) 2017
[22] H. M. Haggard, and C. Rovelli, Quantum Gravity Effects around Sagittarius A*, IJMPD 25 (1644021), 2016 [selected for honorable mention in the Gravity Research Foundation's essay contest]
[21] J. C. Schwartz, C. Sekowski, H. M. Haggard, E Pallé and N. B. Cowan Inferring Planetary Obliquity Using Rotational & Orbital Photometry, MNRAS 457 (926), 2016
[20] H. M. Haggard, M. Han, W. Kamiński and A. Riello Four-dimensional quantum gravity with a cosmological constant from three-dimensional holomorphic blocks, Physics Letters B 752 (258), 2016
[19] H. M. Haggard, M. Han, and A. Riello Encoding Curved Tetrahedra in Face Holonomies: a Phase Space of Shapes from Group-Valued Moment Maps, Annales Henri Poincaré 17 (2001), 2016
[18] H. M. Haggard and C. Rovelli Black to white hole tunneling: An exact classical solution, IJMPA 30 (1545015), 2015
[17] H. M. Haggard, M. Han, W. Kamiński and A. Riello SL(2,C) Chern-Simons Theory, a non-Planar Graph Operator, and 4D Loop Quantum Gravity with a Cosmological Constant: Semiclassical Geometry, Nuclear Physics B 900 (1), 2015
[16] H. M. Haggard, A. Hedeman, E. Kur and R. G. Littlejohn Symplectic and Semiclassical aspects of the Schläfli Identity, Journal of Physics A: Mathematical and Theoretical 48 (105203), 2015
[15] H. M. Haggard and C. Rovelli Quantum-gravity effects outside the horizon spark black to white hole tunneling, Physical Review D 92 (104020), 2015
[14] I. Esterlis, H. M. Haggard, A. Hedeman, and R. G. Littlejohn Maslov indices, Poisson brackets, and singular differential forms, Europhysics letters 106 (50002), 2014
[13] G. Chirco, H. M. Haggard, A. Riello, and C. Rovelli Spacetime thermodynamics without hidden degrees of freedom, Physical Review D 90 (044044), 2014
[12] G. Chirco, H. M. Haggard, and C. Rovelli Coupling and thermal equilibrium in general-covariant systems, Physical Review D 88 (084027), 2013
[11] H. M. Haggard, and C. Rovelli, Essay on gravitation: Death and resurrection of the zeroth principle of thermodynamics, IJMPD 22 (1342007), 2013 [selected for honorable mention in the Gravity Research Foundation's essay contest]
[10] N. B. Cowan, P. A. Fuentes, and H. M. Haggard Lightcurves of Stars & Exoplanets: Estimating Inclination, Obliquity, and Albedo, MNRAS 434 (2465), 2013
[9] H. M. Haggard and C. Rovelli Death and resurrection of the zeroth principle of thermodynamics, Physical Review D 87 (084001), 2013
[8] H. M. Haggard Pentahedral volume, chaos, and quantum gravity, Physical Review D 87 (044020), 2013
[7] H. M. Haggard, C. Rovelli, F. Vidotto, and W. Wieland The spin connection of twisted geometry, Physical Review D 87 (024038), 2013
[6] E. Bianchi and H. M. Haggard, Bohr-Sommerfeld quantization of space, Physical Review D 86 (124010), 2012
[5] V. Aquilanti, H. M. Haggard, A. Hedeman, N. Jeevanjee, R. G. Littlejohn and L. Yu, Semiclassical Mechanics of the Wigner 6j-symbol, Journal of Physics A: Mathematical and Theoretical 45 (065209), 2012
[4] H. M. Haggard, Asymptotic Analysis of Spin Networks with Applications to Quantum Gravity, Ph.D. dissertation, University of California, Berkeley, 2011
[3] E. Bianchi and H. M. Haggard, Discreteness of the Volume of Space from Bohr-Sommerfeld Quantization, Physical Review Letters 107 (011301), 2011
[2] H. M. Haggard and R. G. Littlejohn, Asymptotics of the Wigner 9j-symbol, Classical and Quantum Gravity 27 (135010), 2010
[1] V. Aquilanti, H. M. Haggard, R. G. Littlejohn and L. Yu, Semiclassical Analysis of Wigner 3j-symbol, Journal of Physics A: Mathematical and Theoretical 40 (5637), 2007
University of Connecticut, PAN Seminar, Apr 2025: slides
Louisiana State University Colloquium, Mar 2025: slides
Laboratoire de Physique, ENS de Lyon, Quantum Gravity Seminar, Jul 2024: slides
Bard Physics Friday Seminar, Feb 2020: slides
Dean's Lecture at St. John's College, Oct 2019: slides
Bard Science on the Edge Seminar, Apr 2019: slides
International loop quantum gravity seminar, Nov 2016: slides
Invited Plenary, Loops '15 Jul 2015: slides
Parallel Session, Loops '15 Jul 2015: slides
Quantum Gravity Seminar, Nottingham University, Jun 2015: slides
General Relativity and Gravitation: a Centennial Perspective, Penn State University, Jun 2015: slides
APS April Meeting, Apr 2015: slides
International loop quantum gravity seminar, Nov 2014: slides, audio (.wav) [audio hosted at: relativity.phys.lsu.edu/ilqgs/]
APS Mid-Atlantic Meeting, Oct 2014: slides
Invited colloquium, Amherst College Sep 2014: slides
UC Berkeley, String Group Meeting, Aug 2014: black board talk
Frontiers of Fundamental Physics, July 2014: slides
Invited speaker, Chair of General Relativity and Exact Results in QFT
and Gravity Seminars, Univ of Warsaw, May 2014.
Invited speaker, Condensed Matter Theory Seminar, University of Regensburg, Feb 2014: slides
Second EFI winter conference on Quantum Gravity, Feb 2014: slides
Invited speaker, Perimeter Institute quantum gravity seminar, Nov 2013: slides
High energy physics seminar, Nijmegen, Oct 2013: slides
International loop quantum gravity seminar, Sep 2013: slides, audio (.wav, .aif) [audio hosted at: relativity.phys.lsu.edu/ilqgs/]
Loops '13, Jul 2013: video, slides
Invited speaker, Relativistic Quantum Information – North, Jun 2013: slides (workshop website)
Quantum Fields, Gravity & Information, Apr 2013: slides (co-won best talk at QFGI 2013 meeting)
International loop quantum gravity seminar, Feb 2013: slides, audio (.wav, .aif) [audio hosted at: relativity.phys.lsu.edu/ilqgs/]
Perimeter Institute quantum gravity seminar, May 2012: video, slides
Short talk at ``Symmetries of Differential Equations: Frames, Invariants and Applications," a conference to celebrate Peter Olver's 60th birthday: slides
Recent Talks