Zobrazeno 1 - 10
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pro vyhledávání: '"Jorg, T."'
Autor:
Yang, Y., Richter, R., Halfmann, M.C., Graafen, D., Hell, M., Vecsey-Nagy, M., Laux, G., Kavermann, L., Jorg, T., Geyer, M., Varga-Szemes, A., Emrich, T.
Publikováno v:
In European Journal of Radiology September 2024 178
Publikováno v:
EPL, 89 (2010) 40004
We study first-order quantum phase transitions in models where the mean-field traitment is exact, and the exponentially fast closure of the energy gap with the system size at the transition. We consider exactly solvable ferromagnetic models, and show
Externí odkaz:
http://arxiv.org/abs/0912.4865
Publikováno v:
Phys. Rev. Lett. 104, 207206 (2010)
We present a study of the phase diagram of a random optimization problem in presence of quantum fluctuations. Our main result is the characterization of the nature of the phase transition, which we find to be a first-order quantum phase transition. W
Externí odkaz:
http://arxiv.org/abs/0911.3438
Akademický článek
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Publikováno v:
J. Stat. Mech.: Theor. Exp. (2009) P02002
We discuss interfaces in spin glasses. We present new theoretical results and a numerical method to characterize overlap interfaces and the stability of the spin-glass phase in extended disordered systems. We use this definition to characterize the l
Externí odkaz:
http://arxiv.org/abs/0809.0106
Publikováno v:
Physical Review Letters 96 (2006) 237205
At zero temperature, two-dimensional Ising spin glasses are known to fall into several universality classes. Here we consider the scaling at low but non-zero temperature and provide numerical evidence that $\eta \approx 0$ and $\nu \approx 3.5$ in al
Externí odkaz:
http://arxiv.org/abs/cond-mat/0601480
Publikováno v:
Nucl.Phys.B643:280-320,2002
We present the first set of quenched QCD measurements using the recently parametrized fixed-point Dirac operator D^FP. We also give a general and practical construction of covariant densities and conserved currents for chiral lattice actions. The mea
Externí odkaz:
http://arxiv.org/abs/hep-lat/0205010
Publikováno v:
Nucl.Phys.Proc.Suppl. 106 (2002) 751-756
In this preliminary study, we examine the chiral properties of the parametrized Fixed-Point Dirac operator D^FP, see how to improve its chirality via the Overlap construction, measure the renormalized quark condensate Sigma and the topological suscep
Externí odkaz:
http://arxiv.org/abs/hep-lat/0109007
Publikováno v:
Nucl.Phys.Proc.Suppl. 106 (2002) 799-801
We have constructed a new fermion action which is an approximation to the (chirally symmetric) Fixed-Point action, containing the full Clifford algebra with couplings inside a hypercube and paths built from renormalization group inspired fat links. W
Externí odkaz:
http://arxiv.org/abs/hep-lat/0109004
Publikováno v:
Nucl.Phys.Proc.Suppl. 94 (2001) 627-635
We report on an ongoing project to parametrize the Fixed-Point Dirac operator for massless quarks, using a very general construction which has arbitrarily many fermion offsets and gauge paths, the complete Clifford algebra and satisfies all required
Externí odkaz:
http://arxiv.org/abs/hep-lat/0010061