Conditional phase shifts using trapped atoms

We describe a scheme for producing conditional nonlinear phase shifts on two-photon optical fields using an interaction with one or more ancilla two-level atomic systems. The conditional field state transformations are induced by using high efficiency fluorescence shelving measurements on the atomic ancilla. The scheme can be nearly deterministic and is of obvious benefit for quantum information applications

A study of reactive plasma deposited thin films

A state-of-the-art research laboratory was established to grow and characterize amorphous thin films that are useful in semi-conductor devices. Two film systems, nitride films and silicon dioxide films were studied. Over seventy deposition runs for nitride films were made. The films were deposited on silicon substrate using plasma enhanced chemical vapor deposition. It was found that the uniformity of the films were affected by the location of the film on the platen

Research on computational and display requirements for human control of space vehicle boosters. Part 1 - Theory and results Final report, 22 Jun. - 22 Oct. 1966

Computational and display requirements for man-computer guidance and control techniques for reusable manned spacecraf

Generating optical nonlinearity using trapped atoms

We describe a scheme for producing an optical nonlinearity using an interaction with one or more ancilla two-level atomic systems. The nonlinearity, which can be implemented using high efficiency fluorescence shelving measurements, together with general linear transformations is sufficient for simulating arbitrary Hamiltonian evolution on a Fock state qudit. We give two examples of the application of this nonlinearity, one for the creation of nonlinear phase shifts on optical fields as required in single photon quantum computation schemes, and the other for the preparation of optical Schrodinger cat states.Comment: Substantially extended from quant-ph/020815

The unsteady flow of a weakly compressible fluid in a thin porous layer. I: Two-dimensional theory

We consider the problem of determining the pressure and velocity fields for a weakly compressible fluid flowing in a two-dimensional reservoir in an inhomogeneous, anisotropic porous medium, with vertical side walls and variable upper and lower boundaries, in the presence of vertical wells injecting or extracting fluid. Numerical solution of this problem may be expensive, particularly in the case that the depth scale of the layer h is small compared to the horizontal length scale l. This is a situation which occurs frequently in the application to oil reservoir recovery. Under the assumption that epsilon=h/l<<1, we show that the pressure field varies only in the horizontal direction away from the wells (the outer region). We construct two-term asymptotic expansions in epsilon in both the inner (near the wells) and outer regions and use the asymptotic matching principle to derive analytical expressions for all significant process quantities. This approach, via the method of matched asymptotic expansions, takes advantage of the small aspect ratio of the reservoir, epsilon, at precisely the stage where full numerical computations become stiff, and also reveals the detailed structure of the dynamics of the flow, both in the neighborhood of wells and away from wells

Research on computational and display requirements for human control of space vehicle boosters. Part I - Theory and results Final report, 1 Mar. - 31 Aug. 1967

Optimization study of computation and display requirements for human control of reusable orbital transport ascen

Efficient Parity Encoded Optical Quantum Computing

We present a linear optics quantum computation scheme with a greatly reduced cost in resources compared to KLM. The scheme makes use of elements from cluster state computation and achieves comparable resource usage to those schemes while retaining the circuit based approach of KLM

Antipodean Owenite or Colonial Socialist: Charles Harper’s Economic Thought

Agricultural co-operation has long been recognised as an important institution in the development of Western Australia’s agricultural sector. Charles Harper (1842 – 1912) has long been considered the founding father of agricultural co-operation in Western Australia. Harper was instrumental in founding the Western Australian Co-operative Producers’ Union in 1902 which, among other things, eventually became Wesfarmers Ltd. Harper was also a long standing member of Parliament, a newspaperman, an explorer, a founder of schools, a philanthropist, and an agricultural experimentalist. He was also able to pass his legacy on to his son Walter who led the co-operative movement after Harper senior’s death in 1912 and saw to its integration into the mainstream of Western Australian political and economic systems. In considering Harper’s contribution to the economic and social development of Western Australia, it is difficult to determine the extent to which his economic thinking in relation to co-operation or other economic questions conformed to such socialistic ideas represented by Owenite Co-operation or Colonial Socialism. Harper was neither a protectionist nor a free trader. Indeed, in this paper, I will discuss Harper’s position in relation to a number of economic questions – tariffs, dumping, fair trade, land alienation - with a view to showing that Harper was a pragmatist focused on economic development and determined to place all resources and apply all leavers, regardless of source and political niceties, toward that end