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Nonresonant optical control of a spinor polariton condensate
(American Physical SocietyPhysical Review B, 2016)
We investigate the spin dynamics of polariton condensates spatially separated from and effectively confined by the pumping exciton reservoir. We obtain a strong correlation between the ellipticity of the non-resonant optical ...
Excited Heavy Mesons From Lattice QCD
(American Institute of Physics PublishingAIP Conference Proceedings, 2016-05-25)
I discuss some recent investigations of excited mesons using first-principles lattice QCD calculations. Over the last few years we have made significant advances in studying near-threshold states, resonances and related ...
Multi-Contrast MRI Reconstruction with Structure-Guided Total Variation
(Society for Industrial and Applied MathematicsSIAM Journal on Imaging Sciences, 2016-08-04)
Magnetic resonance imaging (MRI) is a versatile imaging technique that allows different contrasts depending on the acquisition parameters. Many clinical imaging studies acquire MRI data for more than one of these contrasts—such ...
Numerical simulations of stellar collapse in scalar-tensor theories of gravity
(Institute of PhysicsClassical and Quantum Gravity, 2016-05-31)
We present numerical-relativity simulations of spherically symmetric core collapse and compact-object formation in scalar-tensor theories of gravity. The additional scalar degree of freedom introduces a propagating monopole ...
On turbulence driven by axial precession and tidal evolution of the spin–orbit angle of close-in giant planets
(Oxford University PressMonthly Notices of the Royal Astronomical Society, 2016-05-16)
The spin axis of a rotationally deformed planet is forced to precess about its orbital angular momentum vector, due to the tidal gravity of its host star, if these directions are misaligned. This induces internal fluid ...
The geometry and representation theory of superconformal quantum mechanics
(University of CambridgeDepartment of Applied Mathematics and Theoretical PhysicsJesus College, 2016-06-28)
We study aspects of the quantum mechanics of nonlinear $\sigma$-models with superconformal invariance. The connection between the differential geometry of the target manifold and symmetries of the quantum mechanics is ...
Second-Order Asymptotics of Visible Mixed Quantum Source Coding via Universal Codes
(IEEEIEEE Transactions on Information Theory, 2016-05-23)
The simplest example of a quantum information source with memory is a mixed source, which emits signals entirely from one of two memoryless quantum sources with given $\textit{a priori}$ probabilities. Considering a mixed ...
Unsteady flow and particle migration in dense, non-Brownian suspensions
(AIPJournal of Rheology, 2016)
We present experimental results on dense corn-starch suspensions as examples of non-Brownian, nearly-hard particles that undergo continuous and discontinuous shear thickening (CST and DST) at intermediate and high densities ...
An a$_{0}$ resonance in strongly coupled πη, K$\bar K$ scattering from lattice QCD
(American Physical SocietyPhysical Review D, 2016-05-11)
We present the first calculation of coupled-channel meson-meson scattering in the isospin =1, G-parity negative sector, with channels πη, K$\bar K$ and πη′, in a first-principles approach to QCD. From the discrete spectrum ...
Turning on gravity with the Higgs mechanism
(IOP PublishingClassical and Quantum Gravity, 2016-06-21)
We investigate how a Higgs mechanism could be responsible for the
emergence of gravity in extensions of Einstein theory, with a suitable low energy limit.
In this scenario, at high energies, symmetry restoration could "turn ...