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Non-relativistic twistor theory and Newton-Cartan geometry
(SpringerCommunications in Mathematical Physics, 2016-01-14)
We develop a non-relativistic twistor theory, in which Newton-Cartan structures of Newtonian gravity correspond to complex three-manifolds with a four-parameter family of rational curves with normal bundle O ⊕ O(2). We ...
Quantum Conditional Mutual Information, Reconstructed States, and State Redistribution
(APSPhysical Review Letters, 2015-06-29)
We give two strengthenings of an inequality for the quantum conditional mutual information of a tripartite quantum state recently proved by Fawzi and Renner, connecting it with the ability to reconstruct the state from its ...
On the Einstein-Weyl and conformal self-duality equations
(AIP PublishingJournal of Mathematical Physics, 2015-08-03)
The equations governing anti-self-dual and Einstein-Weyl conformal geometries
can be regarded as ‘master dispersionless systems’ in four and three dimensions
respectively. Their integrability by twistor methods has been ...
Superadditivity of private information for any number of uses of the channel
(APSPhysical Review Letters, 2015-07-20)
The quantum capacity of a quantum channel is always smaller than the capacity of the channel for private communication. Both quantities are given by the infinite regularization of the coherent and the private information, ...
Dynamical analysis in scalar field cosmology
(APSPhysical Review D, 2015-06-23)
We give a general method to find exact cosmological solutions for scalar-field dark energy in the presence of perfect fluids. We use the existence of invariant transformations for the Wheeler De Witt (WdW) equation. We ...
Local varying-alpha theories
(World Scientific PublishingModern Physics Letters A, 2015-07-20)
In a recent paper, we demonstrated how the simplest model for varying-alpha may be interpreted as the effect of a dielectric material, generalized to be consistent with Lorentz invariance. Unlike normal dielectrics, such ...
Multi-timescale analysis of phase transitions in precessing black-hole binaries
(American Physical SocietyPhysical Review D, 2015)
The dynamics of precessing binary black holes (BBHs) in the post-Newtonian regime has a strong timescale hierarchy: the orbital timescale is very short compared to the spin-precession timescale which, in turn, is much ...
Hyperbolic Inflation in the Light of Planck 2015 data
(APSPhysical Review D, 2015-05-18)
Rubano and Barrow have discussed the emergence of a dark energy, with late-time cosmic acceleration arising from a self-interacting homogeneous scalar field with a potential of hyperbolic power type. Here, we study the ...
Interpreting the CMS l+l-jj missing ET Excess with a Leptoquark Model
(APSPhysical Review D, 2015-06-29)
We present a model of leptoquarks (LQs) with a significant partial branching ratio into an extra sector, taken to be a viable dark matter candidate, other than the canonical lepton and jets final state. For LQs with mass ...