Research

I am a theoretical physicist, specializing in various aspects of high-energy physics and gravity, at the nexus of scattering amplitudes, quantum field theory, quantum gravity, particle physics, general relativity, and cosmology.

I am currently pursuing my work as a Research Associate at Harvard University.

Prior to Harvard, I was a James Arthur Postdoctoral Fellow at NYU, and was previously a postdoctoral scholar / Fundamental Physics Fellow at KITP and UC Santa Barbara, and a Miller Fellow at UC Berkeley. I received my PhD at the California Institute of Technology as a Hertz Fellow and NSF Graduate Research Fellow, with advisors Clifford Cheung and Sean Carroll.

My papers can be found at:

Publications:

Grant N. Remmen, “Zeta Functions and the Superstring,” arXiv:2606.09977
Gary T. Horowitz, Maciej Kolanowski, Grant N. Remmen, Jorge E. Santos, “Axions Create Singularities on Extremal Horizons,” arXiv:2605.30411
Clifford Cheung, Jaehoon Jeong, Pyungwon Ko, Alex Pomarol, Grant N. Remmen, Francesco Sciotti, “Multipositivity Constrains the Chiral Lagrangian,” arXiv:2605.21582
Francesco Calisto, Clifford Cheung, Grant N. Remmen, Francesco Sciotti, Michele Tarquini, “The Equivalence Principle at High Energies Completes the Spectrum,” arXiv:2605.20319
Francesco Calisto, Clifford Cheung, Grant N. Remmen, Francesco Sciotti, Michele Tarquini, “On the Inverse Problem in Effective Field Theory,” arXiv:2604.15423
Ivano Basile, Grant N. Remmen, Georgina Staudt, “Higher-Spin and Higher-Point Constraints on Stringy Amplitudes,” Phys. Rev. D 114 (2026) 026001, arXiv:2603.04485
Francesco Calisto, Clifford Cheung, Grant N. Remmen, Francesco Sciotti, Michele Tarquini, “Completeness from Gravitational Scattering,” Phys. Rev. D 113 (2026) 106008, arXiv:2512.11955
Clifford Cheung, Grant N. Remmen, Francesco Sciotti, Michele Tarquini, “Strings from Almost Nothing,” Phys. Rev. Lett. 136 (2026) 251601, arXiv:2508.09246
Clifford Cheung, Grant N. Remmen, “Multipositivity Bounds for Scattering Amplitudes,” Phys. Rev. D 112 (2025) 016017, arXiv:2505.05553
Ning Bao, Grant N. Remmen, “Black Hole Complementarity and ER/EPR,” Honorable Mention, 2025 Awards for Essays on Gravitation, Gravity Research Foundation, Int. J. Mod. Phys. D 34 (2025) 2544009, arXiv:2503.16610
Nima Arkani-Hamed, Carolina Figueiredo, Grant N. Remmen, “Open String Amplitudes: Singularities, Asymptotics, and New Representations,” JHEP 4 (2025) 39, arXiv:2412.20639
Avik Banerjee, Achilleas P. Porfyriadis, Grant N. Remmen, “Accidental Symmetry Near Extreme Spinning Black Holes,” JHEP 4 (2025) 149, arXiv:2412.19880
Grant N. Remmen, Nicholas L. Rodd, “Positively Identifying Higgs Effective Field Theory or Standard Model Effective Field Theory,” Phys. Rev. D 113 (2026) 036027, arXiv:2412.07827
Gauthier Durieux, Grant N. Remmen, Nicholas L. Rodd et al. “LHC EFT WG Note: Basis for Anomalous Quartic Gauge Couplings,” SciPost Phys. Comm. Rep. 6 (2025), arXiv:2411.02483
Clifford Cheung, Aaron Hillman, Grant N. Remmen, “Uniqueness Criteria for the Virasoro-Shapiro Amplitude,” Phys. Rev. D 111 (2025) 086034, arXiv:2408.03362
Clifford Cheung, Aaron Hillman, Grant N. Remmen, “A Bootstrap Principle for the Spectrum and Scattering of Strings,” Phys. Rev. Lett. 133 (2024) 251601, arXiv:2406.02665
Gary T. Horowitz, Maciej Kolanowski, Grant N. Remmen, Jorge E. Santos, “Sudden Breakdown of Effective Field Theory Near Cool Kerr-Newman Black Holes,” JHEP 5 (2024) 122, arXiv:2403.00051
Rafael Aoude, Gilly Elor, Grant N. Remmen, Olcyr Sumensari, “Positivity in Amplitudes and Quantum Entanglement,” Fortschr. Phys. 74 (2026) e70113, arXiv:2402.16956
Nima Arkani-Hamed, Clifford Cheung, Carolina Figueiredo, Grant N. Remmen, “Multiparticle Factorization and the Rigidity of String Theory,” Phys. Rev. Lett. 132 (2024) 091601, arXiv:2312.07652
Aidan Chatwin-Davies, Pompey Leung, Grant N. Remmen, “Holographic Screen Sequestration,” Phys. Rev. D 109 (2024) 046003, arXiv:2312.06750
Xi Dong, Grant N. Remmen, Diandian Wang, Wayne W. Weng, Chih-Hung Wu, “Holographic Entanglement from the UV to the IR,” JHEP 11 (2023) 207, arXiv:2308.07952
Clifford Cheung, Grant N. Remmen, “Bespoke Dual Resonance,” Phys. Rev. D 108 (2023) 086009, arXiv:2308.03833
Gary T. Horowitz, Maciej Kolanowski, Grant N. Remmen, Jorge E. Santos, “Extremal Kerr Black Holes as Amplifiers of New Physics,” Phys. Rev. Lett. 131 (2023) 091401, Editors' Suggestion, arXiv:2303.07358
Clifford Cheung, Grant N. Remmen, “Stringy Dynamics from an Amplitudes Bootstrap,” Phys. Rev. D 108 (2023) 026011, arXiv:2302.12263
Achilleas P. Porfyriadis, Grant N. Remmen, “Charged Dilatonic Spacetimes in String Theory,” JHEP 3 (2023) 125, arXiv:2301.08256
Clifford Cheung, Grant N. Remmen, “Veneziano Variations: How Unique are String Amplitudes?,” JHEP 1 (2023) 122, arXiv:2210.12163
Marat Freytsis, Soubhik Kumar, Grant N. Remmen, Nicholas L. Rodd, “Multifield Positivity Bounds for Inflation,” JHEP 9 (2023) 41, arXiv:2210.10791
Juan Maldacena, Grant N. Remmen, “Accumulation-Point Amplitudes in String Theory,” JHEP 8 (2022) 152, arXiv:2207.06426
Grant N. Remmen, Nicholas L. Rodd, “Spinning Sum Rules for the Dimension-Six SMEFT,” JHEP 9 (2022) 30, arXiv:2206.13524
Yu-tin Huang, Grant N. Remmen, “UV-Complete Gravity Amplitudes and the Triple Product,” Phys. Rev. D 106 (2022) L021902, arXiv:2203.00696
Achilleas P. Porfyriadis, Grant N. Remmen, “Large Diffeomorphisms and Accidental Symmetry of the Extremal Horizon,” JHEP 3 (2022) 107, arXiv:2112.13853
Grant N. Remmmen, “Exploration of a Singular Fluid Spacetime,” Gen. Rel. Grav. 53 (2021) 101, arXiv:2111.08713
Nima Arkani-Hamed, Yu-tin Huang, Jin-Yu Liu, Grant N. Remmen, “Causality, Unitarity, and the Weak Gravity Conjecture,” JHEP 3 (2022) 83, arXiv:2109.13937
Grant N. Remmen, “Amplitudes and the Riemann Zeta Function,” Phys. Rev. Lett. 127 (2021) 241602, Editors' Suggestion, arXiv:2108.07820
Achilleas P. Porfyriadis, Grant N. Remmen, “Horizon Acoustics of the GHS Black Hole and the Spectrum of AdS2,” JHEP 10 (2021) 142, arXiv:2106.10282
Ning Bao, Aidan Chatwin-Davies, Grant N. Remmen, “Entanglement Wedge Cross Section Inequalities from Replicated Geometries,” JHEP 7 (2021) 113, arXiv:2106.02640
Ning Bao, Jonathan Harper, Grant N. Remmen, “Holevo Information of Black Hole Mesostates,” Phys. Rev. D 105 (2022) 026010, arXiv:2103.06888
Grant N. Remmen, Nicholas L. Rodd, “Signs, Spin, SMEFT: Sum Rules at Dimension Six,” Phys. Rev. D 105 (2022) 036006, arXiv:2010.04723
Ning Bao, Aidan Chatwin-Davies, Grant N. Remmen, “Warping Wormholes with Dust: a Metric Construction of the Python's Lunch,” JHEP 9 (2020) 102, arXiv:2006.10762
Rafael Aoude et al. (including Grant N. Remmen), “On-Shell Methods for the SMEFT,” Snowmass 2021 Letter of Interest
Grant N. Remmen, Nicholas L. Rodd, “Flavor Constraints from Unitarity and Analyticity,” Phys. Rev. Lett. 125 (2020) 081601, arXiv:2004.02885
Clifford Cheung, Grant N. Remmen, “Entanglement and the Double Copy,” JHEP 5 (2020) 100, arXiv:2002.10470
Ning Bao, Aidan Chatwin-Davies, Jason Pollack, Grant N. Remmen, “Cosmological Decoherence from Thermal Gravitons,” JHEP 8 (2020) 65, arXiv:1911.10207
Grant N. Remmen, Nicholas L. Rodd, “Consistency of the Standard Model Effective Field Theory,” JHEP 12 (2019) 032, arXiv:1908.09845
Ning Bao, Aidan Chatwin-Davies, Jason Pollack, Grant N. Remmen, “Towards a Bit Threads Derivation of Holographic Entanglement of Purification,” JHEP 7 (2019) 152, arXiv:1905.04317
Clifford Cheung, Junyu Liu, Grant N. Remmen, “Entropy Bounds on Effective Field Theory from Rotating Dyonic Black Holes,” Phys. Rev. D 100 (2019) 046003, arXiv:1903.09156
Raphael Bousso, Yasunori Nomura, Grant N. Remmen, “Outer Entropy and Quasilocal Energy,” Phys. Rev. D 99 (2019) 046002, arXiv:1812.06987
Ning Bao, Aidan Chatwin-Davies, Grant N. Remmen, “Entanglement of Purification and Multiboundary Wormhole Geometries,” JHEP 2 (2019) 110, arXiv:1811.01983
Grant N. Remmen, “New Spacetimes for Rotating Dust in (2+1)-Dimensional General Relativity,” Phys. Rev. D 98 (2018) 124008, arXiv:1810.12305
Ning Bao, Aidan Chatwin-Davies, Jason Pollack, Grant N. Remmen, “Traversable Wormholes as Quantum Channels: Exploring CFT Entanglement Structure and Channel Capacity in Holography,” JHEP 11 (2018) 71, arXiv:1808.05963
Yasunori Nomura, Grant N. Remmen, “Area Law Unification and the Holographic Event Horizon,” JHEP 8 (2018) 63, arXiv:1805.09339
Venkatesa Chandrasekaran, Grant N. Remmen, Arvin Shahbazi-Moghaddam, “Higher-Point Positivity,” JHEP 11 (2018) 15, arXiv:1804.03153
Clifford Cheung, Junyu Liu, Grant N. Remmen, “Proof of the Weak Gravity Conjecture from Black Hole Entropy,” JHEP 10 (2018) 4, arXiv:1801.08546
Ning Bao, Sean M. Carroll, Aidan Chatwin-Davies, Jason Pollack, Grant N. Remmen, “Branches of the Black Hole Wave Function Need Not Contain Firewalls,” Phys. Rev. D 97 (2018) 126014, arXiv:1712.04955
Chris Akers, Raphael Bousso, Illan F. Halpern, Grant N. Remmen, “Boundary of the Future of a Surface,” Phys. Rev. D 97 (2018) 024018, arXiv:1711.06689
Clifford Cheung, Grant N. Remmen, Chia-Hsien Shen, Congkao Wen, “Pions as Gluons in Higher Dimensions,” JHEP 4 (2018) 129, arXiv:1709.04932
Clifford Cheung, Grant N. Remmen, “Hidden Simplicity of the Gravity Action,” JHEP 9 (2017) 2, arXiv:1705.00626
Sean M. Carroll, Grant N. Remmen, “A Nonlocal Approach to the Cosmological Constant Problem,” Phys. Rev. D 95 (2017) 123504, arXiv:1703.09715
Ning Bao, Grant N. Remmen, “Bulk Connectedness and Boundary Entanglement,” EPL (Europhysics Letters) 121 (2018) 60007, Editor's Choice, arXiv:1703.00018
Clifford Cheung, Grant N. Remmen, “Twofold Symmetries of the Pure Gravity Action,” JHEP 1 (2017) 104, arXiv:1612.03927
Clifford Cheung, Grant N. Remmen, “Positivity of Curvature-Squared Corrections in Gravity,” Phys. Rev. Lett. 118 (2017) 051601, arXiv:1608.02942
Grant N. Remmen, Ning Bao, Jason Pollack, “Entanglement Conservation, ER=EPR, and a New Classical Area Theorem for Wormholes,” JHEP 7 (2016) 48, arXiv:1604.08217
Sean M. Carroll, Grant N. Remmen, “What is the Entropy in Entropic Gravity?,” Phys. Rev. D 93 (2016) 124052, arXiv:1601.07558
Clifford Cheung, Grant N. Remmen, “Positive Signs in Massive Gravity,” JHEP 4 (2016) 2, arXiv:1601.04068
Ning Bao, Jason Pollack, Grant N. Remmen, “Wormhole and Entanglement (Non-)Detection in the ER=EPR Correspondence,” JHEP 11 (2015) 126, arXiv:1509.05426
Brando Bellazzini, Clifford Cheung, Grant N. Remmen, “Quantum Gravity Constraints from Unitarity and Analyticity,” Phys. Rev. D 93 (2016) 064076, arXiv:1509.00851
Ning Bao, Jason Pollack, Grant N. Remmen, “Splitting Spacetime and Cloning Qubits: Linking No-Go Theorems across the ER=EPR Duality,” Fortschr. Phys. 63 (2015) 705, arXiv:1506.08203
Ning Bao, ChunJun Cao, Sean M. Carroll, Aidan Chatwin-Davies, Nicholas Hunter-Jones, Jason Pollack, Grant N. Remmen, “Consistency Conditions for an AdS Multiscale Entanglement Renormalization Ansatz Correspondence,” Phys. Rev. D 91 (2015) 125036, arXiv:1504.06632
Clifford Cheung, Grant N. Remmen, “Infrared Consistency and the Weak Gravity Conjecture,” JHEP 12 (2014) 87, arXiv:1407.7865
Grant N. Remmen, Sean M. Carroll, “How Many e-Folds Should We Expect from High-Scale Inflation?,” Phys. Rev. D 90 (2014) 063517, arXiv:1405.5538
Clifford Cheung, Grant N. Remmen, “Naturalness and the Weak Gravity Conjecture,” Phys. Rev. Lett. 113 (2014) 051601, arXiv:1402.2287
Grant N. Remmen, Sean M. Carroll, “Attractor Solutions in Scalar-Field Cosmology,” Phys. Rev. D 88 (2013) 083518, arXiv:1309.2611
Grant N. Remmen, Kris Davidson, Andrea Mehner, “Unexpected Ionization Structure in Eta Carinae's ‘Weigelt Knots’,” Astrophys. J. 773 (2013) 27, arXiv:1302.2659
Grant N. Remmen, Kinwah Wu, “Complex Orbital Dynamics of a Double Neutron Star System Revolving around a Massive Black Hole,” Mon. Not. R. Astron. Soc. 430 (2013) 1940, arXiv:1301.2836
Grant Remmen, Elwood McCreary, “Measurement of the Speed and Energy Distribution of Cosmic Ray Muons,” JURP 25 (2012)
Grant Remmen, “A New Assessment of Dark Matter in the Milky Way Galaxy,” JURP 23 (2010)
Grant Newton Remmen, “Defining Gravity: Effective Field Theory, Entanglement, and Cosmology,” 2017, Caltech doctoral thesis, physics. Received American Physical Society J. J. and Noriko Sakurai Dissertation Award in Theoretical Particle Physics.
Grant N. Remmen, “Dynamics of a Rigid Spinning Ring in the Schwarzschild Metric: A Solution to a Gravitational Problem in Mathematical Physics,” 2012, Univ. MN honors thesis, summa cum laude, mathematics
Grant N. Remmen, “Hubble Space Telescope Subpixel Modeling of Anomalous High-Excitation Emission Lines in the Ejecta of Eta Carinae,” 2011, Univ. MN honors thesis, summa cum laude, astrophysics
Grant Remmen, “Distortion of Black Holes caused by Motion relative to the Cosmic Microwave Background,” 2010, Univ. MN honors thesis, summa cum laude, physics