Raghu Mahajan
Sr Res Scientist-Physical, Physics
Honors & Awards
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Stanford Graduate Fellowship, Stanford University (2012)
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Tyson Medal, University of Cambridge (2012)
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Gates Cambridge Scholarship, Bill and Melinda Gates Foundation (2011)
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Joel Matthew Orloff Award for Scholarship, Massachusetts Institute of Technology (2011)
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Aditya Birla Scholarship, Aditya Birla Group (2006)
Professional Education
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SB, Massachusetts Institute of Technology, Physics and Mathematics (2011)
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MASt, University of Cambridge, Theoretical Physics (2012)
Current Research and Scholarly Interests
My research interests are wide-ranging:
1) In the context of gravity, how does spacetime emerge from its dual quantum system? How does the dual quantum system encode the answers to questions that involve local physics in semi-classical gravity? How do you avoid the "firewall" paradox in the context of black-hole evaporation?
2) How do you calculate electrical and heat currents in strongly-coupled many-body systems? How do you explain the linear-in-temperature resistivity in high-temperature cuprates?
3) Use tensor network methods to study electrical and heat transport and also the real-time dynamics of systems out of thermal equilibrium.
All Publications
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The ZZ annulus one-point function in non-critical string theory: A string field theory analysis
JOURNAL OF HIGH ENERGY PHYSICS
2022
View details for DOI 10.1007/JHEP12(2022)151
View details for Web of Science ID 000928224600007
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Multi-instantons in minimal string theory and in matrix integrals
JOURNAL OF HIGH ENERGY PHYSICS
2022
View details for DOI 10.1007/JHEP10(2022)065
View details for Web of Science ID 000866130300008
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Normalization of ZZ instanton amplitudes in minimal string theory
JOURNAL OF HIGH ENERGY PHYSICS
2022
View details for DOI 10.1007/JHEP07(2022)139
View details for Web of Science ID 000831256400008
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Sphere and disk partition functions in Liouville and in matrix integrals
JOURNAL OF HIGH ENERGY PHYSICS
2022
View details for DOI 10.1007/JHEP07(2022)132
View details for Web of Science ID 000829159200008
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The double cone geometry is stable to brane nucleation
JOURNAL OF HIGH ENERGY PHYSICS
2021
View details for DOI 10.1007/JHEP09(2021)156
View details for Web of Science ID 000698952200006
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Free fermion entanglement with a semitransparent interface: he effect of graybody factors on entanglement islands
SCIPOST PHYSICS
2021; 11 (3)
View details for DOI 10.21468/SciPostPhys.11.3.063
View details for Web of Science ID 000708668200015
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Comments on the quantum field theory of the Coulomb gas formalism
JOURNAL OF HIGH ENERGY PHYSICS
2021
View details for DOI 10.1007/JHEP04(2021)136
View details for Web of Science ID 000641468700001
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Recent Progress on the Black Hole Information Paradox Computation of the Page Curve
RESONANCE-JOURNAL OF SCIENCE EDUCATION
2021; 26 (1): 33–46
View details for DOI 10.1007/s12045-020-1103-y
View details for Web of Science ID 000614422400003
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Density matrices in quantum gravity
SCIPOST PHYSICS
2020; 9 (4)
View details for DOI 10.21468/SciPostPhys.9.4.045
View details for Web of Science ID 000580923700003
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Matrix ensembles with global symmetries and 't Hooft anomalies from 2d gauge theory
JOURNAL OF HIGH ENERGY PHYSICS
2020
View details for DOI 10.1007/JHEP04(2020)186
View details for Web of Science ID 000531394500002
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Upper Bound on Diffusivity.
Physical review letters
2017; 119 (14): 141601
Abstract
The linear growth of operators in local quantum systems leads to an effective light cone even if the system is nonrelativistic. We show that the consistency of diffusive transport with this light cone places an upper bound on the diffusivity: D≲v^{2}τ_{eq}. The operator growth velocity v defines the light cone, and τ_{eq} is the local equilibration time scale, beyond which the dynamics of conserved densities is diffusive. We verify that the bound is obeyed in various weakly and strongly interacting theories. In holographic models, this bound establishes a relation between the hydrodynamic and leading nonhydrodynamic quasinormal modes of planar black holes. Our bound relates transport data-including the electrical resistivity and the shear viscosity-to the local equilibration time, even in the absence of a quasiparticle description. In this way, the bound sheds light on the observed T-linear resistivity of many unconventional metals, the shear viscosity of the quark-gluon plasma, and the spin transport of unitary fermions.
View details for DOI 10.1103/PhysRevLett.119.141601
View details for PubMedID 29053285
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Late-time structure of the Bunch-Davies FRW wavefunction
JOURNAL OF HIGH ENERGY PHYSICS
2016
View details for DOI 10.1007/JHEP10(2016)103
View details for Web of Science ID 000386752000002
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Transport in Chern-Simons-matter theories
JOURNAL OF HIGH ENERGY PHYSICS
2016
View details for DOI 10.1007/JHEP07(2016)090
View details for Web of Science ID 000380255700003
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Connecting entanglement in time and space: Improving the folding algorithm
PHYSICAL REVIEW A
2015; 91 (3)
View details for DOI 10.1103/PhysRevA.91.032306
View details for Web of Science ID 000351340100002
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Holographic mutual information and distinguishability of Wilson loop and defect operators
JOURNAL OF HIGH ENERGY PHYSICS
2015
View details for DOI 10.1007/JHEP02(2015)100
View details for Web of Science ID 000349830900002
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Chern-Simons-Ghost theories and De Sitter space
JOURNAL OF HIGH ENERGY PHYSICS
2015
View details for DOI 10.1007/JHFP01(2015)074
View details for Web of Science ID 000349610600001
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Transport near the Ising-nematic quantum critical point of metals in two dimensions
PHYSICAL REVIEW B
2014; 89 (15)
View details for DOI 10.1103/PhysRevB.89.155130
View details for Web of Science ID 000335320200001
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Quantum critical metals in d=3+1 dimensions
PHYSICAL REVIEW B
2013; 88 (11)
View details for DOI 10.1103/PhysRevB.88.115116
View details for Web of Science ID 000324230700002
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Non-Fermi liquids and the Wiedemann-Franz law
PHYSICAL REVIEW B
2013; 88 (12)
View details for DOI 10.1103/PhysRevB.88.125107
View details for Web of Science ID 000324051700004