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pro vyhledávání: '"Nicholson, Amy N."'
Autor:
Nicholson, Amy N.
Lattice field theory is a non-perturbative tool for studying properties of strongly interacting field theories, which is particularly amenable to numerical calculations and has quantifiable systematic errors. In these lectures we apply these techniqu
Externí odkaz:
http://arxiv.org/abs/1608.02563
Autor:
Nicholson, Amy N.
Probability distributions for correlation functions of particles interacting via random-valued fields are discussed as a novel tool for determining the spectrum of a theory. In particular, this method is used to determine the energies of universal N-
Externí odkaz:
http://arxiv.org/abs/1508.07493
Publikováno v:
Phys. Rev. C 92, 035809 (2015)
Neutron matter at densities of the order of the nuclear saturation density is believed to have neutrons paired in the 3P2 channel. We study the low lying modes of this phase and find two massless modes (angulons), resulting from the spontaneous break
Externí odkaz:
http://arxiv.org/abs/1408.5145
Autor:
Nicholson, Amy N., Detmold, William
We present results for the ground-state mass shifts of octet baryons due to the presence of a medium of pions or kaons from a lattice QCD calculation performed at a single value of the quark mass, corresponding to a pion mass of $m_\pi$ ~ 390 MeV, an
Externí odkaz:
http://arxiv.org/abs/1311.3273
Autor:
Detmold, William, Nicholson, Amy N.
Publikováno v:
Phys. Rev. D 88, 074501 (2013)
We present a lattice QCD calculation of the ground-state energy shifts of various baryons in a medium of pions or kaons at a single value of the quark mass corresponding to a pion mass of m_\pi~390 MeV and a kaon mass of m_K~540 MeV, and in a spatial
Externí odkaz:
http://arxiv.org/abs/1308.5186
Autor:
Bedaque, Paulo F., Nicholson, Amy N.
Publikováno v:
Phys. Rev. C 87, 055807 (2013)
The condensation of neutrons into a 3P2 superfluid phase occurs at densities relevant for the interior of neutron stars. The triplet pairing breaks rotational symmetry spontaneously and leads to the existence of gapless modes (angulons) that are rele
Externí odkaz:
http://arxiv.org/abs/1212.1122
Due to the presence of light pions in the theory, lattice QCD at finite densities suffers from issues with noise in both grand canonical and canonical formulations. We study two different formulations of the Nambu-Jona-Lasinio model reduced to 2+1 di
Externí odkaz:
http://arxiv.org/abs/1210.7250
Autor:
Drut, Joaquín E., Nicholson, Amy N.
Publikováno v:
J. Phys. G: Nucl. Part. Phys. 40 043101 (2013)
Lattice field theory methods, usually associated with non-perturbative studies of quantum chromodynamics, are becoming increasingly common in the calculation of ground-state and thermal properties of strongly interacting non-relativistic few- and man
Externí odkaz:
http://arxiv.org/abs/1208.6556
Publikováno v:
Physical Review D 87, 014504 (2013)
The Nambu-Jona-Lasinio model reduced to 2+1 dimensions has two different path integral formulations: at finite chemical potential one formulation has a severe sign problem similar to that found in QCD, while the other does not. At large N, where N is
Externí odkaz:
http://arxiv.org/abs/1208.5760
Publikováno v:
Phys. Rev. A 87, 023615 (2013)
We perform lattice Monte Carlo simulations for up to 66 unitary fermions in a finite box using a highly improved lattice action for nonrelativistic spin 1/2 fermions. We obtain a value of $0.366^{+0.016}_{-0.011}$ for the Bertsch parameter, defined a
Externí odkaz:
http://arxiv.org/abs/1203.3169