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Quantum theory from the perspective of general probabilistic theories
(University of CambridgeDepartment of Applied Mathematics and Theoretical Physics, 2015-03-03)
This thesis explores various perspectives on quantum phenomena, and how our understanding of these phenomena is informed by the study of general probabilistic theories. Particular attention is given to quantum nonlocality, ...
Jordan-Wigner formalism for arbitrary 2-input 2-output matchgates and their classical simulation
(Rinton PressQuantum Information and Computation, 2015-05-01)
In Valiant's matchgate theory, 2-input 2-output matchgates are 4 4 matrices that
satisfy ten so-called matchgate identities. We prove that the set of all such matchgates
(including non-unitary and non-invertible ones) ...
Explaining the CMS eejj Excess With R−parity Violating Supersymmetry and Implications for Neutrinoless Double Beta Decay
(American Physical SocietyPhysical Review D, 2015-01-28)
The recent CMS searches for the right handed gauge boson WR reports an interesting deviation
from the Standard Model. The search has been conducted in the eejj channel and has shown
an excess around meejj ~ 2 TeV. In this ...
Resonant slepton production yields CMS eejj and epTjj excesses
(APS, 2015-01-13)
Recent CMS searches for dileptoquark production report local excesses of 2.4σ in an eejj channel and 2.6σ in an epTjj channel. Here, we simultaneously explain both excesses with resonant slepton production in R-parity ...
Plethora of transitions during breakup of liquid filaments
(PNASProceedings of the National Academy of Sciences, 2015-03-30)
Thinning and breakup of liquid filaments are central to dripping of leaky faucets, inkjet drop formation, and raindrop fragmentation. As the filament radius decreases, curvature and capillary pressure, both inversely ...
Lubricated viscous gravity currents
(CUPJournal of Fluid Mechanics, 2015-02-10)
We present a theoretical and experimental study of viscous gravity currents lubricated by another viscous fluid from below. We use lubrication theory to model both layers as Newtonian fluids spreading under their own weight ...
Early-time free-surface flow driven by a deforming boundary
(Cambridge University PressJournal of Fluid Mechanics, 2015-02-24)
When a solid boundary deforms rapidly into a quiescent liquid layer, a flow is in-
duced that can lead to jet formation. An asymptotic analytical solution is presented
for this flow, driven by a solid boundary deforming ...
Constrained dynamics and higher derivative systems in modified gravity
(University of CambridgeDepartment of Applied Mathematics and Theoretical Physics, 2015-06-09)
In this thesis, higher derivative theories and constrained dynamics are investigated in detail. In the first part of the thesis, we discuss how the Ostrogradski instability emerges in non-degenerate higher derivative ...
Accelerated Gravitational Wave Parameter Estimation with Reduced Order Modeling
(APSPhysical Review Letters, 2015-02-20)
Inferring the astrophysical parameters of coalescing compact binaries is a key science goal of the upcoming advanced LIGO-Virgo gravitational-wave detector network and, more generally, gravitational-wave astronomy. However, ...
On High-Frequency Sound Generated by Gust-Aerofoil Interaction in Shear Flow
(CUPJournal of Fluid Mechanics, 2015-02-04)
A theoretical model is constructed to predict the far-field sound generated by
high-frequency gust–aerofoil interaction in steady parallel shear flow, including the
effects of aerofoil thickness. Our approach is to use ...