122 citations
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9 papers
Chandra Discovery of a Candidate Hyper-Luminous X-ray Source in MCG+11-11-032
Adi Foord, Francesca Civano, Julia M. Comerford +9
We present a multi-wavelength analysis of MCG+11-11-032, a nearby AGN with the unique classification of both a binary and a dual AGN candidate. With new Chandra observations we aim…
Efficient Cluster Algorithm for CP(N-1) Models
B. B Beard, M. Pepe, S. Riederer +1
Despite several attempts, no efficient cluster algorithm has been constructed for CP(N-1) models in the standard Wilson formulation of lattice field theory. In fact, there is a no-…
An Efficient Cluster Algorithm for CP(N-1) Models
B. B. Beard, M. Pepe, S. Riederer +1
We construct an efficient cluster algorithm for ferromagnetic SU(N)-symmetric quantum spin systems. Such systems provide a new regularization for CP(N-1) models in the framework of…
Study of the 2-d CP(N-1) models at θ=0 and π
B. B. Beard, M. Pepe, S. Riederer +1
We present numerical results for 2-d CP(N-1) models at θ=0 and πobtained in the D-theory formulation. In this formulation we construct an efficient cluster algorithm and we show nu…
Study of CP(N-1) θ-Vacua by Cluster-Simulation of SU(N) Quantum Spin Ladders
B. B. Beard, M. Pepe, S. Riederer +1
D-theory provides an alternative lattice regularization of the (1+1)-d CP(N-1) quantum field theory. In this formulation the continuous classical CP(N-1) fields emerge from the dim…
Quantum 2D Heisenberg antiferromagnet: bridging the gap between field-theoretical and semiclassical approaches
Bernard B. Beard, Alessandro Cuccoli, Ruggero Vaia +1
The field-theoretical result for the low- behaviour of the correlation length of the quantum Heisenberg antiferromagnet on the square lattice was recently improved by Hasenfratz…