157 citations
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- Astronomical Observatory of RomeIT1 paper
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14 papers
Compact QED: the photon propagator, confinement and positivity violation for the pure gauge theory
Orlando Oliveira, Lee C. Loveridge, Paulo J. Silva
The lattice Landau gauge photon propagator for the pure gauge theory is revisited using large lattices. For the confined case we show that it has an associated linearly growing pot…
The Schwinger function, confinement and positivity violation in pure gauge QED
Lee C. Loveridge, Orlando Oliveira, Paulo J. Silva
The lattice regularized pure gauge compact U(1) theory is an ideal laboratory to explore how confinement is realized as its phase diagram has a confined and a deconfined phase that…
Lattice pure gauge compact QED in the Landau gauge: the photon propagator, the phase structure and the presence of Dirac strings
Lee C. Loveridge, Orlando Oliveira, Paulo J. Silva
In this work we investigate the lattice Landau gauge photon propagator together with the average number of Dirac strings in the compact formulation of QED for the pure gauge versio…
The lattice Landau gauge photon propagator for 4D compact QED
Lee C. Loveridge, Orlando Oliveira, Paulo J. Silva
In this work we report on the Landau gauge photon propagator computed for pure gauge 4D compact QED in the confined and deconfined phases and for large lattices volumes: , $4…
Swarming, swirling and stasis in sequestered bristle-bots
L. Giomi, N. Hawley-Weld, L. Mahadevan
The collective ability of organisms to move coherently in space and time is ubiquitous in any group of autonomous agents that can move and sense each other and the environment. Her…
Orphan-Free Anisotropic Voronoi Diagrams
Guillermo D. Canas, Steven J. Gortler
We describe conditions under which an appropriately-defined anisotropic Voronoi diagram of a set of sites in Euclidean space is guaranteed to be composed of connected cells in any…