- Centre National de la Recherche ScientifiqueFR568 papers
- University of OxfordGB500 papers
- University of CambridgeGB477 papers
- University of EdinburghGB451 papers
- Royal ObservatoryGB428 papers
- California Institute of TechnologyUS350 papers
- Durham UniversityGB342 papers
- European Southern ObservatoryCL334 papers
- University College LondonGB329 papers
- National Institute for AstrophysicsIT318 papers
- Imperial College LondonGB312 papers
- Leiden UniversityNL297 papers
8 papers · 1 filter
A note on area variables in Regge calculus
John W. Barrett, Martin Rocek, Ruth M. Williams
We consider the possibility of setting up a new version of Regge calculus in four dimensions with areas of triangles as the basic variables rather than the edge-lengths. The diffic…
Relativistic spin networks and quantum gravity
John W. Barrett, Louis Crane
Relativistic spin networks are defined by considering the spin covering of the group SO(4), SU(2) times SU(2). Relativistic quantum spins are related to the geometry of the 2-dimen…
Principles of Discrete Time Mechanics: IV. The Dirac Equation, Particles and Oscillons
Keith Norton, George Jaroszkiewicz
We apply the principles of discrete time mechanics discussed in earlier papers to the first and second quantised Dirac equation. We use the Schwinger action principle to find the a…
Principles of Discrete Time Mechanics: III. Quantum Field Theory
Keith Norton, George Jaroszkiewicz
We apply the principles discussed in earlier papers to the construction of discrete time quantum field theories. We use the Schwinger action principle to find the discrete time fre…
Fractional Quantum Hall Effect Measurements at Zero g-Factor
D. R. Leadley, R. J. Nicholas, D. K. Maude +4
Fractional quantum Hall effect energy gaps have been measured in GaAs/GaAlAs heterojunctions as a function of Zeeman energy, which is varied by applying hydrostatic pressure up to…
Principles of Discrete Time Mechanics: II. Classical field Theory
George Jaroszkiewicz, Keith Norton
We apply the principles discussed in an earlier paper to the construction of discrete time field theories. We derive the discrete time field equations of motion and Noether's theor…