Sakellari, E., Proukakis, N. P., Leadbeater, M., Adams, C. S.
This paper discusses the feasibility of experimental control of the flow direction of atomic Bose-Einstein condensates in a double-well potential using phase-imprinting. The flow is induced by the...
Josephson Current Counterflow in Atomic Bose-Einstein Condensates (2003)
Sakellari, E., Proukakis, N. P., Leadbeater, M., Adams, C. S.
Josephson weak links in superconductors can be engineered such that the phase difference across the junction is $\pi$ ($\pi$-junction),leading to the reversal of the current. The conditions under...
Soliton-sound interactions in quasi-one-dimensional Bose-Einstein condensates. (2003)
Parker, N. G., Proukakis, N. P., Leadbeater, M., Adams, C. S.
Longitudinal confinement of dark solitons in quasi-one-dimensional Bose-Einstein condensates leads to sound emission and reabsorption.We perform quantitative studies of the dynamics of a soliton...
Deformation of dark solitons in inhomogeneous Bose-Einstein condensates (2003)
Parker, N. G., Proukakis, N. P., Leadbeater, M., Adams, C. S.
A dark soliton becomes unstable when it is incident on a background density gradient, and the induced instability results in the emission of sound. Detailed quantitative studies of sound emission are...
Soliton-sound interactions in quasi-one-dimensional Bose-Einstein condensates (2002)
Parker, N. G., Proukakis, N. P., Leadbeater, M., Adams, C. S.
Longitudinal confinement of dark solitons in quasi-one-dimensional Bose-Einstein condensates leads to sound emission and reabsorption. We perform quantitative studies of the dynamics of a soliton...
Scott, R. G., Martin, A. M., Fromhold, T. M., Bujkiewicz, S., Sheard, F. W., Leadbeater, M.
We study the dynamics of Bose-Einstein condensates in an optical lattice and harmonic trap. The condensates are set in motion by displacing the trap and initially follow simple semiclassical paths,...
Decay of superfluid turbulence via Kelvin wave radiation and vortex reconnections (2002)
Leadbeater, M., Samuels, D. C., Barenghi, C. F., Adams, C. S.
The elementary processes involved in the decay of superfluid turbulence in the limit of low temperature are studied by numerical simulations of vortex ring collisions. We find that small vortex rings...
Josephson spectroscopy of a dilute Bose-Einstein condensate in a double-well potential (2002)
Sakellari, E., Leadbeater, M., Kylstra, N. J., Adams, C. S.
The dynamics of a Bose-Einstein condensate in a double-well potential are analysed in terms of transitions between energy eigenstates. By solving the time-dependent and time-independent...
Semiclassical theory of integrable and rough Andreev billiards (2001)
Ihra, Wolfgang, Leadbeater, M., Vega, J., Richter, Klaus
We study the effect on the density of states in mesoscopic ballistic billiards to which a superconducting lead is attached. The expression for the density of states is derived in the semiclassical...
Sound emission due to superfluid vortex reconnections. (2001)
Leadbeater, M., Winiecki, T., Samuels, D. C., Barenghi, C. F., Adams, C. S.
By performing numerical simulations based on the Gross-Pitaevskii equation, we make direct quantitative measurements of the sound energy released due to superfluid vortex reconnections. We show that...
Spin-orbit induced anisotropy in the magnetoconductance of two-dimensional metals (2001)
Raimondi, R., Leadbeater, M., Schwab, P., Caroti, E., Castellani, C.
It is shown that the spin-orbit coupling due to structure inversion asymmetry leads to a characteristic anisotropy in the magnetoconductance of two-dimensional metals. Relevance for recent...
Sound Emission due to Superfluid Vortex Reconnections (2001)
Adams, C. S., Barenghi, C. F., Leadbeater, M., Samuels, D. C., Winiecki, T.
Sound emission due to superfluid vortex reconnections (2000)
Leadbeater, M., Winiecki, T., Samuels, D. C., Barenghi, C. F., Adams, C. S.
By performing numerical simulations of superfluid vortex ring collisions we make direct quantitative measurements of the sound energy released due to vortex reconnections. We show that the energy...
Semiclassical Theory of Integrable and Rough Andreev Billiards (1999)
Ihra, W., Leadbeater, M., Vega, J. L., Richter, K.
We study the effect on the density of states in mesoscopic ballistic billiards to which a superconducting lead is attached. The expression for the density of states is derived in the semiclassical...
Numerical results for two interacting particles in a random environment (1999)
Roemer, R. A., Leadbeater, M., Schreiber, M.
Much evidence has been collected to date which shows that repulsive electron-electron interaction can lead to the formation of particle pairs in a one-dimensional random energy landscape. The...
Non-linear conductivity and quantum interference in disordered metals (1999)
Leadbeater, M., Raimondi, R., Schwab, P., Castellani, C.
We report on a novel non-linear electric field effect in the conductivity of disordered conductors. We find that an electric field gives rise to dephasing in the particle-hole channel, which...
L\'{e}vy flights in quantum transport in quasi-ballistic wires (1999)
Leadbeater, M., Falko, V. I., Lambert, C. J.
Conductance fluctuations, localization and statistics of Lyapunov exponents are studied numerically in pure metallic wires with rough boundaries (quasi-ballistic wires). We find that the correlation...
Numerical Results for Two Interacting Particles in a Random Environment (1999)
R. A. Römer, M. Leadbeater, M. Schreiber
. Much evidence has been collected to date which shows that repulsive electronelectron interaction can lead to the formation of particle pairs in a one-dimensional random energy landscape. The...
Sub-gap conductance in ferromagnetic-superconducting mesoscopic structures (1998)
Leadbeater, M., Lambert, C. J., Raimondi, R., Volkov, A. F.
We study the sub-gap conductance of a ferromagnetic mesoscopic region attached to a ferromagnetic and a superconducting electrode by means of tunnel junctions. In the absence of the exchange field,...
Seviour, R., Lambert, C. J., Leadbeater, M.
Experiments on hybrid superconducting normal-metal structures have revealed that even in the absence of tunnel junctions the onset of superconductivity can lead to a decrease in the electrical...
Resonant Andreev Scattering In Phase-Coherent, Superconducting Nanostructures (1995)
Claughton, N. R., Leadbeater, M., Lambert, C. J., Prigodin, V. N.
Analytic predictions for resonant transport in three generic structures are presented. For a structure comprising a normal (N) contact - normal dot (NDOT) - superconducting (S) contact, we predict...
PETRING, O. U., DAWSON, P. J., BLAKE, D. W., JONES, D. J., BJORKSTEN, A. R., LIBRERI, F. C., ...
We have assessed the effect of i.m. ketorolac or morphine on early postoperative gastric emptying of liquids in patients undergoing orthopaedic surgery with spinal anaesthesia. Liquid gastric...