766 citations · 4.1k across the 62 of their papers we have counts for
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Some Hidden Structure in BKL
Malcolm J. Perry
The way spacetime behaves as one approaches a spacelike singularity is re-investigated. We find a simple twistorial presentation that includes and simplifies the classic work of Be…
Singular Supertranslations and Chern-Simons Theory on the Black Hole Horizon
Ratindranath Akhoury, Sangmin Choi, Malcolm J. Perry
We construct the standard and dual supertranslation charges on the future horizon of the Schwarzschild black hole, using the first-order formulation of gravity with the Holst actio…
CFT duals of Kerr-Taub-NUT and beyond
Malcolm J. Perry, Maria J. Rodriguez
The duality relating the four-dimensional Kerr-Taub-NUT black hole to a thermal two-dimensional CFT with central charges is analyzed in detail, generalizing an arg…
Holography from Singular Supertranslations on a Black Hole Horizon
Ratindranath Akhoury, Sangmin Choi, Malcolm J. Perry
We investigate the standard and dual Bondi-Metzner-Sachs (BMS) supertranslation generators on a black hole horizon and draw some conclusions about black hole physics. Recently, it…
Future Boundaries and the Black Hole Information Paradox
Malcolm J. Perry
The black hole information paradox is the incompatibility of quantum mechanics with the semi-classical picture of Hawking radiation. Hawking radiation appears thermal and eventuall…
No Future in Black Holes
Malcolm J. Perry
The black hole information paradox has been with us for some time. We outline the nature of the paradox. We then propose a resolution based on an examination of the properties of q…
Hamiltonian derivation of dual gravitational charges
Hadi Godazgar, Mahdi Godazgar, Malcolm J. Perry
We provide a Hamiltonian derivation of recently discovered dual BMS charges. In order to do so, we work in the first order formalism and add to the usual Palatini action, the Holst…
Central Charges for AdS Black Holes
Malcolm Perry, Maria J. Rodriguez
Nontrivial diffeomorphisms act on the horizon of a generic 4D black holes and create distinguishing features referred to as soft hair. Amongst these are a left-right pair of Viraso…
Asymptotic gravitational charges
Hadi Godazgar, Mahdi Godazgar, Malcolm J. Perry
We present a method for finding, in principle, all asymptotic gravitational charges. The basic idea is that one must consider all possible contributions to the action that do not a…
Quark and lepton mass matrices from localization in M-theory on orbifold
Eric Gonzalez, Gordon Kane, Khoa Dang Nguyen +1
M-theory compactified on a manifold with resolved singularities realizes 4d supersymmetric gauge theories coupled to gravity with three families of St…
Kerr-Newman Black Hole Entropy and Soft Hair
Sasha Haco, Malcolm J. Perry, Andrew Strominger
Recently a set of diffeomorphisms were found which act nontrivially on the Kerr horizon and form a left-right pair of Virasoro algebras. Using the boundary formula for the associat…
Black Hole Entropy and Soft Hair
Sasha Haco, Stephen W. Hawking, Malcolm J. Perry +1
A set of infinitesimal diffeomorphisms are presented which act non-trivially on the horizon of a generic Kerr black hole with spin…
Infrared Divergences in QED, Revisited
Daniel Kapec, Malcolm Perry, Ana-Maria Raclariu +1
Recently it has been shown that the vacuum state in QED is infinitely degenerate. Moreover a transition among the degenerate vacua is induced in any nontrivial scattering process a…
The Conformal BMS Group
Sasha J. Haco, Stephen W. Hawking, Malcolm J. Perry +1
We describe the conformal symmetries of asymptotically flat spacetime. These represent an extension of the BMS group that we call the conformal BMS group. Its general features are…
Superrotation Charge and Supertranslation Hair on Black Holes
Stephen W. Hawking, Malcolm J. Perry, Andrew Strominger
It is shown that black hole spacetimes in classical Einstein gravity are characterized by, in addition to their ADM mass , momentum , angular momentum and boost…
Soft Hair on Black Holes
Stephen W. Hawking, Malcolm J. Perry, Andrew Strominger
It has recently been shown that BMS supertranslation symmetries imply an infinite number of conservation laws for all gravitational theories in asymptotically Minkowskian spacetime…
Localization on the Landscape and Eternal Inflation
Laura Mersini-Houghton, Malcolm J. Perry
We investigate the validity of the assertion that eternal inflation populates the landscape of string theory. We verify that bubble solutions do not satisfy the Klein Gordon equati…
Global aspects of double geometry
David S. Berman, Martin Cederwall, Malcolm J. Perry
We consider the concept of a generalised manifold in the O(d,d) setting, i.e., in double geometry. The conjecture by Hohm and Zwiebach for the form of finite generalised diffeomorp…
The O_{D,D} Geometry of String Theory
David S. Berman, Chris D. A. Blair, Emanuel Malek +1
We construct an action for double field theory using a metric connection that is compatible with both the generalised metric and the O_{D,D} structure. The connection is simultaneo…
E8 duality and dual gravity
Hadi Godazgar, Mahdi Godazgar, Malcolm J. Perry
We construct the non-linear realisation of the E8 motion group and compare this with the bosonic sector of eleven dimensional supergravity. The construction naturally leads to the…
The End of Eternal Inflation
Laura Mersini-Houghton, Malcolm J Perry
We propose a new measure for eternal inflation that includes both conditions, large field fluctuations and smooth homogeneous domains, in the self reproducing probability estimate.…
Duality Invariant Actions and Generalised Geometry
David S. Berman, Hadi Godazgar, Malcolm J. Perry +1
We construct the non-linear realisation of the semi-direct product of E(11) and its first fundamental representation at lowest order and appropriate to spacetime dimensions four to…
The local symmetries of M-theory and their formulation in generalised geometry
David S. Berman, Hadi Godazgar, Mahdi Godazgar +1
In the doubled field theory approach to string theory, the T-duality group is promoted to a manifest symmetry at the expense of replacing ordinary Riemannian geometry with generali…
Boundary Terms in Generalized Geometry and doubled field theory
David S. Berman, Edvard T. Musaev, Malcolm J. Perry
We propose a boundary action to complement the recently developed duality manifest actions in string and M-theory using generalized geometry. This boundary action combines the Gibb…