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Non-trivial Phase Coupling in Polariton Multiplets
(American Physical SocietyPhysical Review X, 2016)
We investigate the phase coupling between spatially separated polariton condensates under non-resonant optical pulsed excitation. In the simple case of two condensates, we observe phase locking either in symmetric or ...
Instabilities and Solitons in Minimal Strips
(American Physical SocietyPhysical Review Letters, 2016-07-01)
We show that highly twisted minimal strips can undergo a nonsingular transition, unlike the singular transitions seen in the Möbius strip and the catenoid. If the strip is nonorientable, this transition is topologically ...
Black Hole Kicks as New Gravitational Wave Observables
(American Physical SocietyPhysical Review Letters, 2016-06-29)
Generic black hole binaries radiate gravitational waves anisotropically, imparting a recoil, or kick, velocity to the merger remnant. If a component of the kick along the line of sight is present, gravitational waves emitted ...
Higher symmetries of the Schrödinger operator in Newton–Cartan geometry
(ElsevierJournal of Geometry and Physics, 2016-06-17)
We establish several relationships between the non-relativistic conformal symmetries of Newton–Cartan geometry and the Schrödinger equation. In particular we discuss the algebra sch(d) of vector fields conformally-preserving ...
Preconditioned ADMM with nonlinear operator constraint
(SpringerIFIP Advances in Information and Communication Technology, 2016)
We are presenting a modification of the well-known Alternating Direction Method of Multipliers (ADMM) algorithm with additional preconditioning that aims at solving convex optimisation problems with nonlinear operator ...
Micro-Tug-of-War: A Selective Control Mechanism for Magnetic Swimmers
(American Physical SocietyPhysical Review Applied, 2016-06-30)
One of the aspirations for artificial microswimmers is their application in noninvasive medicine. For any practical use, adequate mechanisms enabling control of multiple artificial swimmers will be of paramount importance. ...
Spectral study of the Laplace-Beltrami operator arising in the problem of acoustic wave scattering by a quarter-plane
(Oxford University PressQuarterly Journal of Mechanics and Applied Mathematics, 2016)
The Laplace-Beltrami operator on a sphere with a cut arises when considering
the problem of wave scattering by a quarter-plane. Recent methods developed
for sound-soft (Dirichlet) and sound-hard (Neumann) quarter-planes ...
Flagellar flows around bacterial swarms
(American Physical SocietyPhysical Review Fluids, 2016)
Flagellated bacteria on nutrient-rich substrates can differentiate into a swarming state and move in dense swarms across surfaces. A recent experiment measured the flow in the fluid around an Escherichia coli swarm (Wu, ...
Phoretic flow induced by asymmetric confinement
(Cambridge University PressJournal of Fluid Mechanics, 2016-07-25)
Internal phoretic flows due to the interactions of solid boundaries with local chemical gradients may be created using chemical patterning. Alternatively, we demonstrate here that internal flows might also be induced by ...
Higher spins from Nambu-Chern-Simons theory
(SpringerCommunications in Mathematical Physics, 2016)
We propose a new theory of higher spin gravity in three spacetime dimensions. This is defined by what we will call a Nambu-Chern-Simons (NCS) action; this is to a Nambu 3-algebra as an ordinary Chern-Simons (CS) action is ...