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Stability of fluid-loaded structures
(University of CambridgeSt John's College, 2011-06-07)
It is known theoretically that infinitely long fluid loaded plates in mean flow exhibit a range of unusual phenomena in the 'long time' limit. These include convective
instability, absolute instability and negative energy ...
Anti-self-dual fields and manifolds
(University of CambridgeDepartment of Applied Mathematics and Theoretical Physics, 2013-04-30)
In this thesis we study anti–self–duality equations in four and eight dimensions on manifolds of special Riemannian holonomy, among these hyper–Kähler,
Quaternion–Kähler and Spin(7)–manifolds.
We first consider the ...
Freeze fracturing of elastic porous media
(University of CambridgeDepartment of Applied Mathematics and Theoretical PhysicsInstitute of Theoretical Geophysics, 2012-06-12)
The physical motivation behind this thesis is the phenomenon of fracturing of rocks and other porous media due to ice growth inside pre-existing faults and large pores. My aim is to explain the basic physical processes ...
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, ...
The convective desalination of sea ice
(University of CambridgeDepartment of Applied Mathematics and Theoretical Physics, 2014-07-01)
This thesis aims to improve our understanding of the fundamental processes affecting the growth of sea ice in the polar oceans in order to improve climate models. Newly formed sea ice contains a significant amount of salt ...
Multiple solutions in supersymmetry and the Higgs
(The Royal Society PublishingPhilosophical Transactions of the Royal Society A, 2014-11-24)
Weak-scale supersymmetry is a well-motivated, if speculative, theory beyond the Standard Model of particle physics. It solves the thorny issue of the Higgs mass, namely: how can it be stable to quantum corrections, when ...
Limits on a Gravitational Field Dependence of the Proton{Electron Mass Ratio from H2 in White Dwarf Stars
(American Physical SocietyPhysical Review Letters, 2014-09-18)
Spectra of molecular hydrogen (H2) are employed to search for a possible proton-to-electron
mass ratio (μ) dependence on gravity. The Lyman transitions of H2, observed with the Hubble
Space Telescope towards white dwarf ...
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 ...